1 /*- 2 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from the Stanford/CMU enet packet filter, 6 * (net/enet.c) distributed as part of 4.3BSD, and code contributed 7 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence 8 * Berkeley Laboratory. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)bpf.h 7.1 (Berkeley) 5/7/91 39 * 40 * @(#) $Header: /tcpdump/master/libpcap/pcap-bpf.h,v 1.34.2.5 2005/05/27 23:33:00 guy Exp $ (LBL) 41 */ 42 43 /* 44 * This is libpcap's cut-down version of bpf.h; it includes only 45 * the stuff needed for the code generator and the userland BPF 46 * interpreter, and the libpcap APIs for setting filters, etc.. 47 * 48 * "pcap-bpf.c" will include the native OS version, as it deals with 49 * the OS's BPF implementation. 50 * 51 * XXX - should this all just be moved to "pcap.h"? 52 */ 53 54 #ifndef BPF_MAJOR_VERSION 55 56 #ifdef __cplusplus 57 extern "C" { 58 #endif 59 60 /* BSD style release date */ 61 #define BPF_RELEASE 199606 62 63 #ifdef MSDOS /* must be 32-bit */ 64 typedef long bpf_int32; 65 typedef unsigned long bpf_u_int32; 66 #else 67 typedef int bpf_int32; 68 typedef u_int bpf_u_int32; 69 #endif 70 71 /* 72 * Alignment macros. BPF_WORDALIGN rounds up to the next 73 * even multiple of BPF_ALIGNMENT. 74 */ 75 #ifndef __NetBSD__ 76 #define BPF_ALIGNMENT sizeof(bpf_int32) 77 #else 78 #define BPF_ALIGNMENT sizeof(long) 79 #endif 80 #define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1)) 81 82 #define BPF_MAXINSNS 512 83 #define BPF_MAXBUFSIZE 0x8000 84 #define BPF_MINBUFSIZE 32 85 86 /* 87 * Structure for "pcap_compile()", "pcap_setfilter()", etc.. 88 */ 89 struct bpf_program { 90 u_int bf_len; 91 struct bpf_insn *bf_insns; 92 }; 93 94 /* 95 * Struct return by BIOCVERSION. This represents the version number of 96 * the filter language described by the instruction encodings below. 97 * bpf understands a program iff kernel_major == filter_major && 98 * kernel_minor >= filter_minor, that is, if the value returned by the 99 * running kernel has the same major number and a minor number equal 100 * equal to or less than the filter being downloaded. Otherwise, the 101 * results are undefined, meaning an error may be returned or packets 102 * may be accepted haphazardly. 103 * It has nothing to do with the source code version. 104 */ 105 struct bpf_version { 106 u_short bv_major; 107 u_short bv_minor; 108 }; 109 /* Current version number of filter architecture. */ 110 #define BPF_MAJOR_VERSION 1 111 #define BPF_MINOR_VERSION 1 112 113 /* 114 * Data-link level type codes. 115 * 116 * Do *NOT* add new values to this list without asking 117 * "tcpdump-workers@tcpdump.org" for a value. Otherwise, you run the 118 * risk of using a value that's already being used for some other purpose, 119 * and of having tools that read libpcap-format captures not being able 120 * to handle captures with your new DLT_ value, with no hope that they 121 * will ever be changed to do so (as that would destroy their ability 122 * to read captures using that value for that other purpose). 123 */ 124 125 /* 126 * These are the types that are the same on all platforms, and that 127 * have been defined by <net/bpf.h> for ages. 128 */ 129 #define DLT_NULL 0 /* BSD loopback encapsulation */ 130 #define DLT_EN10MB 1 /* Ethernet (10Mb) */ 131 #define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */ 132 #define DLT_AX25 3 /* Amateur Radio AX.25 */ 133 #define DLT_PRONET 4 /* Proteon ProNET Token Ring */ 134 #define DLT_CHAOS 5 /* Chaos */ 135 #define DLT_IEEE802 6 /* IEEE 802 Networks */ 136 #define DLT_ARCNET 7 /* ARCNET, with BSD-style header */ 137 #define DLT_SLIP 8 /* Serial Line IP */ 138 #define DLT_PPP 9 /* Point-to-point Protocol */ 139 #define DLT_FDDI 10 /* FDDI */ 140 141 /* 142 * These are types that are different on some platforms, and that 143 * have been defined by <net/bpf.h> for ages. We use #ifdefs to 144 * detect the BSDs that define them differently from the traditional 145 * libpcap <net/bpf.h> 146 * 147 * XXX - DLT_ATM_RFC1483 is 13 in BSD/OS, and DLT_RAW is 14 in BSD/OS, 148 * but I don't know what the right #define is for BSD/OS. 149 */ 150 #define DLT_ATM_RFC1483 11 /* LLC-encapsulated ATM */ 151 152 #ifdef __OpenBSD__ 153 #define DLT_RAW 14 /* raw IP */ 154 #else 155 #define DLT_RAW 12 /* raw IP */ 156 #endif 157 158 /* 159 * Given that the only OS that currently generates BSD/OS SLIP or PPP 160 * is, well, BSD/OS, arguably everybody should have chosen its values 161 * for DLT_SLIP_BSDOS and DLT_PPP_BSDOS, which are 15 and 16, but they 162 * didn't. So it goes. 163 */ 164 #if defined(__NetBSD__) || defined(__FreeBSD__) 165 #ifndef DLT_SLIP_BSDOS 166 #define DLT_SLIP_BSDOS 13 /* BSD/OS Serial Line IP */ 167 #define DLT_PPP_BSDOS 14 /* BSD/OS Point-to-point Protocol */ 168 #endif 169 #else 170 #define DLT_SLIP_BSDOS 15 /* BSD/OS Serial Line IP */ 171 #define DLT_PPP_BSDOS 16 /* BSD/OS Point-to-point Protocol */ 172 #endif 173 174 /* 175 * 17 is used for DLT_OLD_PFLOG in OpenBSD; 176 * OBSOLETE: DLT_PFLOG is 117 in OpenBSD now as well. See below. 177 * 18 is used for DLT_PFSYNC in OpenBSD; don't use it for anything else. 178 */ 179 180 #define DLT_ATM_CLIP 19 /* Linux Classical-IP over ATM */ 181 182 /* 183 * Apparently Redback uses this for its SmartEdge 400/800. I hope 184 * nobody else decided to use it, too. 185 */ 186 #define DLT_REDBACK_SMARTEDGE 32 187 188 /* 189 * These values are defined by NetBSD; other platforms should refrain from 190 * using them for other purposes, so that NetBSD savefiles with link 191 * types of 50 or 51 can be read as this type on all platforms. 192 */ 193 #define DLT_PPP_SERIAL 50 /* PPP over serial with HDLC encapsulation */ 194 #define DLT_PPP_ETHER 51 /* PPP over Ethernet */ 195 196 /* 197 * The Axent Raptor firewall - now the Symantec Enterprise Firewall - uses 198 * a link-layer type of 99 for the tcpdump it supplies. The link-layer 199 * header has 6 bytes of unknown data, something that appears to be an 200 * Ethernet type, and 36 bytes that appear to be 0 in at least one capture 201 * I've seen. 202 */ 203 #define DLT_SYMANTEC_FIREWALL 99 204 205 /* 206 * Values between 100 and 103 are used in capture file headers as 207 * link-layer types corresponding to DLT_ types that differ 208 * between platforms; don't use those values for new DLT_ new types. 209 */ 210 211 /* 212 * This value was defined by libpcap 0.5; platforms that have defined 213 * it with a different value should define it here with that value - 214 * a link type of 104 in a save file will be mapped to DLT_C_HDLC, 215 * whatever value that happens to be, so programs will correctly 216 * handle files with that link type regardless of the value of 217 * DLT_C_HDLC. 218 * 219 * The name DLT_C_HDLC was used by BSD/OS; we use that name for source 220 * compatibility with programs written for BSD/OS. 221 * 222 * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well, 223 * for source compatibility with programs written for libpcap 0.5. 224 */ 225 #define DLT_C_HDLC 104 /* Cisco HDLC */ 226 #define DLT_CHDLC DLT_C_HDLC 227 228 #define DLT_IEEE802_11 105 /* IEEE 802.11 wireless */ 229 230 /* 231 * 106 is reserved for Linux Classical IP over ATM; it's like DLT_RAW, 232 * except when it isn't. (I.e., sometimes it's just raw IP, and 233 * sometimes it isn't.) We currently handle it as DLT_LINUX_SLL, 234 * so that we don't have to worry about the link-layer header.) 235 */ 236 237 /* 238 * Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides 239 * with other values. 240 * DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header 241 * (DLCI, etc.). 242 */ 243 #define DLT_FRELAY 107 244 245 /* 246 * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except 247 * that the AF_ type in the link-layer header is in network byte order. 248 * 249 * OpenBSD defines it as 12, but that collides with DLT_RAW, so we 250 * define it as 108 here. If OpenBSD picks up this file, it should 251 * define DLT_LOOP as 12 in its version, as per the comment above - 252 * and should not use 108 as a DLT_ value. 253 */ 254 #define DLT_LOOP 108 255 256 /* 257 * Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's 258 * DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other 259 * than OpenBSD. 260 */ 261 #ifdef __OpenBSD__ 262 #define DLT_ENC 13 263 #else 264 #define DLT_ENC 109 265 #endif 266 267 /* 268 * Values between 110 and 112 are reserved for use in capture file headers 269 * as link-layer types corresponding to DLT_ types that might differ 270 * between platforms; don't use those values for new DLT_ types 271 * other than the corresponding DLT_ types. 272 */ 273 274 /* 275 * This is for Linux cooked sockets. 276 */ 277 #define DLT_LINUX_SLL 113 278 279 /* 280 * Apple LocalTalk hardware. 281 */ 282 #define DLT_LTALK 114 283 284 /* 285 * Acorn Econet. 286 */ 287 #define DLT_ECONET 115 288 289 /* 290 * Reserved for use with OpenBSD ipfilter. 291 */ 292 #define DLT_IPFILTER 116 293 294 /* 295 * OpenBSD DLT_PFLOG; DLT_PFLOG is 17 in OpenBSD, but that's DLT_LANE8023 296 * in SuSE 6.3, so we can't use 17 for it in capture-file headers. 297 * 298 * XXX: is there a conflict with DLT_PFSYNC 18 as well? 299 */ 300 #ifdef __OpenBSD__ 301 #define DLT_OLD_PFLOG 17 302 #define DLT_PFSYNC 18 303 #endif 304 #define DLT_PFLOG 117 305 306 /* 307 * Registered for Cisco-internal use. 308 */ 309 #define DLT_CISCO_IOS 118 310 311 /* 312 * For 802.11 cards using the Prism II chips, with a link-layer 313 * header including Prism monitor mode information plus an 802.11 314 * header. 315 */ 316 #define DLT_PRISM_HEADER 119 317 318 /* 319 * Reserved for Aironet 802.11 cards, with an Aironet link-layer header 320 * (see Doug Ambrisko's FreeBSD patches). 321 */ 322 #define DLT_AIRONET_HEADER 120 323 324 /* 325 * Reserved for Siemens HiPath HDLC. 326 */ 327 #define DLT_HHDLC 121 328 329 /* 330 * This is for RFC 2625 IP-over-Fibre Channel. 331 * 332 * This is not for use with raw Fibre Channel, where the link-layer 333 * header starts with a Fibre Channel frame header; it's for IP-over-FC, 334 * where the link-layer header starts with an RFC 2625 Network_Header 335 * field. 336 */ 337 #define DLT_IP_OVER_FC 122 338 339 /* 340 * This is for Full Frontal ATM on Solaris with SunATM, with a 341 * pseudo-header followed by an AALn PDU. 342 * 343 * There may be other forms of Full Frontal ATM on other OSes, 344 * with different pseudo-headers. 345 * 346 * If ATM software returns a pseudo-header with VPI/VCI information 347 * (and, ideally, packet type information, e.g. signalling, ILMI, 348 * LANE, LLC-multiplexed traffic, etc.), it should not use 349 * DLT_ATM_RFC1483, but should get a new DLT_ value, so tcpdump 350 * and the like don't have to infer the presence or absence of a 351 * pseudo-header and the form of the pseudo-header. 352 */ 353 #define DLT_SUNATM 123 /* Solaris+SunATM */ 354 355 /* 356 * Reserved as per request from Kent Dahlgren <kent@praesum.com> 357 * for private use. 358 */ 359 #define DLT_RIO 124 /* RapidIO */ 360 #define DLT_PCI_EXP 125 /* PCI Express */ 361 #define DLT_AURORA 126 /* Xilinx Aurora link layer */ 362 363 /* 364 * Header for 802.11 plus a number of bits of link-layer information 365 * including radio information, used by some recent BSD drivers as 366 * well as the madwifi Atheros driver for Linux. 367 */ 368 #define DLT_IEEE802_11_RADIO 127 /* 802.11 plus radiotap radio header */ 369 370 /* 371 * Reserved for the TZSP encapsulation, as per request from 372 * Chris Waters <chris.waters@networkchemistry.com> 373 * TZSP is a generic encapsulation for any other link type, 374 * which includes a means to include meta-information 375 * with the packet, e.g. signal strength and channel 376 * for 802.11 packets. 377 */ 378 #define DLT_TZSP 128 /* Tazmen Sniffer Protocol */ 379 380 /* 381 * BSD's ARCNET headers have the source host, destination host, 382 * and type at the beginning of the packet; that's what's handed 383 * up to userland via BPF. 384 * 385 * Linux's ARCNET headers, however, have a 2-byte offset field 386 * between the host IDs and the type; that's what's handed up 387 * to userland via PF_PACKET sockets. 388 * 389 * We therefore have to have separate DLT_ values for them. 390 */ 391 #define DLT_ARCNET_LINUX 129 /* ARCNET */ 392 393 /* 394 * Juniper-private data link types, as per request from 395 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 396 * for passing on chassis-internal metainformation such as 397 * QOS profiles, etc.. 398 */ 399 #define DLT_JUNIPER_MLPPP 130 400 #define DLT_JUNIPER_MLFR 131 401 #define DLT_JUNIPER_ES 132 402 #define DLT_JUNIPER_GGSN 133 403 #define DLT_JUNIPER_MFR 134 404 #define DLT_JUNIPER_ATM2 135 405 #define DLT_JUNIPER_SERVICES 136 406 #define DLT_JUNIPER_ATM1 137 407 408 /* 409 * Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund 410 * <dieter@apple.com>. The header that's presented is an Ethernet-like 411 * header: 412 * 413 * #define FIREWIRE_EUI64_LEN 8 414 * struct firewire_header { 415 * u_char firewire_dhost[FIREWIRE_EUI64_LEN]; 416 * u_char firewire_shost[FIREWIRE_EUI64_LEN]; 417 * u_short firewire_type; 418 * }; 419 * 420 * with "firewire_type" being an Ethernet type value, rather than, 421 * for example, raw GASP frames being handed up. 422 */ 423 #define DLT_APPLE_IP_OVER_IEEE1394 138 424 425 /* 426 * Various SS7 encapsulations, as per a request from Jeff Morriss 427 * <jeff.morriss[AT]ulticom.com> and subsequent discussions. 428 */ 429 #define DLT_MTP2_WITH_PHDR 139 /* pseudo-header with various info, followed by MTP2 */ 430 #define DLT_MTP2 140 /* MTP2, without pseudo-header */ 431 #define DLT_MTP3 141 /* MTP3, without pseudo-header or MTP2 */ 432 #define DLT_SCCP 142 /* SCCP, without pseudo-header or MTP2 or MTP3 */ 433 434 /* 435 * DOCSIS MAC frames. 436 */ 437 #define DLT_DOCSIS 143 438 439 /* 440 * Linux-IrDA packets. Protocol defined at http://www.irda.org. 441 * Those packets include IrLAP headers and above (IrLMP...), but 442 * don't include Phy framing (SOF/EOF/CRC & byte stuffing), because Phy 443 * framing can be handled by the hardware and depend on the bitrate. 444 * This is exactly the format you would get capturing on a Linux-IrDA 445 * interface (irdaX), but not on a raw serial port. 446 * Note the capture is done in "Linux-cooked" mode, so each packet include 447 * a fake packet header (struct sll_header). This is because IrDA packet 448 * decoding is dependant on the direction of the packet (incoming or 449 * outgoing). 450 * When/if other platform implement IrDA capture, we may revisit the 451 * issue and define a real DLT_IRDA... 452 * Jean II 453 */ 454 #define DLT_LINUX_IRDA 144 455 456 /* 457 * Reserved for IBM SP switch and IBM Next Federation switch. 458 */ 459 #define DLT_IBM_SP 145 460 #define DLT_IBM_SN 146 461 462 /* 463 * Reserved for private use. If you have some link-layer header type 464 * that you want to use within your organization, with the capture files 465 * using that link-layer header type not ever be sent outside your 466 * organization, you can use these values. 467 * 468 * No libpcap release will use these for any purpose, nor will any 469 * tcpdump release use them, either. 470 * 471 * Do *NOT* use these in capture files that you expect anybody not using 472 * your private versions of capture-file-reading tools to read; in 473 * particular, do *NOT* use them in products, otherwise you may find that 474 * people won't be able to use tcpdump, or snort, or Ethereal, or... to 475 * read capture files from your firewall/intrusion detection/traffic 476 * monitoring/etc. appliance, or whatever product uses that DLT_ value, 477 * and you may also find that the developers of those applications will 478 * not accept patches to let them read those files. 479 * 480 * Also, do not use them if somebody might send you a capture using them 481 * for *their* private type and tools using them for *your* private type 482 * would have to read them. 483 * 484 * Instead, ask "tcpdump-workers@tcpdump.org" for a new DLT_ value, 485 * as per the comment above, and use the type you're given. 486 */ 487 #define DLT_USER0 147 488 #define DLT_USER1 148 489 #define DLT_USER2 149 490 #define DLT_USER3 150 491 #define DLT_USER4 151 492 #define DLT_USER5 152 493 #define DLT_USER6 153 494 #define DLT_USER7 154 495 #define DLT_USER8 155 496 #define DLT_USER9 156 497 #define DLT_USER10 157 498 #define DLT_USER11 158 499 #define DLT_USER12 159 500 #define DLT_USER13 160 501 #define DLT_USER14 161 502 #define DLT_USER15 162 503 504 /* 505 * For future use with 802.11 captures - defined by AbsoluteValue 506 * Systems to store a number of bits of link-layer information 507 * including radio information: 508 * 509 * http://www.shaftnet.org/~pizza/software/capturefrm.txt 510 * 511 * but it might be used by some non-AVS drivers now or in the 512 * future. 513 */ 514 #define DLT_IEEE802_11_RADIO_AVS 163 /* 802.11 plus AVS radio header */ 515 516 /* 517 * Juniper-private data link type, as per request from 518 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 519 * for passing on chassis-internal metainformation such as 520 * QOS profiles, etc.. 521 */ 522 #define DLT_JUNIPER_MONITOR 164 523 524 /* 525 * Reserved for BACnet MS/TP. 526 */ 527 #define DLT_BACNET_MS_TP 165 528 529 /* 530 * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>. 531 * 532 * This is used in some OSes to allow a kernel socket filter to distinguish 533 * between incoming and outgoing packets, on a socket intended to 534 * supply pppd with outgoing packets so it can do dial-on-demand and 535 * hangup-on-lack-of-demand; incoming packets are filtered out so they 536 * don't cause pppd to hold the connection up (you don't want random 537 * input packets such as port scans, packets from old lost connections, 538 * etc. to force the connection to stay up). 539 * 540 * The first byte of the PPP header (0xff03) is modified to accomodate 541 * the direction - 0x00 = IN, 0x01 = OUT. 542 */ 543 #define DLT_PPP_PPPD 166 544 545 /* 546 * Names for backwards compatibility with older versions of some PPP 547 * software; new software should use DLT_PPP_PPPD. 548 */ 549 #define DLT_PPP_WITH_DIRECTION DLT_PPP_PPPD 550 #define DLT_LINUX_PPP_WITHDIRECTION DLT_PPP_PPPD 551 552 /* 553 * Juniper-private data link type, as per request from 554 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 555 * for passing on chassis-internal metainformation such as 556 * QOS profiles, cookies, etc.. 557 */ 558 #define DLT_JUNIPER_PPPOE 167 559 #define DLT_JUNIPER_PPPOE_ATM 168 560 561 #define DLT_GPRS_LLC 169 /* GPRS LLC */ 562 #define DLT_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */ 563 #define DLT_GPF_F 171 /* GPF-F (ITU-T G.7041/Y.1303) */ 564 565 /* 566 * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line 567 * monitoring equipment. 568 */ 569 #define DLT_GCOM_T1E1 172 570 #define DLT_GCOM_SERIAL 173 571 572 /* 573 * Juniper-private data link type, as per request from 574 * Hannes Gredler <hannes@juniper.net>. The DLT_ is used 575 * for internal communication to Physical Interface Cards (PIC) 576 */ 577 #define DLT_JUNIPER_PIC_PEER 174 578 579 /* 580 * Link types requested by Gregor Maier <gregor@endace.com> of Endace 581 * Measurement Systems. They add an ERF header (see 582 * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of 583 * the link-layer header. 584 */ 585 #define DLT_ERF_ETH 175 /* Ethernet */ 586 #define DLT_ERF_POS 176 /* Packet-over-SONET */ 587 588 /* 589 * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD 590 * for vISDN (http://www.orlandi.com/visdn/). Its link-layer header 591 * includes additional information before the LAPD header, so it's 592 * not necessarily a generic LAPD header. 593 */ 594 #define DLT_LINUX_LAPD 177 595 596 /* 597 * The instruction encodings. 598 */ 599 /* instruction classes */ 600 #define BPF_CLASS(code) ((code) & 0x07) 601 #define BPF_LD 0x00 602 #define BPF_LDX 0x01 603 #define BPF_ST 0x02 604 #define BPF_STX 0x03 605 #define BPF_ALU 0x04 606 #define BPF_JMP 0x05 607 #define BPF_RET 0x06 608 #define BPF_MISC 0x07 609 610 /* ld/ldx fields */ 611 #define BPF_SIZE(code) ((code) & 0x18) 612 #define BPF_W 0x00 613 #define BPF_H 0x08 614 #define BPF_B 0x10 615 #define BPF_MODE(code) ((code) & 0xe0) 616 #define BPF_IMM 0x00 617 #define BPF_ABS 0x20 618 #define BPF_IND 0x40 619 #define BPF_MEM 0x60 620 #define BPF_LEN 0x80 621 #define BPF_MSH 0xa0 622 623 /* alu/jmp fields */ 624 #define BPF_OP(code) ((code) & 0xf0) 625 #define BPF_ADD 0x00 626 #define BPF_SUB 0x10 627 #define BPF_MUL 0x20 628 #define BPF_DIV 0x30 629 #define BPF_OR 0x40 630 #define BPF_AND 0x50 631 #define BPF_LSH 0x60 632 #define BPF_RSH 0x70 633 #define BPF_NEG 0x80 634 #define BPF_JA 0x00 635 #define BPF_JEQ 0x10 636 #define BPF_JGT 0x20 637 #define BPF_JGE 0x30 638 #define BPF_JSET 0x40 639 #define BPF_SRC(code) ((code) & 0x08) 640 #define BPF_K 0x00 641 #define BPF_X 0x08 642 643 /* ret - BPF_K and BPF_X also apply */ 644 #define BPF_RVAL(code) ((code) & 0x18) 645 #define BPF_A 0x10 646 647 /* misc */ 648 #define BPF_MISCOP(code) ((code) & 0xf8) 649 #define BPF_TAX 0x00 650 #define BPF_TXA 0x80 651 652 /* 653 * The instruction data structure. 654 */ 655 struct bpf_insn { 656 u_short code; 657 u_char jt; 658 u_char jf; 659 bpf_int32 k; 660 }; 661 662 /* 663 * Macros for insn array initializers. 664 */ 665 #define BPF_STMT(code, k) { (u_short)(code), 0, 0, k } 666 #define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k } 667 668 #if __STDC__ || defined(__cplusplus) 669 extern int bpf_validate(struct bpf_insn *, int); 670 extern u_int bpf_filter(struct bpf_insn *, u_char *, u_int, u_int); 671 #else 672 extern int bpf_validate(); 673 extern u_int bpf_filter(); 674 #endif 675 676 /* 677 * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST). 678 */ 679 #define BPF_MEMWORDS 16 680 681 #ifdef __cplusplus 682 } 683 #endif 684 685 #endif 686