1 /* 2 * Copyright (c) 1993, 1994, 1995, 1996, 1997 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 * 21 * pcap-common.c - common code for pcap and pcapng files 22 */ 23 24 #ifdef HAVE_CONFIG_H 25 #include <config.h> 26 #endif 27 28 #include <pcap-types.h> 29 30 #include "pcap-int.h" 31 #include "extract.h" 32 #include "pcap/sll.h" 33 #include "pcap/usb.h" 34 #include "pcap/nflog.h" 35 #include "pcap/can_socketcan.h" 36 37 #include "pcap-common.h" 38 39 /* 40 * We don't write DLT_* values to capture files, because they're not the 41 * same on all platforms. 42 * 43 * Unfortunately, the various flavors of BSD have not always used the same 44 * numerical values for the same data types, and various patches to 45 * libpcap for non-BSD OSes have added their own DLT_* codes for link 46 * layer encapsulation types seen on those OSes, and those codes have had, 47 * in some cases, values that were also used, on other platforms, for other 48 * link layer encapsulation types. 49 * 50 * This means that capture files of a type whose numerical DLT_* code 51 * means different things on different BSDs, or with different versions 52 * of libpcap, can't always be read on systems other than those like 53 * the one running on the machine on which the capture was made. 54 * 55 * Instead, we define here a set of LINKTYPE_* codes, and map DLT_* codes 56 * to LINKTYPE_* codes when writing a savefile header, and map LINKTYPE_* 57 * codes to DLT_* codes when reading a savefile header. 58 * 59 * For those DLT_* codes that have, as far as we know, the same values on 60 * all platforms (DLT_NULL through DLT_FDDI), we define LINKTYPE_xxx as 61 * DLT_xxx; that way, captures of those types can still be read by 62 * versions of libpcap that map LINKTYPE_* values to DLT_* values, and 63 * captures of those types written by versions of libpcap that map DLT_ 64 * values to LINKTYPE_ values can still be read by older versions 65 * of libpcap. 66 * 67 * The other LINKTYPE_* codes are given values starting at 100, in the 68 * hopes that no DLT_* code will be given one of those values. 69 * 70 * In order to ensure that a given LINKTYPE_* code's value will refer to 71 * the same encapsulation type on all platforms, you should not allocate 72 * a new LINKTYPE_* value without consulting 73 * "tcpdump-workers@lists.tcpdump.org". The tcpdump developers will 74 * allocate a value for you, and will not subsequently allocate it to 75 * anybody else; that value will be added to the "pcap.h" in the 76 * tcpdump.org Git repository, so that a future libpcap release will 77 * include it. 78 * 79 * You should, if possible, also contribute patches to libpcap and tcpdump 80 * to handle the new encapsulation type, so that they can also be checked 81 * into the tcpdump.org Git repository and so that they will appear in 82 * future libpcap and tcpdump releases. 83 * 84 * Do *NOT* assume that any values after the largest value in this file 85 * are available; you might not have the most up-to-date version of this 86 * file, and new values after that one might have been assigned. Also, 87 * do *NOT* use any values below 100 - those might already have been 88 * taken by one (or more!) organizations. 89 * 90 * Any platform that defines additional DLT_* codes should: 91 * 92 * request a LINKTYPE_* code and value from tcpdump.org, 93 * as per the above; 94 * 95 * add, in their version of libpcap, an entry to map 96 * those DLT_* codes to the corresponding LINKTYPE_* 97 * code; 98 * 99 * redefine, in their "net/bpf.h", any DLT_* values 100 * that collide with the values used by their additional 101 * DLT_* codes, to remove those collisions (but without 102 * making them collide with any of the LINKTYPE_* 103 * values equal to 50 or above; they should also avoid 104 * defining DLT_* values that collide with those 105 * LINKTYPE_* values, either). 106 */ 107 #define LINKTYPE_NULL DLT_NULL 108 #define LINKTYPE_ETHERNET DLT_EN10MB /* also for 100Mb and up */ 109 #define LINKTYPE_EXP_ETHERNET DLT_EN3MB /* 3Mb experimental Ethernet */ 110 #define LINKTYPE_AX25 DLT_AX25 111 #define LINKTYPE_PRONET DLT_PRONET 112 #define LINKTYPE_CHAOS DLT_CHAOS 113 #define LINKTYPE_IEEE802_5 DLT_IEEE802 /* DLT_IEEE802 is used for 802.5 Token Ring */ 114 #define LINKTYPE_ARCNET_BSD DLT_ARCNET /* BSD-style headers */ 115 #define LINKTYPE_SLIP DLT_SLIP 116 #define LINKTYPE_PPP DLT_PPP 117 #define LINKTYPE_FDDI DLT_FDDI 118 119 /* 120 * LINKTYPE_PPP is for use when there might, or might not, be an RFC 1662 121 * PPP in HDLC-like framing header (with 0xff 0x03 before the PPP protocol 122 * field) at the beginning of the packet. 123 * 124 * This is for use when there is always such a header; the address field 125 * might be 0xff, for regular PPP, or it might be an address field for Cisco 126 * point-to-point with HDLC framing as per section 4.3.1 of RFC 1547 ("Cisco 127 * HDLC"). This is, for example, what you get with NetBSD's DLT_PPP_SERIAL. 128 * 129 * We give it the same value as NetBSD's DLT_PPP_SERIAL, in the hopes that 130 * nobody else will choose a DLT_ value of 50, and so that DLT_PPP_SERIAL 131 * captures will be written out with a link type that NetBSD's tcpdump 132 * can read. 133 */ 134 #define LINKTYPE_PPP_HDLC 50 /* PPP in HDLC-like framing */ 135 136 #define LINKTYPE_PPP_ETHER 51 /* NetBSD PPP-over-Ethernet */ 137 138 #define LINKTYPE_SYMANTEC_FIREWALL 99 /* Symantec Enterprise Firewall */ 139 140 /* 141 * These correspond to DLT_s that have different values on different 142 * platforms; we map between these values in capture files and 143 * the DLT_ values as returned by pcap_datalink() and passed to 144 * pcap_open_dead(). 145 */ 146 #define LINKTYPE_ATM_RFC1483 100 /* LLC/SNAP-encapsulated ATM */ 147 #define LINKTYPE_RAW 101 /* raw IP */ 148 #define LINKTYPE_SLIP_BSDOS 102 /* BSD/OS SLIP BPF header */ 149 #define LINKTYPE_PPP_BSDOS 103 /* BSD/OS PPP BPF header */ 150 151 /* 152 * Values starting with 104 are used for newly-assigned link-layer 153 * header type values; for those link-layer header types, the DLT_ 154 * value returned by pcap_datalink() and passed to pcap_open_dead(), 155 * and the LINKTYPE_ value that appears in capture files, are the 156 * same. 157 * 158 * LINKTYPE_MATCHING_MIN is the lowest such value; LINKTYPE_MATCHING_MAX 159 * is the highest such value. 160 */ 161 #define LINKTYPE_MATCHING_MIN 104 /* lowest value in the "matching" range */ 162 163 #define LINKTYPE_C_HDLC 104 /* Cisco HDLC */ 164 #define LINKTYPE_IEEE802_11 105 /* IEEE 802.11 (wireless) */ 165 #define LINKTYPE_ATM_CLIP 106 /* Linux Classical IP over ATM */ 166 #define LINKTYPE_FRELAY 107 /* Frame Relay */ 167 #define LINKTYPE_LOOP 108 /* OpenBSD loopback */ 168 #define LINKTYPE_ENC 109 /* OpenBSD IPSEC enc */ 169 170 /* 171 * These three types are reserved for future use. 172 */ 173 #define LINKTYPE_LANE8023 110 /* ATM LANE + 802.3 */ 174 #define LINKTYPE_HIPPI 111 /* NetBSD HIPPI */ 175 #define LINKTYPE_HDLC 112 /* NetBSD HDLC framing */ 176 177 #define LINKTYPE_LINUX_SLL 113 /* Linux cooked socket capture */ 178 #define LINKTYPE_LTALK 114 /* Apple LocalTalk hardware */ 179 #define LINKTYPE_ECONET 115 /* Acorn Econet */ 180 181 /* 182 * Reserved for use with OpenBSD ipfilter. 183 */ 184 #define LINKTYPE_IPFILTER 116 185 186 #define LINKTYPE_PFLOG 117 /* OpenBSD DLT_PFLOG */ 187 #define LINKTYPE_CISCO_IOS 118 /* For Cisco-internal use */ 188 #define LINKTYPE_IEEE802_11_PRISM 119 /* 802.11 plus Prism II monitor mode radio metadata header */ 189 #define LINKTYPE_IEEE802_11_AIRONET 120 /* 802.11 plus FreeBSD Aironet driver radio metadata header */ 190 191 /* 192 * Reserved for Siemens HiPath HDLC. 193 */ 194 #define LINKTYPE_HHDLC 121 195 196 #define LINKTYPE_IP_OVER_FC 122 /* RFC 2625 IP-over-Fibre Channel */ 197 #define LINKTYPE_SUNATM 123 /* Solaris+SunATM */ 198 199 /* 200 * Reserved as per request from Kent Dahlgren <kent@praesum.com> 201 * for private use. 202 */ 203 #define LINKTYPE_RIO 124 /* RapidIO */ 204 #define LINKTYPE_PCI_EXP 125 /* PCI Express */ 205 #define LINKTYPE_AURORA 126 /* Xilinx Aurora link layer */ 206 207 #define LINKTYPE_IEEE802_11_RADIOTAP 127 /* 802.11 plus radiotap radio metadata header */ 208 209 /* 210 * Reserved for the TZSP encapsulation, as per request from 211 * Chris Waters <chris.waters@networkchemistry.com> 212 * TZSP is a generic encapsulation for any other link type, 213 * which includes a means to include meta-information 214 * with the packet, e.g. signal strength and channel 215 * for 802.11 packets. 216 */ 217 #define LINKTYPE_TZSP 128 /* Tazmen Sniffer Protocol */ 218 219 #define LINKTYPE_ARCNET_LINUX 129 /* Linux-style headers */ 220 221 /* 222 * Juniper-private data link types, as per request from 223 * Hannes Gredler <hannes@juniper.net>. The corresponding 224 * DLT_s are used for passing on chassis-internal 225 * metainformation such as QOS profiles, etc.. 226 */ 227 #define LINKTYPE_JUNIPER_MLPPP 130 228 #define LINKTYPE_JUNIPER_MLFR 131 229 #define LINKTYPE_JUNIPER_ES 132 230 #define LINKTYPE_JUNIPER_GGSN 133 231 #define LINKTYPE_JUNIPER_MFR 134 232 #define LINKTYPE_JUNIPER_ATM2 135 233 #define LINKTYPE_JUNIPER_SERVICES 136 234 #define LINKTYPE_JUNIPER_ATM1 137 235 236 #define LINKTYPE_APPLE_IP_OVER_IEEE1394 138 /* Apple IP-over-IEEE 1394 cooked header */ 237 238 #define LINKTYPE_MTP2_WITH_PHDR 139 239 #define LINKTYPE_MTP2 140 240 #define LINKTYPE_MTP3 141 241 #define LINKTYPE_SCCP 142 242 243 #define LINKTYPE_DOCSIS 143 /* DOCSIS MAC frames */ 244 245 #define LINKTYPE_LINUX_IRDA 144 /* Linux-IrDA */ 246 247 /* 248 * Reserved for IBM SP switch and IBM Next Federation switch. 249 */ 250 #define LINKTYPE_IBM_SP 145 251 #define LINKTYPE_IBM_SN 146 252 253 /* 254 * Reserved for private use. If you have some link-layer header type 255 * that you want to use within your organization, with the capture files 256 * using that link-layer header type not ever be sent outside your 257 * organization, you can use these values. 258 * 259 * No libpcap release will use these for any purpose, nor will any 260 * tcpdump release use them, either. 261 * 262 * Do *NOT* use these in capture files that you expect anybody not using 263 * your private versions of capture-file-reading tools to read; in 264 * particular, do *NOT* use them in products, otherwise you may find that 265 * people won't be able to use tcpdump, or snort, or Ethereal, or... to 266 * read capture files from your firewall/intrusion detection/traffic 267 * monitoring/etc. appliance, or whatever product uses that LINKTYPE_ value, 268 * and you may also find that the developers of those applications will 269 * not accept patches to let them read those files. 270 * 271 * Also, do not use them if somebody might send you a capture using them 272 * for *their* private type and tools using them for *your* private type 273 * would have to read them. 274 * 275 * Instead, in those cases, ask "tcpdump-workers@lists.tcpdump.org" for a 276 * new DLT_ and LINKTYPE_ value, as per the comment in pcap/bpf.h, and use 277 * the type you're given. 278 */ 279 #define LINKTYPE_USER0 147 280 #define LINKTYPE_USER1 148 281 #define LINKTYPE_USER2 149 282 #define LINKTYPE_USER3 150 283 #define LINKTYPE_USER4 151 284 #define LINKTYPE_USER5 152 285 #define LINKTYPE_USER6 153 286 #define LINKTYPE_USER7 154 287 #define LINKTYPE_USER8 155 288 #define LINKTYPE_USER9 156 289 #define LINKTYPE_USER10 157 290 #define LINKTYPE_USER11 158 291 #define LINKTYPE_USER12 159 292 #define LINKTYPE_USER13 160 293 #define LINKTYPE_USER14 161 294 #define LINKTYPE_USER15 162 295 296 /* 297 * For future use with 802.11 captures - defined by AbsoluteValue 298 * Systems to store a number of bits of link-layer information 299 * including radio information: 300 * 301 * http://www.shaftnet.org/~pizza/software/capturefrm.txt 302 */ 303 #define LINKTYPE_IEEE802_11_AVS 163 /* 802.11 plus AVS radio metadata header */ 304 305 /* 306 * Juniper-private data link type, as per request from 307 * Hannes Gredler <hannes@juniper.net>. The corresponding 308 * DLT_s are used for passing on chassis-internal 309 * metainformation such as QOS profiles, etc.. 310 */ 311 #define LINKTYPE_JUNIPER_MONITOR 164 312 313 /* 314 * BACnet MS/TP frames. 315 */ 316 #define LINKTYPE_BACNET_MS_TP 165 317 318 /* 319 * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>. 320 * 321 * This is used in some OSes to allow a kernel socket filter to distinguish 322 * between incoming and outgoing packets, on a socket intended to 323 * supply pppd with outgoing packets so it can do dial-on-demand and 324 * hangup-on-lack-of-demand; incoming packets are filtered out so they 325 * don't cause pppd to hold the connection up (you don't want random 326 * input packets such as port scans, packets from old lost connections, 327 * etc. to force the connection to stay up). 328 * 329 * The first byte of the PPP header (0xff03) is modified to accommodate 330 * the direction - 0x00 = IN, 0x01 = OUT. 331 */ 332 #define LINKTYPE_PPP_PPPD 166 333 334 /* 335 * Juniper-private data link type, as per request from 336 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 337 * for passing on chassis-internal metainformation such as 338 * QOS profiles, cookies, etc.. 339 */ 340 #define LINKTYPE_JUNIPER_PPPOE 167 341 #define LINKTYPE_JUNIPER_PPPOE_ATM 168 342 343 #define LINKTYPE_GPRS_LLC 169 /* GPRS LLC */ 344 #define LINKTYPE_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */ 345 #define LINKTYPE_GPF_F 171 /* GPF-F (ITU-T G.7041/Y.1303) */ 346 347 /* 348 * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line 349 * monitoring equipment. 350 */ 351 #define LINKTYPE_GCOM_T1E1 172 352 #define LINKTYPE_GCOM_SERIAL 173 353 354 /* 355 * Juniper-private data link type, as per request from 356 * Hannes Gredler <hannes@juniper.net>. The DLT_ is used 357 * for internal communication to Physical Interface Cards (PIC) 358 */ 359 #define LINKTYPE_JUNIPER_PIC_PEER 174 360 361 /* 362 * Link types requested by Gregor Maier <gregor@endace.com> of Endace 363 * Measurement Systems. They add an ERF header (see 364 * https://www.endace.com/support/EndaceRecordFormat.pdf) in front of 365 * the link-layer header. 366 */ 367 #define LINKTYPE_ERF_ETH 175 /* Ethernet */ 368 #define LINKTYPE_ERF_POS 176 /* Packet-over-SONET */ 369 370 /* 371 * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD 372 * for vISDN (http://www.orlandi.com/visdn/). Its link-layer header 373 * includes additional information before the LAPD header, so it's 374 * not necessarily a generic LAPD header. 375 */ 376 #define LINKTYPE_LINUX_LAPD 177 377 378 /* 379 * Juniper-private data link type, as per request from 380 * Hannes Gredler <hannes@juniper.net>. 381 * The Link Types are used for prepending meta-information 382 * like interface index, interface name 383 * before standard Ethernet, PPP, Frelay & C-HDLC Frames 384 */ 385 #define LINKTYPE_JUNIPER_ETHER 178 386 #define LINKTYPE_JUNIPER_PPP 179 387 #define LINKTYPE_JUNIPER_FRELAY 180 388 #define LINKTYPE_JUNIPER_CHDLC 181 389 390 /* 391 * Multi Link Frame Relay (FRF.16) 392 */ 393 #define LINKTYPE_MFR 182 394 395 /* 396 * Juniper-private data link type, as per request from 397 * Hannes Gredler <hannes@juniper.net>. 398 * The DLT_ is used for internal communication with a 399 * voice Adapter Card (PIC) 400 */ 401 #define LINKTYPE_JUNIPER_VP 183 402 403 /* 404 * Arinc 429 frames. 405 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 406 * Every frame contains a 32bit A429 label. 407 * More documentation on Arinc 429 can be found at 408 * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf 409 */ 410 #define LINKTYPE_A429 184 411 412 /* 413 * Arinc 653 Interpartition Communication messages. 414 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 415 * Please refer to the A653-1 standard for more information. 416 */ 417 #define LINKTYPE_A653_ICM 185 418 419 /* 420 * This used to be "USB packets, beginning with a USB setup header; 421 * requested by Paolo Abeni <paolo.abeni@email.it>." 422 * 423 * However, that header didn't work all that well - it left out some 424 * useful information - and was abandoned in favor of the DLT_USB_LINUX 425 * header. 426 * 427 * This is now used by FreeBSD for its BPF taps for USB; that has its 428 * own headers. So it is written, so it is done. 429 */ 430 #define LINKTYPE_USB_FREEBSD 186 431 432 /* 433 * Bluetooth HCI UART transport layer (part H:4); requested by 434 * Paolo Abeni. 435 */ 436 #define LINKTYPE_BLUETOOTH_HCI_H4 187 437 438 /* 439 * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz 440 * <cruz_petagay@bah.com>. 441 */ 442 #define LINKTYPE_IEEE802_16_MAC_CPS 188 443 444 /* 445 * USB packets, beginning with a Linux USB header; requested by 446 * Paolo Abeni <paolo.abeni@email.it>. 447 */ 448 #define LINKTYPE_USB_LINUX 189 449 450 /* 451 * Controller Area Network (CAN) v. 2.0B packets. 452 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 453 * Used to dump CAN packets coming from a CAN Vector board. 454 * More documentation on the CAN v2.0B frames can be found at 455 * http://www.can-cia.org/downloads/?269 456 */ 457 #define LINKTYPE_CAN20B 190 458 459 /* 460 * IEEE 802.15.4, with address fields padded, as is done by Linux 461 * drivers; requested by Juergen Schimmer. 462 */ 463 #define LINKTYPE_IEEE802_15_4_LINUX 191 464 465 /* 466 * Per Packet Information encapsulated packets. 467 * LINKTYPE_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 468 */ 469 #define LINKTYPE_PPI 192 470 471 /* 472 * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header; 473 * requested by Charles Clancy. 474 */ 475 #define LINKTYPE_IEEE802_16_MAC_CPS_RADIO 193 476 477 /* 478 * Juniper-private data link type, as per request from 479 * Hannes Gredler <hannes@juniper.net>. 480 * The DLT_ is used for internal communication with a 481 * integrated service module (ISM). 482 */ 483 #define LINKTYPE_JUNIPER_ISM 194 484 485 /* 486 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 487 * nothing), and with the FCS at the end of the frame; requested by 488 * Mikko Saarnivala <mikko.saarnivala@sensinode.com>. 489 * 490 * This should only be used if the FCS is present at the end of the 491 * frame; if the frame has no FCS, DLT_IEEE802_15_4_NOFCS should be 492 * used. 493 */ 494 #define LINKTYPE_IEEE802_15_4_WITHFCS 195 495 496 /* 497 * Various link-layer types, with a pseudo-header, for SITA 498 * (https://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com). 499 */ 500 #define LINKTYPE_SITA 196 501 502 /* 503 * Various link-layer types, with a pseudo-header, for Endace DAG cards; 504 * encapsulates Endace ERF records. Requested by Stephen Donnelly 505 * <stephen@endace.com>. 506 */ 507 #define LINKTYPE_ERF 197 508 509 /* 510 * Special header prepended to Ethernet packets when capturing from a 511 * u10 Networks board. Requested by Phil Mulholland 512 * <phil@u10networks.com>. 513 */ 514 #define LINKTYPE_RAIF1 198 515 516 /* 517 * IPMB packet for IPMI, beginning with a 2-byte header, followed by 518 * the I2C slave address, followed by the netFn and LUN, etc.. 519 * Requested by Chanthy Toeung <chanthy.toeung@ca.kontron.com>. 520 * 521 * XXX - its DLT_ value used to be called DLT_IPMB, back when we got the 522 * impression from the email thread requesting it that the packet 523 * had no extra 2-byte header. We've renamed it; if anybody used 524 * DLT_IPMB and assumed no 2-byte header, this will cause the compile 525 * to fail, at which point we'll have to figure out what to do about 526 * the two header types using the same DLT_/LINKTYPE_ value. If that 527 * doesn't happen, we'll assume nobody used it and that the redefinition 528 * is safe. 529 */ 530 #define LINKTYPE_IPMB_KONTRON 199 531 532 /* 533 * Juniper-private data link type, as per request from 534 * Hannes Gredler <hannes@juniper.net>. 535 * The DLT_ is used for capturing data on a secure tunnel interface. 536 */ 537 #define LINKTYPE_JUNIPER_ST 200 538 539 /* 540 * Bluetooth HCI UART transport layer (part H:4), with pseudo-header 541 * that includes direction information; requested by Paolo Abeni. 542 */ 543 #define LINKTYPE_BLUETOOTH_HCI_H4_WITH_PHDR 201 544 545 /* 546 * AX.25 packet with a 1-byte KISS header; see 547 * 548 * http://www.ax25.net/kiss.htm 549 * 550 * as per Richard Stearn <richard@rns-stearn.demon.co.uk>. 551 */ 552 #define LINKTYPE_AX25_KISS 202 553 554 /* 555 * LAPD packets from an ISDN channel, starting with the address field, 556 * with no pseudo-header. 557 * Requested by Varuna De Silva <varunax@gmail.com>. 558 */ 559 #define LINKTYPE_LAPD 203 560 561 /* 562 * PPP, with a one-byte direction pseudo-header prepended - zero means 563 * "received by this host", non-zero (any non-zero value) means "sent by 564 * this host" - as per Will Barker <w.barker@zen.co.uk>. 565 */ 566 #define LINKTYPE_PPP_WITH_DIR 204 /* Don't confuse with LINKTYPE_PPP_PPPD */ 567 568 /* 569 * Cisco HDLC, with a one-byte direction pseudo-header prepended - zero 570 * means "received by this host", non-zero (any non-zero value) means 571 * "sent by this host" - as per Will Barker <w.barker@zen.co.uk>. 572 */ 573 #define LINKTYPE_C_HDLC_WITH_DIR 205 /* Cisco HDLC */ 574 575 /* 576 * Frame Relay, with a one-byte direction pseudo-header prepended - zero 577 * means "received by this host" (DCE -> DTE), non-zero (any non-zero 578 * value) means "sent by this host" (DTE -> DCE) - as per Will Barker 579 * <w.barker@zen.co.uk>. 580 */ 581 #define LINKTYPE_FRELAY_WITH_DIR 206 /* Frame Relay */ 582 583 /* 584 * LAPB, with a one-byte direction pseudo-header prepended - zero means 585 * "received by this host" (DCE -> DTE), non-zero (any non-zero value) 586 * means "sent by this host" (DTE -> DCE)- as per Will Barker 587 * <w.barker@zen.co.uk>. 588 */ 589 #define LINKTYPE_LAPB_WITH_DIR 207 /* LAPB */ 590 591 /* 592 * 208 is reserved for an as-yet-unspecified proprietary link-layer 593 * type, as requested by Will Barker. 594 */ 595 596 /* 597 * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman 598 * <avn@pigeonpoint.com>. 599 */ 600 #define LINKTYPE_IPMB_LINUX 209 601 602 /* 603 * FlexRay automotive bus - http://www.flexray.com/ - as requested 604 * by Hannes Kaelber <hannes.kaelber@x2e.de>. 605 */ 606 #define LINKTYPE_FLEXRAY 210 607 608 /* 609 * Media Oriented Systems Transport (MOST) bus for multimedia 610 * transport - https://www.mostcooperation.com/ - as requested 611 * by Hannes Kaelber <hannes.kaelber@x2e.de>. 612 */ 613 #define LINKTYPE_MOST 211 614 615 /* 616 * Local Interconnect Network (LIN) bus for vehicle networks - 617 * http://www.lin-subbus.org/ - as requested by Hannes Kaelber 618 * <hannes.kaelber@x2e.de>. 619 */ 620 #define LINKTYPE_LIN 212 621 622 /* 623 * X2E-private data link type used for serial line capture, 624 * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. 625 */ 626 #define LINKTYPE_X2E_SERIAL 213 627 628 /* 629 * X2E-private data link type used for the Xoraya data logger 630 * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. 631 */ 632 #define LINKTYPE_X2E_XORAYA 214 633 634 /* 635 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 636 * nothing), but with the PHY-level data for non-ASK PHYs (4 octets 637 * of 0 as preamble, one octet of SFD, one octet of frame length+ 638 * reserved bit, and then the MAC-layer data, starting with the 639 * frame control field). 640 * 641 * Requested by Max Filippov <jcmvbkbc@gmail.com>. 642 */ 643 #define LINKTYPE_IEEE802_15_4_NONASK_PHY 215 644 645 /* 646 * David Gibson <david@gibson.dropbear.id.au> requested this for 647 * captures from the Linux kernel /dev/input/eventN devices. This 648 * is used to communicate keystrokes and mouse movements from the 649 * Linux kernel to display systems, such as Xorg. 650 */ 651 #define LINKTYPE_LINUX_EVDEV 216 652 653 /* 654 * GSM Um and Abis interfaces, preceded by a "gsmtap" header. 655 * 656 * Requested by Harald Welte <laforge@gnumonks.org>. 657 */ 658 #define LINKTYPE_GSMTAP_UM 217 659 #define LINKTYPE_GSMTAP_ABIS 218 660 661 /* 662 * MPLS, with an MPLS label as the link-layer header. 663 * Requested by Michele Marchetto <michele@openbsd.org> on behalf 664 * of OpenBSD. 665 */ 666 #define LINKTYPE_MPLS 219 667 668 /* 669 * USB packets, beginning with a Linux USB header, with the USB header 670 * padded to 64 bytes; required for memory-mapped access. 671 */ 672 #define LINKTYPE_USB_LINUX_MMAPPED 220 673 674 /* 675 * DECT packets, with a pseudo-header; requested by 676 * Matthias Wenzel <tcpdump@mazzoo.de>. 677 */ 678 #define LINKTYPE_DECT 221 679 680 /* 681 * From: "Lidwa, Eric (GSFC-582.0)[SGT INC]" <eric.lidwa-1@nasa.gov> 682 * Date: Mon, 11 May 2009 11:18:30 -0500 683 * 684 * DLT_AOS. We need it for AOS Space Data Link Protocol. 685 * I have already written dissectors for but need an OK from 686 * legal before I can submit a patch. 687 * 688 */ 689 #define LINKTYPE_AOS 222 690 691 /* 692 * Wireless HART (Highway Addressable Remote Transducer) 693 * From the HART Communication Foundation 694 * IES/PAS 62591 695 * 696 * Requested by Sam Roberts <vieuxtech@gmail.com>. 697 */ 698 #define LINKTYPE_WIHART 223 699 700 /* 701 * Fibre Channel FC-2 frames, beginning with a Frame_Header. 702 * Requested by Kahou Lei <kahou82@gmail.com>. 703 */ 704 #define LINKTYPE_FC_2 224 705 706 /* 707 * Fibre Channel FC-2 frames, beginning with an encoding of the 708 * SOF, and ending with an encoding of the EOF. 709 * 710 * The encodings represent the frame delimiters as 4-byte sequences 711 * representing the corresponding ordered sets, with K28.5 712 * represented as 0xBC, and the D symbols as the corresponding 713 * byte values; for example, SOFi2, which is K28.5 - D21.5 - D1.2 - D21.2, 714 * is represented as 0xBC 0xB5 0x55 0x55. 715 * 716 * Requested by Kahou Lei <kahou82@gmail.com>. 717 */ 718 #define LINKTYPE_FC_2_WITH_FRAME_DELIMS 225 719 720 /* 721 * Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>. 722 * 723 * The pseudo-header starts with a one-byte version number; for version 2, 724 * the pseudo-header is: 725 * 726 * struct dl_ipnetinfo { 727 * uint8_t dli_version; 728 * uint8_t dli_family; 729 * uint16_t dli_htype; 730 * uint32_t dli_pktlen; 731 * uint32_t dli_ifindex; 732 * uint32_t dli_grifindex; 733 * uint32_t dli_zsrc; 734 * uint32_t dli_zdst; 735 * }; 736 * 737 * dli_version is 2 for the current version of the pseudo-header. 738 * 739 * dli_family is a Solaris address family value, so it's 2 for IPv4 740 * and 26 for IPv6. 741 * 742 * dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing 743 * packets, and 2 for packets arriving from another zone on the same 744 * machine. 745 * 746 * dli_pktlen is the length of the packet data following the pseudo-header 747 * (so the captured length minus dli_pktlen is the length of the 748 * pseudo-header, assuming the entire pseudo-header was captured). 749 * 750 * dli_ifindex is the interface index of the interface on which the 751 * packet arrived. 752 * 753 * dli_grifindex is the group interface index number (for IPMP interfaces). 754 * 755 * dli_zsrc is the zone identifier for the source of the packet. 756 * 757 * dli_zdst is the zone identifier for the destination of the packet. 758 * 759 * A zone number of 0 is the global zone; a zone number of 0xffffffff 760 * means that the packet arrived from another host on the network, not 761 * from another zone on the same machine. 762 * 763 * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates 764 * which of those it is. 765 */ 766 #define LINKTYPE_IPNET 226 767 768 /* 769 * CAN (Controller Area Network) frames, with a pseudo-header as supplied 770 * by Linux SocketCAN, and with multi-byte numerical fields in that header 771 * in big-endian byte order. 772 * 773 * See Documentation/networking/can.txt in the Linux source. 774 * 775 * Requested by Felix Obenhuber <felix@obenhuber.de>. 776 */ 777 #define LINKTYPE_CAN_SOCKETCAN 227 778 779 /* 780 * Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies 781 * whether it's v4 or v6. Requested by Darren Reed <Darren.Reed@Sun.COM>. 782 */ 783 #define LINKTYPE_IPV4 228 784 #define LINKTYPE_IPV6 229 785 786 /* 787 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 788 * nothing), and with no FCS at the end of the frame; requested by 789 * Jon Smirl <jonsmirl@gmail.com>. 790 */ 791 #define LINKTYPE_IEEE802_15_4_NOFCS 230 792 793 /* 794 * Raw D-Bus: 795 * 796 * https://www.freedesktop.org/wiki/Software/dbus 797 * 798 * messages: 799 * 800 * https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages 801 * 802 * starting with the endianness flag, followed by the message type, etc., 803 * but without the authentication handshake before the message sequence: 804 * 805 * https://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol 806 * 807 * Requested by Martin Vidner <martin@vidner.net>. 808 */ 809 #define LINKTYPE_DBUS 231 810 811 /* 812 * Juniper-private data link type, as per request from 813 * Hannes Gredler <hannes@juniper.net>. 814 */ 815 #define LINKTYPE_JUNIPER_VS 232 816 #define LINKTYPE_JUNIPER_SRX_E2E 233 817 #define LINKTYPE_JUNIPER_FIBRECHANNEL 234 818 819 /* 820 * DVB-CI (DVB Common Interface for communication between a PC Card 821 * module and a DVB receiver). See 822 * 823 * https://www.kaiser.cx/pcap-dvbci.html 824 * 825 * for the specification. 826 * 827 * Requested by Martin Kaiser <martin@kaiser.cx>. 828 */ 829 #define LINKTYPE_DVB_CI 235 830 831 /* 832 * Variant of 3GPP TS 27.010 multiplexing protocol. Requested 833 * by Hans-Christoph Schemmel <hans-christoph.schemmel@cinterion.com>. 834 */ 835 #define LINKTYPE_MUX27010 236 836 837 /* 838 * STANAG 5066 D_PDUs. Requested by M. Baris Demiray 839 * <barisdemiray@gmail.com>. 840 */ 841 #define LINKTYPE_STANAG_5066_D_PDU 237 842 843 /* 844 * Juniper-private data link type, as per request from 845 * Hannes Gredler <hannes@juniper.net>. 846 */ 847 #define LINKTYPE_JUNIPER_ATM_CEMIC 238 848 849 /* 850 * NetFilter LOG messages 851 * (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets) 852 * 853 * Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl> 854 */ 855 #define LINKTYPE_NFLOG 239 856 857 /* 858 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type 859 * for Ethernet packets with a 4-byte pseudo-header and always 860 * with the payload including the FCS, as supplied by their 861 * netANALYZER hardware and software. 862 * 863 * Requested by Holger P. Frommer <HPfrommer@hilscher.com> 864 */ 865 #define LINKTYPE_NETANALYZER 240 866 867 /* 868 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type 869 * for Ethernet packets with a 4-byte pseudo-header and FCS and 870 * 1 byte of SFD, as supplied by their netANALYZER hardware and 871 * software. 872 * 873 * Requested by Holger P. Frommer <HPfrommer@hilscher.com> 874 */ 875 #define LINKTYPE_NETANALYZER_TRANSPARENT 241 876 877 /* 878 * IP-over-InfiniBand, as specified by RFC 4391. 879 * 880 * Requested by Petr Sumbera <petr.sumbera@oracle.com>. 881 */ 882 #define LINKTYPE_IPOIB 242 883 884 /* 885 * MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0). 886 * 887 * Requested by Guy Martin <gmsoft@tuxicoman.be>. 888 */ 889 #define LINKTYPE_MPEG_2_TS 243 890 891 /* 892 * ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as 893 * used by their ng40 protocol tester. 894 * 895 * Requested by Jens Grimmer <jens.grimmer@ng4t.com>. 896 */ 897 #define LINKTYPE_NG40 244 898 899 /* 900 * Pseudo-header giving adapter number and flags, followed by an NFC 901 * (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU, 902 * as specified by NFC Forum Logical Link Control Protocol Technical 903 * Specification LLCP 1.1. 904 * 905 * Requested by Mike Wakerly <mikey@google.com>. 906 */ 907 #define LINKTYPE_NFC_LLCP 245 908 909 /* 910 * pfsync output; DLT_PFSYNC is 18, which collides with DLT_CIP in 911 * SuSE 6.3, on OpenBSD, NetBSD, DragonFly BSD, and macOS, and 912 * is 121, which collides with DLT_HHDLC, in FreeBSD. We pick a 913 * shiny new link-layer header type value that doesn't collide with 914 * anything, in the hopes that future pfsync savefiles, if any, 915 * won't require special hacks to distinguish from other savefiles. 916 * 917 */ 918 #define LINKTYPE_PFSYNC 246 919 920 /* 921 * Raw InfiniBand packets, starting with the Local Routing Header. 922 * 923 * Requested by Oren Kladnitsky <orenk@mellanox.com>. 924 */ 925 #define LINKTYPE_INFINIBAND 247 926 927 /* 928 * SCTP, with no lower-level protocols (i.e., no IPv4 or IPv6). 929 * 930 * Requested by Michael Tuexen <Michael.Tuexen@lurchi.franken.de>. 931 */ 932 #define LINKTYPE_SCTP 248 933 934 /* 935 * USB packets, beginning with a USBPcap header. 936 * 937 * Requested by Tomasz Mon <desowin@gmail.com> 938 */ 939 #define LINKTYPE_USBPCAP 249 940 941 /* 942 * Schweitzer Engineering Laboratories "RTAC" product serial-line 943 * packets. 944 * 945 * Requested by Chris Bontje <chris_bontje@selinc.com>. 946 */ 947 #define LINKTYPE_RTAC_SERIAL 250 948 949 /* 950 * Bluetooth Low Energy air interface link-layer packets. 951 * 952 * Requested by Mike Kershaw <dragorn@kismetwireless.net>. 953 */ 954 #define LINKTYPE_BLUETOOTH_LE_LL 251 955 956 /* 957 * Link-layer header type for upper-protocol layer PDU saves from wireshark. 958 * 959 * the actual contents are determined by two TAGs stored with each 960 * packet: 961 * EXP_PDU_TAG_LINKTYPE the link type (LINKTYPE_ value) of the 962 * original packet. 963 * 964 * EXP_PDU_TAG_PROTO_NAME the name of the wireshark dissector 965 * that can make sense of the data stored. 966 */ 967 #define LINKTYPE_WIRESHARK_UPPER_PDU 252 968 969 /* 970 * Link-layer header type for the netlink protocol (nlmon devices). 971 */ 972 #define LINKTYPE_NETLINK 253 973 974 /* 975 * Bluetooth Linux Monitor headers for the BlueZ stack. 976 */ 977 #define LINKTYPE_BLUETOOTH_LINUX_MONITOR 254 978 979 /* 980 * Bluetooth Basic Rate/Enhanced Data Rate baseband packets, as 981 * captured by Ubertooth. 982 */ 983 #define LINKTYPE_BLUETOOTH_BREDR_BB 255 984 985 /* 986 * Bluetooth Low Energy link layer packets, as captured by Ubertooth. 987 */ 988 #define LINKTYPE_BLUETOOTH_LE_LL_WITH_PHDR 256 989 990 /* 991 * PROFIBUS data link layer. 992 */ 993 #define LINKTYPE_PROFIBUS_DL 257 994 995 /* 996 * Apple's DLT_PKTAP headers. 997 * 998 * Sadly, the folks at Apple either had no clue that the DLT_USERn values 999 * are for internal use within an organization and partners only, and 1000 * didn't know that the right way to get a link-layer header type is to 1001 * ask tcpdump.org for one, or knew and didn't care, so they just 1002 * used DLT_USER2, which causes problems for everything except for 1003 * their version of tcpdump. 1004 * 1005 * So I'll just give them one; hopefully this will show up in a 1006 * libpcap release in time for them to get this into 10.10 Big Sur 1007 * or whatever Mavericks' successor is called. LINKTYPE_PKTAP 1008 * will be 258 *even on macOS*; that is *intentional*, so that 1009 * PKTAP files look the same on *all* OSes (different OSes can have 1010 * different numerical values for a given DLT_, but *MUST NOT* have 1011 * different values for what goes in a file, as files can be moved 1012 * between OSes!). 1013 */ 1014 #define LINKTYPE_PKTAP 258 1015 1016 /* 1017 * Ethernet packets preceded by a header giving the last 6 octets 1018 * of the preamble specified by 802.3-2012 Clause 65, section 1019 * 65.1.3.2 "Transmit". 1020 */ 1021 #define LINKTYPE_EPON 259 1022 1023 /* 1024 * IPMI trace packets, as specified by Table 3-20 "Trace Data Block Format" 1025 * in the PICMG HPM.2 specification. 1026 */ 1027 #define LINKTYPE_IPMI_HPM_2 260 1028 1029 /* 1030 * per Joshua Wright <jwright@hasborg.com>, formats for Zwave captures. 1031 */ 1032 #define LINKTYPE_ZWAVE_R1_R2 261 1033 #define LINKTYPE_ZWAVE_R3 262 1034 1035 /* 1036 * per Steve Karg <skarg@users.sourceforge.net>, formats for Wattstopper 1037 * Digital Lighting Management room bus serial protocol captures. 1038 */ 1039 #define LINKTYPE_WATTSTOPPER_DLM 263 1040 1041 /* 1042 * ISO 14443 contactless smart card messages. 1043 */ 1044 #define LINKTYPE_ISO_14443 264 1045 1046 /* 1047 * Radio data system (RDS) groups. IEC 62106. 1048 * Per Jonathan Brucker <jonathan.brucke@gmail.com>. 1049 */ 1050 #define LINKTYPE_RDS 265 1051 1052 /* 1053 * USB packets, beginning with a Darwin (macOS, etc.) header. 1054 */ 1055 #define LINKTYPE_USB_DARWIN 266 1056 1057 /* 1058 * OpenBSD DLT_OPENFLOW. 1059 */ 1060 #define LINKTYPE_OPENFLOW 267 1061 1062 /* 1063 * SDLC frames containing SNA PDUs. 1064 */ 1065 #define LINKTYPE_SDLC 268 1066 1067 /* 1068 * per "Selvig, Bjorn" <b.selvig@ti.com> used for 1069 * TI protocol sniffer. 1070 */ 1071 #define LINKTYPE_TI_LLN_SNIFFER 269 1072 1073 /* 1074 * per: Erik de Jong <erikdejong at gmail.com> for 1075 * https://github.com/eriknl/LoRaTap/releases/tag/v0.1 1076 */ 1077 #define LINKTYPE_LORATAP 270 1078 1079 /* 1080 * per: Stefanha at gmail.com for 1081 * https://lists.sandelman.ca/pipermail/tcpdump-workers/2017-May/000772.html 1082 * and: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/vsockmon.h 1083 * for: https://qemu-project.org/Features/VirtioVsock 1084 */ 1085 #define LINKTYPE_VSOCK 271 1086 1087 /* 1088 * Nordic Semiconductor Bluetooth LE sniffer. 1089 */ 1090 #define LINKTYPE_NORDIC_BLE 272 1091 1092 /* 1093 * Excentis DOCSIS 3.1 RF sniffer (XRA-31) 1094 * per: bruno.verstuyft at excentis.com 1095 * https://www.xra31.com/xra-header 1096 */ 1097 #define LINKTYPE_DOCSIS31_XRA31 273 1098 1099 /* 1100 * mPackets, as specified by IEEE 802.3br Figure 99-4, starting 1101 * with the preamble and always ending with a CRC field. 1102 */ 1103 #define LINKTYPE_ETHERNET_MPACKET 274 1104 1105 /* 1106 * DisplayPort AUX channel monitoring data as specified by VESA 1107 * DisplayPort(DP) Standard preceded by a pseudo-header. 1108 * per dirk.eibach at gdsys.cc 1109 */ 1110 #define LINKTYPE_DISPLAYPORT_AUX 275 1111 1112 /* 1113 * Linux cooked sockets v2. 1114 */ 1115 #define LINKTYPE_LINUX_SLL2 276 1116 1117 /* 1118 * Sercos Monitor, per Manuel Jacob <manuel.jacob at steinbeis-stg.de> 1119 */ 1120 #define LINKTYPE_SERCOS_MONITOR 277 1121 1122 /* 1123 * OpenVizsla http://openvizsla.org is open source USB analyzer hardware. 1124 * It consists of FPGA with attached USB phy and FTDI chip for streaming 1125 * the data to the host PC. 1126 * 1127 * Current OpenVizsla data encapsulation format is described here: 1128 * https://github.com/matwey/libopenvizsla/wiki/OpenVizsla-protocol-description 1129 * 1130 */ 1131 #define LINKTYPE_OPENVIZSLA 278 1132 1133 /* 1134 * The Elektrobit High Speed Capture and Replay (EBHSCR) protocol is produced 1135 * by a PCIe Card for interfacing high speed automotive interfaces. 1136 * 1137 * The specification for this frame format can be found at: 1138 * https://www.elektrobit.com/ebhscr 1139 * 1140 * for Guenter.Ebermann at elektrobit.com 1141 * 1142 */ 1143 #define LINKTYPE_EBHSCR 279 1144 1145 /* 1146 * The https://fd.io vpp graph dispatch tracer produces pcap trace files 1147 * in the format documented here: 1148 * https://fdio-vpp.readthedocs.io/en/latest/gettingstarted/developers/vnet.html#graph-dispatcher-pcap-tracing 1149 */ 1150 #define LINKTYPE_VPP_DISPATCH 280 1151 1152 /* 1153 * Broadcom Ethernet switches (ROBO switch) 4 bytes proprietary tagging format. 1154 */ 1155 #define LINKTYPE_DSA_TAG_BRCM 281 1156 #define LINKTYPE_DSA_TAG_BRCM_PREPEND 282 1157 1158 /* 1159 * IEEE 802.15.4 with pseudo-header and optional meta-data TLVs, PHY payload 1160 * exactly as it appears in the spec (no padding, no nothing), and FCS if 1161 * specified by FCS Type TLV; requested by James Ko <jck@exegin.com>. 1162 * Specification at https://github.com/jkcko/ieee802.15.4-tap 1163 */ 1164 #define LINKTYPE_IEEE802_15_4_TAP 283 1165 1166 /* 1167 * Marvell (Ethertype) Distributed Switch Architecture proprietary tagging format. 1168 */ 1169 #define LINKTYPE_DSA_TAG_DSA 284 1170 #define LINKTYPE_DSA_TAG_EDSA 285 1171 1172 /* 1173 * Payload of lawful intercept packets using the ELEE protocol; 1174 * https://socket.hr/draft-dfranusic-opsawg-elee-00.xml 1175 * https://xml2rfc.tools.ietf.org/cgi-bin/xml2rfc.cgi?url=https://socket.hr/draft-dfranusic-opsawg-elee-00.xml&modeAsFormat=html/ascii 1176 */ 1177 #define LINKTYPE_ELEE 286 1178 1179 /* 1180 * Serial frames transmitted between a host and a Z-Wave chip. 1181 */ 1182 #define LINKTYPE_Z_WAVE_SERIAL 287 1183 1184 /* 1185 * USB 2.0, 1.1, and 1.0 packets as transmitted over the cable. 1186 */ 1187 #define LINKTYPE_USB_2_0 288 1188 1189 /* 1190 * ATSC Link-Layer Protocol (A/330) packets. 1191 */ 1192 #define LINKTYPE_ATSC_ALP 289 1193 1194 #define LINKTYPE_MATCHING_MAX 289 /* highest value in the "matching" range */ 1195 1196 /* 1197 * The DLT_ and LINKTYPE_ values in the "matching" range should be the 1198 * same, so DLT_MATCHING_MAX and LINKTYPE_MATCHING_MAX should be the 1199 * same. 1200 */ 1201 #if LINKTYPE_MATCHING_MAX != DLT_MATCHING_MAX 1202 #error The LINKTYPE_ matching range does not match the DLT_ matching range 1203 #endif 1204 1205 static struct linktype_map { 1206 int dlt; 1207 int linktype; 1208 } map[] = { 1209 /* 1210 * These DLT_* codes have LINKTYPE_* codes with values identical 1211 * to the values of the corresponding DLT_* code. 1212 */ 1213 { DLT_NULL, LINKTYPE_NULL }, 1214 { DLT_EN10MB, LINKTYPE_ETHERNET }, 1215 { DLT_EN3MB, LINKTYPE_EXP_ETHERNET }, 1216 { DLT_AX25, LINKTYPE_AX25 }, 1217 { DLT_PRONET, LINKTYPE_PRONET }, 1218 { DLT_CHAOS, LINKTYPE_CHAOS }, 1219 { DLT_IEEE802, LINKTYPE_IEEE802_5 }, 1220 { DLT_ARCNET, LINKTYPE_ARCNET_BSD }, 1221 { DLT_SLIP, LINKTYPE_SLIP }, 1222 { DLT_PPP, LINKTYPE_PPP }, 1223 { DLT_FDDI, LINKTYPE_FDDI }, 1224 { DLT_SYMANTEC_FIREWALL, LINKTYPE_SYMANTEC_FIREWALL }, 1225 1226 /* 1227 * These DLT_* codes have different values on different 1228 * platforms; we map them to LINKTYPE_* codes that 1229 * have values that should never be equal to any DLT_* 1230 * code. 1231 */ 1232 #ifdef DLT_FR 1233 /* BSD/OS Frame Relay */ 1234 { DLT_FR, LINKTYPE_FRELAY }, 1235 #endif 1236 1237 { DLT_ATM_RFC1483, LINKTYPE_ATM_RFC1483 }, 1238 { DLT_RAW, LINKTYPE_RAW }, 1239 { DLT_SLIP_BSDOS, LINKTYPE_SLIP_BSDOS }, 1240 { DLT_PPP_BSDOS, LINKTYPE_PPP_BSDOS }, 1241 1242 /* BSD/OS Cisco HDLC */ 1243 { DLT_C_HDLC, LINKTYPE_C_HDLC }, 1244 1245 /* 1246 * These DLT_* codes are not on all platforms, but, so far, 1247 * there don't appear to be any platforms that define 1248 * other codes with those values; we map them to 1249 * different LINKTYPE_* values anyway, just in case. 1250 */ 1251 1252 /* Linux ATM Classical IP */ 1253 { DLT_ATM_CLIP, LINKTYPE_ATM_CLIP }, 1254 1255 /* NetBSD sync/async serial PPP (or Cisco HDLC) */ 1256 { DLT_PPP_SERIAL, LINKTYPE_PPP_HDLC }, 1257 1258 /* NetBSD PPP over Ethernet */ 1259 { DLT_PPP_ETHER, LINKTYPE_PPP_ETHER }, 1260 1261 /* 1262 * All LINKTYPE_ values between LINKTYPE_MATCHING_MIN 1263 * and LINKTYPE_MATCHING_MAX are mapped to identical 1264 * DLT_ values. 1265 */ 1266 1267 { -1, -1 } 1268 }; 1269 1270 int 1271 dlt_to_linktype(int dlt) 1272 { 1273 int i; 1274 1275 /* 1276 * DLTs that, on some platforms, have values in the matching range 1277 * but that *don't* have the same value as the corresponding 1278 * LINKTYPE because, for some reason, not all OSes have the 1279 * same value for that DLT (note that the DLT's value might be 1280 * outside the matching range on some of those OSes). 1281 */ 1282 if (dlt == DLT_PFSYNC) 1283 return (LINKTYPE_PFSYNC); 1284 if (dlt == DLT_PKTAP) 1285 return (LINKTYPE_PKTAP); 1286 1287 /* 1288 * For all other values in the matching range, the DLT 1289 * value is the same as the LINKTYPE value. 1290 */ 1291 if (dlt >= DLT_MATCHING_MIN && dlt <= DLT_MATCHING_MAX) 1292 return (dlt); 1293 1294 /* 1295 * Map the values outside that range. 1296 */ 1297 for (i = 0; map[i].dlt != -1; i++) { 1298 if (map[i].dlt == dlt) 1299 return (map[i].linktype); 1300 } 1301 1302 /* 1303 * If we don't have a mapping for this DLT, return an 1304 * error; that means that this is a value with no corresponding 1305 * LINKTYPE, and we need to assign one. 1306 */ 1307 return (-1); 1308 } 1309 1310 int 1311 linktype_to_dlt(int linktype) 1312 { 1313 int i; 1314 1315 /* 1316 * LINKTYPEs in the matching range that *don't* 1317 * have the same value as the corresponding DLTs 1318 * because, for some reason, not all OSes have the 1319 * same value for that DLT. 1320 */ 1321 if (linktype == LINKTYPE_PFSYNC) 1322 return (DLT_PFSYNC); 1323 if (linktype == LINKTYPE_PKTAP) 1324 return (DLT_PKTAP); 1325 1326 /* 1327 * For all other values in the matching range, except for 1328 * LINKTYPE_ATM_CLIP, the LINKTYPE value is the same as 1329 * the DLT value. 1330 * 1331 * LINKTYPE_ATM_CLIP is a special case. DLT_ATM_CLIP is 1332 * not on all platforms, but, so far, there don't appear 1333 * to be any platforms that define it as anything other 1334 * than 19; we define LINKTYPE_ATM_CLIP as something 1335 * other than 19, just in case. That value is in the 1336 * matching range, so we have to check for it. 1337 */ 1338 if (linktype >= LINKTYPE_MATCHING_MIN && 1339 linktype <= LINKTYPE_MATCHING_MAX && 1340 linktype != LINKTYPE_ATM_CLIP) 1341 return (linktype); 1342 1343 /* 1344 * Map the values outside that range. 1345 */ 1346 for (i = 0; map[i].linktype != -1; i++) { 1347 if (map[i].linktype == linktype) 1348 return (map[i].dlt); 1349 } 1350 1351 /* 1352 * If we don't have an entry for this LINKTYPE, return 1353 * the link type value; it may be a DLT from an newer 1354 * version of libpcap. 1355 */ 1356 return linktype; 1357 } 1358 1359 /* 1360 * Return the maximum snapshot length for a given DLT_ value. 1361 * 1362 * For most link-layer types, we use MAXIMUM_SNAPLEN. 1363 * 1364 * For DLT_DBUS, the maximum is 128MiB, as per 1365 * 1366 * https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages 1367 * 1368 * For DLT_EBHSCR, the maximum is 8MiB, as per 1369 * 1370 * https://www.elektrobit.com/ebhscr 1371 * 1372 * For DLT_USBPCAP, the maximum is 1MiB, as per 1373 * 1374 * https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15985 1375 */ 1376 u_int 1377 max_snaplen_for_dlt(int dlt) 1378 { 1379 switch (dlt) { 1380 1381 case DLT_DBUS: 1382 return 128*1024*1024; 1383 1384 case DLT_EBHSCR: 1385 return 8*1024*1024; 1386 1387 case DLT_USBPCAP: 1388 return 1024*1024; 1389 1390 default: 1391 return MAXIMUM_SNAPLEN; 1392 } 1393 } 1394 1395 /* 1396 * DLT_LINUX_SLL packets with a protocol type of LINUX_SLL_P_CAN or 1397 * LINUX_SLL_P_CANFD have SocketCAN headers in front of the payload, 1398 * with the CAN ID being in host byte order. 1399 * 1400 * When reading a DLT_LINUX_SLL capture file, we need to check for those 1401 * packets and convert the CAN ID from the byte order of the host that 1402 * wrote the file to this host's byte order. 1403 */ 1404 static void 1405 swap_linux_sll_header(const struct pcap_pkthdr *hdr, u_char *buf) 1406 { 1407 u_int caplen = hdr->caplen; 1408 u_int length = hdr->len; 1409 struct sll_header *shdr = (struct sll_header *)buf; 1410 uint16_t protocol; 1411 pcap_can_socketcan_hdr *chdr; 1412 1413 if (caplen < (u_int) sizeof(struct sll_header) || 1414 length < (u_int) sizeof(struct sll_header)) { 1415 /* Not enough data to have the protocol field */ 1416 return; 1417 } 1418 1419 protocol = EXTRACT_BE_U_2(&shdr->sll_protocol); 1420 if (protocol != LINUX_SLL_P_CAN && protocol != LINUX_SLL_P_CANFD) 1421 return; 1422 1423 /* 1424 * SocketCAN packet; fix up the packet's header. 1425 */ 1426 chdr = (pcap_can_socketcan_hdr *)(buf + sizeof(struct sll_header)); 1427 if (caplen < (u_int) sizeof(struct sll_header) + sizeof(chdr->can_id) || 1428 length < (u_int) sizeof(struct sll_header) + sizeof(chdr->can_id)) { 1429 /* Not enough data to have the CAN ID */ 1430 return; 1431 } 1432 chdr->can_id = SWAPLONG(chdr->can_id); 1433 } 1434 1435 /* 1436 * The DLT_USB_LINUX and DLT_USB_LINUX_MMAPPED headers are in host 1437 * byte order when capturing (it's supplied directly from a 1438 * memory-mapped buffer shared by the kernel). 1439 * 1440 * When reading a DLT_USB_LINUX or DLT_USB_LINUX_MMAPPED capture file, 1441 * we need to convert it from the byte order of the host that wrote 1442 * the file to this host's byte order. 1443 */ 1444 static void 1445 swap_linux_usb_header(const struct pcap_pkthdr *hdr, u_char *buf, 1446 int header_len_64_bytes) 1447 { 1448 pcap_usb_header_mmapped *uhdr = (pcap_usb_header_mmapped *)buf; 1449 bpf_u_int32 offset = 0; 1450 1451 /* 1452 * "offset" is the offset *past* the field we're swapping; 1453 * we skip the field *before* checking to make sure 1454 * the captured data length includes the entire field. 1455 */ 1456 1457 /* 1458 * The URB id is a totally opaque value; do we really need to 1459 * convert it to the reading host's byte order??? 1460 */ 1461 offset += 8; /* skip past id */ 1462 if (hdr->caplen < offset) 1463 return; 1464 uhdr->id = SWAPLL(uhdr->id); 1465 1466 offset += 4; /* skip past various 1-byte fields */ 1467 1468 offset += 2; /* skip past bus_id */ 1469 if (hdr->caplen < offset) 1470 return; 1471 uhdr->bus_id = SWAPSHORT(uhdr->bus_id); 1472 1473 offset += 2; /* skip past various 1-byte fields */ 1474 1475 offset += 8; /* skip past ts_sec */ 1476 if (hdr->caplen < offset) 1477 return; 1478 uhdr->ts_sec = SWAPLL(uhdr->ts_sec); 1479 1480 offset += 4; /* skip past ts_usec */ 1481 if (hdr->caplen < offset) 1482 return; 1483 uhdr->ts_usec = SWAPLONG(uhdr->ts_usec); 1484 1485 offset += 4; /* skip past status */ 1486 if (hdr->caplen < offset) 1487 return; 1488 uhdr->status = SWAPLONG(uhdr->status); 1489 1490 offset += 4; /* skip past urb_len */ 1491 if (hdr->caplen < offset) 1492 return; 1493 uhdr->urb_len = SWAPLONG(uhdr->urb_len); 1494 1495 offset += 4; /* skip past data_len */ 1496 if (hdr->caplen < offset) 1497 return; 1498 uhdr->data_len = SWAPLONG(uhdr->data_len); 1499 1500 if (uhdr->transfer_type == URB_ISOCHRONOUS) { 1501 offset += 4; /* skip past s.iso.error_count */ 1502 if (hdr->caplen < offset) 1503 return; 1504 uhdr->s.iso.error_count = SWAPLONG(uhdr->s.iso.error_count); 1505 1506 offset += 4; /* skip past s.iso.numdesc */ 1507 if (hdr->caplen < offset) 1508 return; 1509 uhdr->s.iso.numdesc = SWAPLONG(uhdr->s.iso.numdesc); 1510 } else 1511 offset += 8; /* skip USB setup header */ 1512 1513 /* 1514 * With the old header, there are no isochronous descriptors 1515 * after the header. 1516 * 1517 * With the new header, the actual number of descriptors in 1518 * the header is not s.iso.numdesc, it's ndesc - only the 1519 * first N descriptors, for some value of N, are put into 1520 * the header, and ndesc is set to the actual number copied. 1521 * In addition, if s.iso.numdesc is negative, no descriptors 1522 * are captured, and ndesc is set to 0. 1523 */ 1524 if (header_len_64_bytes) { 1525 /* 1526 * This is either the "version 1" header, with 1527 * 16 bytes of additional fields at the end, or 1528 * a "version 0" header from a memory-mapped 1529 * capture, with 16 bytes of zeroed-out padding 1530 * at the end. Byte swap them as if this were 1531 * a "version 1" header. 1532 */ 1533 offset += 4; /* skip past interval */ 1534 if (hdr->caplen < offset) 1535 return; 1536 uhdr->interval = SWAPLONG(uhdr->interval); 1537 1538 offset += 4; /* skip past start_frame */ 1539 if (hdr->caplen < offset) 1540 return; 1541 uhdr->start_frame = SWAPLONG(uhdr->start_frame); 1542 1543 offset += 4; /* skip past xfer_flags */ 1544 if (hdr->caplen < offset) 1545 return; 1546 uhdr->xfer_flags = SWAPLONG(uhdr->xfer_flags); 1547 1548 offset += 4; /* skip past ndesc */ 1549 if (hdr->caplen < offset) 1550 return; 1551 uhdr->ndesc = SWAPLONG(uhdr->ndesc); 1552 1553 if (uhdr->transfer_type == URB_ISOCHRONOUS) { 1554 /* swap the values in struct linux_usb_isodesc */ 1555 usb_isodesc *pisodesc; 1556 uint32_t i; 1557 1558 pisodesc = (usb_isodesc *)(void *)(buf+offset); 1559 for (i = 0; i < uhdr->ndesc; i++) { 1560 offset += 4; /* skip past status */ 1561 if (hdr->caplen < offset) 1562 return; 1563 pisodesc->status = SWAPLONG(pisodesc->status); 1564 1565 offset += 4; /* skip past offset */ 1566 if (hdr->caplen < offset) 1567 return; 1568 pisodesc->offset = SWAPLONG(pisodesc->offset); 1569 1570 offset += 4; /* skip past len */ 1571 if (hdr->caplen < offset) 1572 return; 1573 pisodesc->len = SWAPLONG(pisodesc->len); 1574 1575 offset += 4; /* skip past padding */ 1576 1577 pisodesc++; 1578 } 1579 } 1580 } 1581 } 1582 1583 /* 1584 * The DLT_NFLOG "packets" have a mixture of big-endian and host-byte-order 1585 * data. They begin with a fixed-length header with big-endian fields, 1586 * followed by a set of TLVs, where the type and length are in host 1587 * byte order but the values are either big-endian or are a raw byte 1588 * sequence that's the same regardless of the host's byte order. 1589 * 1590 * When reading a DLT_NFLOG capture file, we need to convert the type 1591 * and length values from the byte order of the host that wrote the 1592 * file to the byte order of this host. 1593 */ 1594 static void 1595 swap_nflog_header(const struct pcap_pkthdr *hdr, u_char *buf) 1596 { 1597 u_char *p = buf; 1598 nflog_hdr_t *nfhdr = (nflog_hdr_t *)buf; 1599 nflog_tlv_t *tlv; 1600 u_int caplen = hdr->caplen; 1601 u_int length = hdr->len; 1602 uint16_t size; 1603 1604 if (caplen < (u_int) sizeof(nflog_hdr_t) || 1605 length < (u_int) sizeof(nflog_hdr_t)) { 1606 /* Not enough data to have any TLVs. */ 1607 return; 1608 } 1609 1610 if (nfhdr->nflog_version != 0) { 1611 /* Unknown NFLOG version */ 1612 return; 1613 } 1614 1615 length -= sizeof(nflog_hdr_t); 1616 caplen -= sizeof(nflog_hdr_t); 1617 p += sizeof(nflog_hdr_t); 1618 1619 while (caplen >= sizeof(nflog_tlv_t)) { 1620 tlv = (nflog_tlv_t *) p; 1621 1622 /* Swap the type and length. */ 1623 tlv->tlv_type = SWAPSHORT(tlv->tlv_type); 1624 tlv->tlv_length = SWAPSHORT(tlv->tlv_length); 1625 1626 /* Get the length of the TLV. */ 1627 size = tlv->tlv_length; 1628 if (size % 4 != 0) 1629 size += 4 - size % 4; 1630 1631 /* Is the TLV's length less than the minimum? */ 1632 if (size < sizeof(nflog_tlv_t)) { 1633 /* Yes. Give up now. */ 1634 return; 1635 } 1636 1637 /* Do we have enough data for the full TLV? */ 1638 if (caplen < size || length < size) { 1639 /* No. */ 1640 return; 1641 } 1642 1643 /* Skip over the TLV. */ 1644 length -= size; 1645 caplen -= size; 1646 p += size; 1647 } 1648 } 1649 1650 void 1651 swap_pseudo_headers(int linktype, struct pcap_pkthdr *hdr, u_char *data) 1652 { 1653 /* 1654 * Convert pseudo-headers from the byte order of 1655 * the host on which the file was saved to our 1656 * byte order, as necessary. 1657 */ 1658 switch (linktype) { 1659 1660 case DLT_LINUX_SLL: 1661 swap_linux_sll_header(hdr, data); 1662 break; 1663 1664 case DLT_USB_LINUX: 1665 swap_linux_usb_header(hdr, data, 0); 1666 break; 1667 1668 case DLT_USB_LINUX_MMAPPED: 1669 swap_linux_usb_header(hdr, data, 1); 1670 break; 1671 1672 case DLT_NFLOG: 1673 swap_nflog_header(hdr, data); 1674 break; 1675 } 1676 } 1677