1 /* $NetBSD: pcap-common.c,v 1.8 2023/08/17 15:18:12 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1993, 1994, 1995, 1996, 1997 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that: (1) source code distributions 9 * retain the above copyright notice and this paragraph in its entirety, (2) 10 * distributions including binary code include the above copyright notice and 11 * this paragraph in its entirety in the documentation or other materials 12 * provided with the distribution, and (3) all advertising materials mentioning 13 * features or use of this software display the following acknowledgement: 14 * ``This product includes software developed by the University of California, 15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16 * the University nor the names of its contributors may be used to endorse 17 * or promote products derived from this software without specific prior 18 * written permission. 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22 * 23 * pcap-common.c - common code for pcap and pcapng files 24 */ 25 26 #include <sys/cdefs.h> 27 __RCSID("$NetBSD: pcap-common.c,v 1.8 2023/08/17 15:18:12 christos Exp $"); 28 29 #ifdef HAVE_CONFIG_H 30 #include <config.h> 31 #endif 32 33 #include <pcap-types.h> 34 35 #include "pcap-int.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 two types are reserved for future use. 172 */ 173 #define LINKTYPE_LANE8023 110 /* ATM LANE + 802.3 */ 174 #define LINKTYPE_HIPPI 111 /* NetBSD HIPPI */ 175 176 /* 177 * Used for NetBSD DLT_HDLC; from looking at the one driver in NetBSD 178 * that uses it, it's Cisco HDLC, so it's the same as DLT_C_HDLC/ 179 * LINKTYPE_C_HDLC, but we define a separate value to avoid some 180 * compatibility issues with programs on NetBSD. 181 * 182 * All code should treat LINKTYPE_NETBSD_HDLC and LINKTYPE_C_HDLC the same. 183 */ 184 #define LINKTYPE_NETBSD_HDLC 112 /* NetBSD HDLC framing */ 185 186 #define LINKTYPE_LINUX_SLL 113 /* Linux cooked socket capture */ 187 #define LINKTYPE_LTALK 114 /* Apple LocalTalk hardware */ 188 #define LINKTYPE_ECONET 115 /* Acorn Econet */ 189 190 /* 191 * Reserved for use with OpenBSD ipfilter. 192 */ 193 #define LINKTYPE_IPFILTER 116 194 195 #define LINKTYPE_PFLOG 117 /* OpenBSD DLT_PFLOG */ 196 #define LINKTYPE_CISCO_IOS 118 /* For Cisco-internal use */ 197 #define LINKTYPE_IEEE802_11_PRISM 119 /* 802.11 plus Prism II monitor mode radio metadata header */ 198 #define LINKTYPE_IEEE802_11_AIRONET 120 /* 802.11 plus FreeBSD Aironet driver radio metadata header */ 199 200 /* 201 * Reserved for Siemens HiPath HDLC. 202 */ 203 #define LINKTYPE_HHDLC 121 204 205 #define LINKTYPE_IP_OVER_FC 122 /* RFC 2625 IP-over-Fibre Channel */ 206 #define LINKTYPE_SUNATM 123 /* Solaris+SunATM */ 207 208 /* 209 * Reserved as per request from Kent Dahlgren <kent@praesum.com> 210 * for private use. 211 */ 212 #define LINKTYPE_RIO 124 /* RapidIO */ 213 #define LINKTYPE_PCI_EXP 125 /* PCI Express */ 214 #define LINKTYPE_AURORA 126 /* Xilinx Aurora link layer */ 215 216 #define LINKTYPE_IEEE802_11_RADIOTAP 127 /* 802.11 plus radiotap radio metadata header */ 217 218 /* 219 * Reserved for the TZSP encapsulation, as per request from 220 * Chris Waters <chris.waters@networkchemistry.com> 221 * TZSP is a generic encapsulation for any other link type, 222 * which includes a means to include meta-information 223 * with the packet, e.g. signal strength and channel 224 * for 802.11 packets. 225 */ 226 #define LINKTYPE_TZSP 128 /* Tazmen Sniffer Protocol */ 227 228 #define LINKTYPE_ARCNET_LINUX 129 /* Linux-style headers */ 229 230 /* 231 * Juniper-private data link types, as per request from 232 * Hannes Gredler <hannes@juniper.net>. The corresponding 233 * DLT_s are used for passing on chassis-internal 234 * metainformation such as QOS profiles, etc.. 235 */ 236 #define LINKTYPE_JUNIPER_MLPPP 130 237 #define LINKTYPE_JUNIPER_MLFR 131 238 #define LINKTYPE_JUNIPER_ES 132 239 #define LINKTYPE_JUNIPER_GGSN 133 240 #define LINKTYPE_JUNIPER_MFR 134 241 #define LINKTYPE_JUNIPER_ATM2 135 242 #define LINKTYPE_JUNIPER_SERVICES 136 243 #define LINKTYPE_JUNIPER_ATM1 137 244 245 #define LINKTYPE_APPLE_IP_OVER_IEEE1394 138 /* Apple IP-over-IEEE 1394 cooked header */ 246 247 #define LINKTYPE_MTP2_WITH_PHDR 139 248 #define LINKTYPE_MTP2 140 249 #define LINKTYPE_MTP3 141 250 #define LINKTYPE_SCCP 142 251 252 #define LINKTYPE_DOCSIS 143 /* DOCSIS MAC frames */ 253 254 #define LINKTYPE_LINUX_IRDA 144 /* Linux-IrDA */ 255 256 /* 257 * Reserved for IBM SP switch and IBM Next Federation switch. 258 */ 259 #define LINKTYPE_IBM_SP 145 260 #define LINKTYPE_IBM_SN 146 261 262 /* 263 * Reserved for private use. If you have some link-layer header type 264 * that you want to use within your organization, with the capture files 265 * using that link-layer header type not ever be sent outside your 266 * organization, you can use these values. 267 * 268 * No libpcap release will use these for any purpose, nor will any 269 * tcpdump release use them, either. 270 * 271 * Do *NOT* use these in capture files that you expect anybody not using 272 * your private versions of capture-file-reading tools to read; in 273 * particular, do *NOT* use them in products, otherwise you may find that 274 * people won't be able to use tcpdump, or snort, or Ethereal, or... to 275 * read capture files from your firewall/intrusion detection/traffic 276 * monitoring/etc. appliance, or whatever product uses that LINKTYPE_ value, 277 * and you may also find that the developers of those applications will 278 * not accept patches to let them read those files. 279 * 280 * Also, do not use them if somebody might send you a capture using them 281 * for *their* private type and tools using them for *your* private type 282 * would have to read them. 283 * 284 * Instead, in those cases, ask "tcpdump-workers@lists.tcpdump.org" for a 285 * new DLT_ and LINKTYPE_ value, as per the comment in pcap/bpf.h, and use 286 * the type you're given. 287 */ 288 #define LINKTYPE_USER0 147 289 #define LINKTYPE_USER1 148 290 #define LINKTYPE_USER2 149 291 #define LINKTYPE_USER3 150 292 #define LINKTYPE_USER4 151 293 #define LINKTYPE_USER5 152 294 #define LINKTYPE_USER6 153 295 #define LINKTYPE_USER7 154 296 #define LINKTYPE_USER8 155 297 #define LINKTYPE_USER9 156 298 #define LINKTYPE_USER10 157 299 #define LINKTYPE_USER11 158 300 #define LINKTYPE_USER12 159 301 #define LINKTYPE_USER13 160 302 #define LINKTYPE_USER14 161 303 #define LINKTYPE_USER15 162 304 305 /* 306 * For future use with 802.11 captures - defined by AbsoluteValue 307 * Systems to store a number of bits of link-layer information 308 * including radio information: 309 * 310 * http://www.shaftnet.org/~pizza/software/capturefrm.txt 311 */ 312 #define LINKTYPE_IEEE802_11_AVS 163 /* 802.11 plus AVS radio metadata header */ 313 314 /* 315 * Juniper-private data link type, as per request from 316 * Hannes Gredler <hannes@juniper.net>. The corresponding 317 * DLT_s are used for passing on chassis-internal 318 * metainformation such as QOS profiles, etc.. 319 */ 320 #define LINKTYPE_JUNIPER_MONITOR 164 321 322 /* 323 * BACnet MS/TP frames. 324 */ 325 #define LINKTYPE_BACNET_MS_TP 165 326 327 /* 328 * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>. 329 * 330 * This is used in some OSes to allow a kernel socket filter to distinguish 331 * between incoming and outgoing packets, on a socket intended to 332 * supply pppd with outgoing packets so it can do dial-on-demand and 333 * hangup-on-lack-of-demand; incoming packets are filtered out so they 334 * don't cause pppd to hold the connection up (you don't want random 335 * input packets such as port scans, packets from old lost connections, 336 * etc. to force the connection to stay up). 337 * 338 * The first byte of the PPP header (0xff03) is modified to accommodate 339 * the direction - 0x00 = IN, 0x01 = OUT. 340 */ 341 #define LINKTYPE_PPP_PPPD 166 342 343 /* 344 * Juniper-private data link type, as per request from 345 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 346 * for passing on chassis-internal metainformation such as 347 * QOS profiles, cookies, etc.. 348 */ 349 #define LINKTYPE_JUNIPER_PPPOE 167 350 #define LINKTYPE_JUNIPER_PPPOE_ATM 168 351 352 #define LINKTYPE_GPRS_LLC 169 /* GPRS LLC */ 353 #define LINKTYPE_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */ 354 #define LINKTYPE_GPF_F 171 /* GPF-F (ITU-T G.7041/Y.1303) */ 355 356 /* 357 * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line 358 * monitoring equipment. 359 */ 360 #define LINKTYPE_GCOM_T1E1 172 361 #define LINKTYPE_GCOM_SERIAL 173 362 363 /* 364 * Juniper-private data link type, as per request from 365 * Hannes Gredler <hannes@juniper.net>. The DLT_ is used 366 * for internal communication to Physical Interface Cards (PIC) 367 */ 368 #define LINKTYPE_JUNIPER_PIC_PEER 174 369 370 /* 371 * Link types requested by Gregor Maier <gregor@endace.com> of Endace 372 * Measurement Systems. They add an ERF header (see 373 * https://www.endace.com/support/EndaceRecordFormat.pdf) in front of 374 * the link-layer header. 375 */ 376 #define LINKTYPE_ERF_ETH 175 /* Ethernet */ 377 #define LINKTYPE_ERF_POS 176 /* Packet-over-SONET */ 378 379 /* 380 * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD 381 * for vISDN (http://www.orlandi.com/visdn/). Its link-layer header 382 * includes additional information before the LAPD header, so it's 383 * not necessarily a generic LAPD header. 384 */ 385 #define LINKTYPE_LINUX_LAPD 177 386 387 /* 388 * Juniper-private data link type, as per request from 389 * Hannes Gredler <hannes@juniper.net>. 390 * The Link Types are used for prepending meta-information 391 * like interface index, interface name 392 * before standard Ethernet, PPP, Frelay & C-HDLC Frames 393 */ 394 #define LINKTYPE_JUNIPER_ETHER 178 395 #define LINKTYPE_JUNIPER_PPP 179 396 #define LINKTYPE_JUNIPER_FRELAY 180 397 #define LINKTYPE_JUNIPER_CHDLC 181 398 399 /* 400 * Multi Link Frame Relay (FRF.16) 401 */ 402 #define LINKTYPE_MFR 182 403 404 /* 405 * Juniper-private data link type, as per request from 406 * Hannes Gredler <hannes@juniper.net>. 407 * The DLT_ is used for internal communication with a 408 * voice Adapter Card (PIC) 409 */ 410 #define LINKTYPE_JUNIPER_VP 183 411 412 /* 413 * Arinc 429 frames. 414 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 415 * Every frame contains a 32bit A429 label. 416 * More documentation on Arinc 429 can be found at 417 * https://web.archive.org/web/20040616233302/https://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf 418 */ 419 #define LINKTYPE_A429 184 420 421 /* 422 * Arinc 653 Interpartition Communication messages. 423 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 424 * Please refer to the A653-1 standard for more information. 425 */ 426 #define LINKTYPE_A653_ICM 185 427 428 /* 429 * This used to be "USB packets, beginning with a USB setup header; 430 * requested by Paolo Abeni <paolo.abeni@email.it>." 431 * 432 * However, that header didn't work all that well - it left out some 433 * useful information - and was abandoned in favor of the DLT_USB_LINUX 434 * header. 435 * 436 * This is now used by FreeBSD for its BPF taps for USB; that has its 437 * own headers. So it is written, so it is done. 438 */ 439 #define LINKTYPE_USB_FREEBSD 186 440 441 /* 442 * Bluetooth HCI UART transport layer (part H:4); requested by 443 * Paolo Abeni. 444 */ 445 #define LINKTYPE_BLUETOOTH_HCI_H4 187 446 447 /* 448 * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz 449 * <cruz_petagay@bah.com>. 450 */ 451 #define LINKTYPE_IEEE802_16_MAC_CPS 188 452 453 /* 454 * USB packets, beginning with a Linux USB header; requested by 455 * Paolo Abeni <paolo.abeni@email.it>. 456 */ 457 #define LINKTYPE_USB_LINUX 189 458 459 /* 460 * Controller Area Network (CAN) v. 2.0B packets. 461 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 462 * Used to dump CAN packets coming from a CAN Vector board. 463 * More documentation on the CAN v2.0B frames can be found at 464 * http://www.can-cia.org/downloads/?269 465 */ 466 #define LINKTYPE_CAN20B 190 467 468 /* 469 * IEEE 802.15.4, with address fields padded, as is done by Linux 470 * drivers; requested by Juergen Schimmer. 471 */ 472 #define LINKTYPE_IEEE802_15_4_LINUX 191 473 474 /* 475 * Per Packet Information encapsulated packets. 476 * LINKTYPE_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 477 */ 478 #define LINKTYPE_PPI 192 479 480 /* 481 * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header; 482 * requested by Charles Clancy. 483 */ 484 #define LINKTYPE_IEEE802_16_MAC_CPS_RADIO 193 485 486 /* 487 * Juniper-private data link type, as per request from 488 * Hannes Gredler <hannes@juniper.net>. 489 * The DLT_ is used for internal communication with a 490 * integrated service module (ISM). 491 */ 492 #define LINKTYPE_JUNIPER_ISM 194 493 494 /* 495 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 496 * nothing), and with the FCS at the end of the frame; requested by 497 * Mikko Saarnivala <mikko.saarnivala@sensinode.com>. 498 * 499 * This should only be used if the FCS is present at the end of the 500 * frame; if the frame has no FCS, DLT_IEEE802_15_4_NOFCS should be 501 * used. 502 */ 503 #define LINKTYPE_IEEE802_15_4_WITHFCS 195 504 505 /* 506 * Various link-layer types, with a pseudo-header, for SITA 507 * (https://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com). 508 */ 509 #define LINKTYPE_SITA 196 510 511 /* 512 * Various link-layer types, with a pseudo-header, for Endace DAG cards; 513 * encapsulates Endace ERF records. Requested by Stephen Donnelly 514 * <stephen@endace.com>. 515 */ 516 #define LINKTYPE_ERF 197 517 518 /* 519 * Special header prepended to Ethernet packets when capturing from a 520 * u10 Networks board. Requested by Phil Mulholland 521 * <phil@u10networks.com>. 522 */ 523 #define LINKTYPE_RAIF1 198 524 525 /* 526 * IPMB packet for IPMI, beginning with a 2-byte header, followed by 527 * the I2C slave address, followed by the netFn and LUN, etc.. 528 * Requested by Chanthy Toeung <chanthy.toeung@ca.kontron.com>. 529 * 530 * XXX - its DLT_ value used to be called DLT_IPMB, back when we got the 531 * impression from the email thread requesting it that the packet 532 * had no extra 2-byte header. We've renamed it; if anybody used 533 * DLT_IPMB and assumed no 2-byte header, this will cause the compile 534 * to fail, at which point we'll have to figure out what to do about 535 * the two header types using the same DLT_/LINKTYPE_ value. If that 536 * doesn't happen, we'll assume nobody used it and that the redefinition 537 * is safe. 538 */ 539 #define LINKTYPE_IPMB_KONTRON 199 540 541 /* 542 * Juniper-private data link type, as per request from 543 * Hannes Gredler <hannes@juniper.net>. 544 * The DLT_ is used for capturing data on a secure tunnel interface. 545 */ 546 #define LINKTYPE_JUNIPER_ST 200 547 548 /* 549 * Bluetooth HCI UART transport layer (part H:4), with pseudo-header 550 * that includes direction information; requested by Paolo Abeni. 551 */ 552 #define LINKTYPE_BLUETOOTH_HCI_H4_WITH_PHDR 201 553 554 /* 555 * AX.25 packet with a 1-byte KISS header; see 556 * 557 * http://www.ax25.net/kiss.htm 558 * 559 * as per Richard Stearn <richard@rns-stearn.demon.co.uk>. 560 */ 561 #define LINKTYPE_AX25_KISS 202 562 563 /* 564 * LAPD packets from an ISDN channel, starting with the address field, 565 * with no pseudo-header. 566 * Requested by Varuna De Silva <varunax@gmail.com>. 567 */ 568 #define LINKTYPE_LAPD 203 569 570 /* 571 * PPP, with a one-byte direction pseudo-header prepended - zero means 572 * "received by this host", non-zero (any non-zero value) means "sent by 573 * this host" - as per Will Barker <w.barker@zen.co.uk>. 574 */ 575 #define LINKTYPE_PPP_WITH_DIR 204 /* Don't confuse with LINKTYPE_PPP_PPPD */ 576 577 /* 578 * Cisco HDLC, with a one-byte direction pseudo-header prepended - zero 579 * means "received by this host", non-zero (any non-zero value) means 580 * "sent by this host" - as per Will Barker <w.barker@zen.co.uk>. 581 */ 582 #define LINKTYPE_C_HDLC_WITH_DIR 205 /* Cisco HDLC */ 583 584 /* 585 * Frame Relay, with a one-byte direction pseudo-header prepended - zero 586 * means "received by this host" (DCE -> DTE), non-zero (any non-zero 587 * value) means "sent by this host" (DTE -> DCE) - as per Will Barker 588 * <w.barker@zen.co.uk>. 589 */ 590 #define LINKTYPE_FRELAY_WITH_DIR 206 /* Frame Relay */ 591 592 /* 593 * LAPB, with a one-byte direction pseudo-header prepended - zero means 594 * "received by this host" (DCE -> DTE), non-zero (any non-zero value) 595 * means "sent by this host" (DTE -> DCE)- as per Will Barker 596 * <w.barker@zen.co.uk>. 597 */ 598 #define LINKTYPE_LAPB_WITH_DIR 207 /* LAPB */ 599 600 /* 601 * 208 is reserved for an as-yet-unspecified proprietary link-layer 602 * type, as requested by Will Barker. 603 */ 604 605 /* 606 * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman 607 * <avn@pigeonpoint.com>. 608 */ 609 #define LINKTYPE_IPMB_LINUX 209 610 611 /* 612 * FlexRay automotive bus - http://www.flexray.com/ - as requested 613 * by Hannes Kaelber <hannes.kaelber@x2e.de>. 614 */ 615 #define LINKTYPE_FLEXRAY 210 616 617 /* 618 * Media Oriented Systems Transport (MOST) bus for multimedia 619 * transport - https://www.mostcooperation.com/ - as requested 620 * by Hannes Kaelber <hannes.kaelber@x2e.de>. 621 */ 622 #define LINKTYPE_MOST 211 623 624 /* 625 * Local Interconnect Network (LIN) bus for vehicle networks - 626 * http://www.lin-subbus.org/ - as requested by Hannes Kaelber 627 * <hannes.kaelber@x2e.de>. 628 */ 629 #define LINKTYPE_LIN 212 630 631 /* 632 * X2E-private data link type used for serial line capture, 633 * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. 634 */ 635 #define LINKTYPE_X2E_SERIAL 213 636 637 /* 638 * X2E-private data link type used for the Xoraya data logger 639 * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. 640 */ 641 #define LINKTYPE_X2E_XORAYA 214 642 643 /* 644 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 645 * nothing), but with the PHY-level data for non-ASK PHYs (4 octets 646 * of 0 as preamble, one octet of SFD, one octet of frame length+ 647 * reserved bit, and then the MAC-layer data, starting with the 648 * frame control field). 649 * 650 * Requested by Max Filippov <jcmvbkbc@gmail.com>. 651 */ 652 #define LINKTYPE_IEEE802_15_4_NONASK_PHY 215 653 654 /* 655 * David Gibson <david@gibson.dropbear.id.au> requested this for 656 * captures from the Linux kernel /dev/input/eventN devices. This 657 * is used to communicate keystrokes and mouse movements from the 658 * Linux kernel to display systems, such as Xorg. 659 */ 660 #define LINKTYPE_LINUX_EVDEV 216 661 662 /* 663 * GSM Um and Abis interfaces, preceded by a "gsmtap" header. 664 * 665 * Requested by Harald Welte <laforge@gnumonks.org>. 666 */ 667 #define LINKTYPE_GSMTAP_UM 217 668 #define LINKTYPE_GSMTAP_ABIS 218 669 670 /* 671 * MPLS, with an MPLS label as the link-layer header. 672 * Requested by Michele Marchetto <michele@openbsd.org> on behalf 673 * of OpenBSD. 674 */ 675 #define LINKTYPE_MPLS 219 676 677 /* 678 * USB packets, beginning with a Linux USB header, with the USB header 679 * padded to 64 bytes; required for memory-mapped access. 680 */ 681 #define LINKTYPE_USB_LINUX_MMAPPED 220 682 683 /* 684 * DECT packets, with a pseudo-header; requested by 685 * Matthias Wenzel <tcpdump@mazzoo.de>. 686 */ 687 #define LINKTYPE_DECT 221 688 689 /* 690 * From: "Lidwa, Eric (GSFC-582.0)[SGT INC]" <eric.lidwa-1@nasa.gov> 691 * Date: Mon, 11 May 2009 11:18:30 -0500 692 * 693 * DLT_AOS. We need it for AOS Space Data Link Protocol. 694 * I have already written dissectors for but need an OK from 695 * legal before I can submit a patch. 696 * 697 */ 698 #define LINKTYPE_AOS 222 699 700 /* 701 * Wireless HART (Highway Addressable Remote Transducer) 702 * From the HART Communication Foundation 703 * IES/PAS 62591 704 * 705 * Requested by Sam Roberts <vieuxtech@gmail.com>. 706 */ 707 #define LINKTYPE_WIHART 223 708 709 /* 710 * Fibre Channel FC-2 frames, beginning with a Frame_Header. 711 * Requested by Kahou Lei <kahou82@gmail.com>. 712 */ 713 #define LINKTYPE_FC_2 224 714 715 /* 716 * Fibre Channel FC-2 frames, beginning with an encoding of the 717 * SOF, and ending with an encoding of the EOF. 718 * 719 * The encodings represent the frame delimiters as 4-byte sequences 720 * representing the corresponding ordered sets, with K28.5 721 * represented as 0xBC, and the D symbols as the corresponding 722 * byte values; for example, SOFi2, which is K28.5 - D21.5 - D1.2 - D21.2, 723 * is represented as 0xBC 0xB5 0x55 0x55. 724 * 725 * Requested by Kahou Lei <kahou82@gmail.com>. 726 */ 727 #define LINKTYPE_FC_2_WITH_FRAME_DELIMS 225 728 729 /* 730 * Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>. 731 * 732 * The pseudo-header starts with a one-byte version number; for version 2, 733 * the pseudo-header is: 734 * 735 * struct dl_ipnetinfo { 736 * uint8_t dli_version; 737 * uint8_t dli_family; 738 * uint16_t dli_htype; 739 * uint32_t dli_pktlen; 740 * uint32_t dli_ifindex; 741 * uint32_t dli_grifindex; 742 * uint32_t dli_zsrc; 743 * uint32_t dli_zdst; 744 * }; 745 * 746 * dli_version is 2 for the current version of the pseudo-header. 747 * 748 * dli_family is a Solaris address family value, so it's 2 for IPv4 749 * and 26 for IPv6. 750 * 751 * dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing 752 * packets, and 2 for packets arriving from another zone on the same 753 * machine. 754 * 755 * dli_pktlen is the length of the packet data following the pseudo-header 756 * (so the captured length minus dli_pktlen is the length of the 757 * pseudo-header, assuming the entire pseudo-header was captured). 758 * 759 * dli_ifindex is the interface index of the interface on which the 760 * packet arrived. 761 * 762 * dli_grifindex is the group interface index number (for IPMP interfaces). 763 * 764 * dli_zsrc is the zone identifier for the source of the packet. 765 * 766 * dli_zdst is the zone identifier for the destination of the packet. 767 * 768 * A zone number of 0 is the global zone; a zone number of 0xffffffff 769 * means that the packet arrived from another host on the network, not 770 * from another zone on the same machine. 771 * 772 * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates 773 * which of those it is. 774 */ 775 #define LINKTYPE_IPNET 226 776 777 /* 778 * CAN (Controller Area Network) frames, with a pseudo-header as supplied 779 * by Linux SocketCAN, and with multi-byte numerical fields in that header 780 * in big-endian byte order. 781 * 782 * See Documentation/networking/can.txt in the Linux source. 783 * 784 * Requested by Felix Obenhuber <felix@obenhuber.de>. 785 */ 786 #define LINKTYPE_CAN_SOCKETCAN 227 787 788 /* 789 * Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies 790 * whether it's v4 or v6. Requested by Darren Reed <Darren.Reed@Sun.COM>. 791 */ 792 #define LINKTYPE_IPV4 228 793 #define LINKTYPE_IPV6 229 794 795 /* 796 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 797 * nothing), and with no FCS at the end of the frame; requested by 798 * Jon Smirl <jonsmirl@gmail.com>. 799 */ 800 #define LINKTYPE_IEEE802_15_4_NOFCS 230 801 802 /* 803 * Raw D-Bus: 804 * 805 * https://www.freedesktop.org/wiki/Software/dbus 806 * 807 * messages: 808 * 809 * https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages 810 * 811 * starting with the endianness flag, followed by the message type, etc., 812 * but without the authentication handshake before the message sequence: 813 * 814 * https://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol 815 * 816 * Requested by Martin Vidner <martin@vidner.net>. 817 */ 818 #define LINKTYPE_DBUS 231 819 820 /* 821 * Juniper-private data link type, as per request from 822 * Hannes Gredler <hannes@juniper.net>. 823 */ 824 #define LINKTYPE_JUNIPER_VS 232 825 #define LINKTYPE_JUNIPER_SRX_E2E 233 826 #define LINKTYPE_JUNIPER_FIBRECHANNEL 234 827 828 /* 829 * DVB-CI (DVB Common Interface for communication between a PC Card 830 * module and a DVB receiver). See 831 * 832 * https://www.kaiser.cx/pcap-dvbci.html 833 * 834 * for the specification. 835 * 836 * Requested by Martin Kaiser <martin@kaiser.cx>. 837 */ 838 #define LINKTYPE_DVB_CI 235 839 840 /* 841 * Variant of 3GPP TS 27.010 multiplexing protocol. Requested 842 * by Hans-Christoph Schemmel <hans-christoph.schemmel@cinterion.com>. 843 */ 844 #define LINKTYPE_MUX27010 236 845 846 /* 847 * STANAG 5066 D_PDUs. Requested by M. Baris Demiray 848 * <barisdemiray@gmail.com>. 849 */ 850 #define LINKTYPE_STANAG_5066_D_PDU 237 851 852 /* 853 * Juniper-private data link type, as per request from 854 * Hannes Gredler <hannes@juniper.net>. 855 */ 856 #define LINKTYPE_JUNIPER_ATM_CEMIC 238 857 858 /* 859 * NetFilter LOG messages 860 * (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets) 861 * 862 * Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl> 863 */ 864 #define LINKTYPE_NFLOG 239 865 866 /* 867 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type 868 * for Ethernet packets with a 4-byte pseudo-header and always 869 * with the payload including the FCS, as supplied by their 870 * netANALYZER hardware and software. 871 * 872 * Requested by Holger P. Frommer <HPfrommer@hilscher.com> 873 */ 874 #define LINKTYPE_NETANALYZER 240 875 876 /* 877 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type 878 * for Ethernet packets with a 4-byte pseudo-header and FCS and 879 * 1 byte of SFD, as supplied by their netANALYZER hardware and 880 * software. 881 * 882 * Requested by Holger P. Frommer <HPfrommer@hilscher.com> 883 */ 884 #define LINKTYPE_NETANALYZER_TRANSPARENT 241 885 886 /* 887 * IP-over-InfiniBand, as specified by RFC 4391. 888 * 889 * Requested by Petr Sumbera <petr.sumbera@oracle.com>. 890 */ 891 #define LINKTYPE_IPOIB 242 892 893 /* 894 * MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0). 895 * 896 * Requested by Guy Martin <gmsoft@tuxicoman.be>. 897 */ 898 #define LINKTYPE_MPEG_2_TS 243 899 900 /* 901 * ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as 902 * used by their ng40 protocol tester. 903 * 904 * Requested by Jens Grimmer <jens.grimmer@ng4t.com>. 905 */ 906 #define LINKTYPE_NG40 244 907 908 /* 909 * Pseudo-header giving adapter number and flags, followed by an NFC 910 * (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU, 911 * as specified by NFC Forum Logical Link Control Protocol Technical 912 * Specification LLCP 1.1. 913 * 914 * Requested by Mike Wakerly <mikey@google.com>. 915 */ 916 #define LINKTYPE_NFC_LLCP 245 917 918 /* 919 * pfsync output; DLT_PFSYNC is 18, which collides with DLT_CIP in 920 * SuSE 6.3, on OpenBSD, NetBSD, DragonFly BSD, and macOS, and 921 * is 121, which collides with DLT_HHDLC, in FreeBSD. We pick a 922 * shiny new link-layer header type value that doesn't collide with 923 * anything, in the hopes that future pfsync savefiles, if any, 924 * won't require special hacks to distinguish from other savefiles. 925 * 926 */ 927 #define LINKTYPE_PFSYNC 246 928 929 /* 930 * Raw InfiniBand packets, starting with the Local Routing Header. 931 * 932 * Requested by Oren Kladnitsky <orenk@mellanox.com>. 933 */ 934 #define LINKTYPE_INFINIBAND 247 935 936 /* 937 * SCTP, with no lower-level protocols (i.e., no IPv4 or IPv6). 938 * 939 * Requested by Michael Tuexen <Michael.Tuexen@lurchi.franken.de>. 940 */ 941 #define LINKTYPE_SCTP 248 942 943 /* 944 * USB packets, beginning with a USBPcap header. 945 * 946 * Requested by Tomasz Mon <desowin@gmail.com> 947 */ 948 #define LINKTYPE_USBPCAP 249 949 950 /* 951 * Schweitzer Engineering Laboratories "RTAC" product serial-line 952 * packets. 953 * 954 * Requested by Chris Bontje <chris_bontje@selinc.com>. 955 */ 956 #define LINKTYPE_RTAC_SERIAL 250 957 958 /* 959 * Bluetooth Low Energy air interface link-layer packets. 960 * 961 * Requested by Mike Kershaw <dragorn@kismetwireless.net>. 962 */ 963 #define LINKTYPE_BLUETOOTH_LE_LL 251 964 965 /* 966 * Link-layer header type for upper-protocol layer PDU saves from wireshark. 967 * 968 * the actual contents are determined by two TAGs, one or more of 969 * which is stored with each packet: 970 * 971 * EXP_PDU_TAG_DISSECTOR_NAME the name of the Wireshark dissector 972 * that can make sense of the data stored. 973 * 974 * EXP_PDU_TAG_HEUR_DISSECTOR_NAME the name of the Wireshark heuristic 975 * dissector that can make sense of the 976 * data stored. 977 */ 978 #define LINKTYPE_WIRESHARK_UPPER_PDU 252 979 980 /* 981 * Link-layer header type for the netlink protocol (nlmon devices). 982 */ 983 #define LINKTYPE_NETLINK 253 984 985 /* 986 * Bluetooth Linux Monitor headers for the BlueZ stack. 987 */ 988 #define LINKTYPE_BLUETOOTH_LINUX_MONITOR 254 989 990 /* 991 * Bluetooth Basic Rate/Enhanced Data Rate baseband packets, as 992 * captured by Ubertooth. 993 */ 994 #define LINKTYPE_BLUETOOTH_BREDR_BB 255 995 996 /* 997 * Bluetooth Low Energy link layer packets, as captured by Ubertooth. 998 */ 999 #define LINKTYPE_BLUETOOTH_LE_LL_WITH_PHDR 256 1000 1001 /* 1002 * PROFIBUS data link layer. 1003 */ 1004 #define LINKTYPE_PROFIBUS_DL 257 1005 1006 /* 1007 * Apple's DLT_PKTAP headers. 1008 * 1009 * Sadly, the folks at Apple either had no clue that the DLT_USERn values 1010 * are for internal use within an organization and partners only, and 1011 * didn't know that the right way to get a link-layer header type is to 1012 * ask tcpdump.org for one, or knew and didn't care, so they just 1013 * used DLT_USER2, which causes problems for everything except for 1014 * their version of tcpdump. 1015 * 1016 * So I'll just give them one; hopefully this will show up in a 1017 * libpcap release in time for them to get this into 10.10 Big Sur 1018 * or whatever Mavericks' successor is called. LINKTYPE_PKTAP 1019 * will be 258 *even on macOS*; that is *intentional*, so that 1020 * PKTAP files look the same on *all* OSes (different OSes can have 1021 * different numerical values for a given DLT_, but *MUST NOT* have 1022 * different values for what goes in a file, as files can be moved 1023 * between OSes!). 1024 */ 1025 #define LINKTYPE_PKTAP 258 1026 1027 /* 1028 * Ethernet packets preceded by a header giving the last 6 octets 1029 * of the preamble specified by 802.3-2012 Clause 65, section 1030 * 65.1.3.2 "Transmit". 1031 */ 1032 #define LINKTYPE_EPON 259 1033 1034 /* 1035 * IPMI trace packets, as specified by Table 3-20 "Trace Data Block Format" 1036 * in the PICMG HPM.2 specification. 1037 */ 1038 #define LINKTYPE_IPMI_HPM_2 260 1039 1040 /* 1041 * per Joshua Wright <jwright@hasborg.com>, formats for Zwave captures. 1042 */ 1043 #define LINKTYPE_ZWAVE_R1_R2 261 1044 #define LINKTYPE_ZWAVE_R3 262 1045 1046 /* 1047 * per Steve Karg <skarg@users.sourceforge.net>, formats for Wattstopper 1048 * Digital Lighting Management room bus serial protocol captures. 1049 */ 1050 #define LINKTYPE_WATTSTOPPER_DLM 263 1051 1052 /* 1053 * ISO 14443 contactless smart card messages. 1054 */ 1055 #define LINKTYPE_ISO_14443 264 1056 1057 /* 1058 * Radio data system (RDS) groups. IEC 62106. 1059 * Per Jonathan Brucker <jonathan.brucke@gmail.com>. 1060 */ 1061 #define LINKTYPE_RDS 265 1062 1063 /* 1064 * USB packets, beginning with a Darwin (macOS, etc.) header. 1065 */ 1066 #define LINKTYPE_USB_DARWIN 266 1067 1068 /* 1069 * OpenBSD DLT_OPENFLOW. 1070 */ 1071 #define LINKTYPE_OPENFLOW 267 1072 1073 /* 1074 * SDLC frames containing SNA PDUs. 1075 */ 1076 #define LINKTYPE_SDLC 268 1077 1078 /* 1079 * per "Selvig, Bjorn" <b.selvig@ti.com> used for 1080 * TI protocol sniffer. 1081 */ 1082 #define LINKTYPE_TI_LLN_SNIFFER 269 1083 1084 /* 1085 * per: Erik de Jong <erikdejong at gmail.com> for 1086 * https://github.com/eriknl/LoRaTap/releases/tag/v0.1 1087 */ 1088 #define LINKTYPE_LORATAP 270 1089 1090 /* 1091 * per: Stefanha at gmail.com for 1092 * https://lists.sandelman.ca/pipermail/tcpdump-workers/2017-May/000772.html 1093 * and: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/vsockmon.h 1094 * for: https://qemu-project.org/Features/VirtioVsock 1095 */ 1096 #define LINKTYPE_VSOCK 271 1097 1098 /* 1099 * Nordic Semiconductor Bluetooth LE sniffer. 1100 */ 1101 #define LINKTYPE_NORDIC_BLE 272 1102 1103 /* 1104 * Excentis DOCSIS 3.1 RF sniffer (XRA-31) 1105 * per: bruno.verstuyft at excentis.com 1106 * https://www.xra31.com/xra-header 1107 */ 1108 #define LINKTYPE_DOCSIS31_XRA31 273 1109 1110 /* 1111 * mPackets, as specified by IEEE 802.3br Figure 99-4, starting 1112 * with the preamble and always ending with a CRC field. 1113 */ 1114 #define LINKTYPE_ETHERNET_MPACKET 274 1115 1116 /* 1117 * DisplayPort AUX channel monitoring data as specified by VESA 1118 * DisplayPort(DP) Standard preceded by a pseudo-header. 1119 * per dirk.eibach at gdsys.cc 1120 */ 1121 #define LINKTYPE_DISPLAYPORT_AUX 275 1122 1123 /* 1124 * Linux cooked sockets v2. 1125 */ 1126 #define LINKTYPE_LINUX_SLL2 276 1127 1128 /* 1129 * Sercos Monitor, per Manuel Jacob <manuel.jacob at steinbeis-stg.de> 1130 */ 1131 #define LINKTYPE_SERCOS_MONITOR 277 1132 1133 /* 1134 * OpenVizsla http://openvizsla.org is open source USB analyzer hardware. 1135 * It consists of FPGA with attached USB phy and FTDI chip for streaming 1136 * the data to the host PC. 1137 * 1138 * Current OpenVizsla data encapsulation format is described here: 1139 * https://github.com/matwey/libopenvizsla/wiki/OpenVizsla-protocol-description 1140 * 1141 */ 1142 #define LINKTYPE_OPENVIZSLA 278 1143 1144 /* 1145 * The Elektrobit High Speed Capture and Replay (EBHSCR) protocol is produced 1146 * by a PCIe Card for interfacing high speed automotive interfaces. 1147 * 1148 * The specification for this frame format can be found at: 1149 * https://www.elektrobit.com/ebhscr 1150 * 1151 * for Guenter.Ebermann at elektrobit.com 1152 * 1153 */ 1154 #define LINKTYPE_EBHSCR 279 1155 1156 /* 1157 * The https://fd.io vpp graph dispatch tracer produces pcap trace files 1158 * in the format documented here: 1159 * https://fdio-vpp.readthedocs.io/en/latest/gettingstarted/developers/vnet.html#graph-dispatcher-pcap-tracing 1160 */ 1161 #define LINKTYPE_VPP_DISPATCH 280 1162 1163 /* 1164 * Broadcom Ethernet switches (ROBO switch) 4 bytes proprietary tagging format. 1165 */ 1166 #define LINKTYPE_DSA_TAG_BRCM 281 1167 #define LINKTYPE_DSA_TAG_BRCM_PREPEND 282 1168 1169 /* 1170 * IEEE 802.15.4 with pseudo-header and optional meta-data TLVs, PHY payload 1171 * exactly as it appears in the spec (no padding, no nothing), and FCS if 1172 * specified by FCS Type TLV; requested by James Ko <jck@exegin.com>. 1173 * Specification at https://github.com/jkcko/ieee802.15.4-tap 1174 */ 1175 #define LINKTYPE_IEEE802_15_4_TAP 283 1176 1177 /* 1178 * Marvell (Ethertype) Distributed Switch Architecture proprietary tagging format. 1179 */ 1180 #define LINKTYPE_DSA_TAG_DSA 284 1181 #define LINKTYPE_DSA_TAG_EDSA 285 1182 1183 /* 1184 * Payload of lawful intercept packets using the ELEE protocol; 1185 * https://socket.hr/draft-dfranusic-opsawg-elee-00.xml 1186 * https://xml2rfc.tools.ietf.org/cgi-bin/xml2rfc.cgi?url=https://socket.hr/draft-dfranusic-opsawg-elee-00.xml&modeAsFormat=html/ascii 1187 */ 1188 #define LINKTYPE_ELEE 286 1189 1190 /* 1191 * Serial frames transmitted between a host and a Z-Wave chip. 1192 */ 1193 #define LINKTYPE_Z_WAVE_SERIAL 287 1194 1195 /* 1196 * USB 2.0, 1.1, and 1.0 packets as transmitted over the cable. 1197 */ 1198 #define LINKTYPE_USB_2_0 288 1199 1200 /* 1201 * ATSC Link-Layer Protocol (A/330) packets. 1202 */ 1203 #define LINKTYPE_ATSC_ALP 289 1204 1205 #define LINKTYPE_MATCHING_MAX 289 /* highest value in the "matching" range */ 1206 1207 /* 1208 * The DLT_ and LINKTYPE_ values in the "matching" range should be the 1209 * same, so DLT_MATCHING_MAX and LINKTYPE_MATCHING_MAX should be the 1210 * same. 1211 */ 1212 #if LINKTYPE_MATCHING_MAX != DLT_MATCHING_MAX 1213 #error The LINKTYPE_ matching range does not match the DLT_ matching range 1214 #endif 1215 1216 static struct linktype_map { 1217 int dlt; 1218 int linktype; 1219 } map[] = { 1220 /* 1221 * These DLT_* codes have LINKTYPE_* codes with values identical 1222 * to the values of the corresponding DLT_* code. 1223 */ 1224 { DLT_NULL, LINKTYPE_NULL }, 1225 { DLT_EN10MB, LINKTYPE_ETHERNET }, 1226 { DLT_EN3MB, LINKTYPE_EXP_ETHERNET }, 1227 { DLT_AX25, LINKTYPE_AX25 }, 1228 { DLT_PRONET, LINKTYPE_PRONET }, 1229 { DLT_CHAOS, LINKTYPE_CHAOS }, 1230 { DLT_IEEE802, LINKTYPE_IEEE802_5 }, 1231 { DLT_ARCNET, LINKTYPE_ARCNET_BSD }, 1232 { DLT_SLIP, LINKTYPE_SLIP }, 1233 { DLT_PPP, LINKTYPE_PPP }, 1234 { DLT_FDDI, LINKTYPE_FDDI }, 1235 { DLT_SYMANTEC_FIREWALL, LINKTYPE_SYMANTEC_FIREWALL }, 1236 1237 /* 1238 * These DLT_* codes have different values on different 1239 * platforms; we map them to LINKTYPE_* codes that 1240 * have values that should never be equal to any DLT_* 1241 * code. 1242 */ 1243 #ifdef DLT_FR 1244 /* BSD/OS Frame Relay */ 1245 { DLT_FR, LINKTYPE_FRELAY }, 1246 #endif 1247 1248 { DLT_ATM_RFC1483, LINKTYPE_ATM_RFC1483 }, 1249 { DLT_RAW, LINKTYPE_RAW }, 1250 { DLT_SLIP_BSDOS, LINKTYPE_SLIP_BSDOS }, 1251 { DLT_PPP_BSDOS, LINKTYPE_PPP_BSDOS }, 1252 { DLT_HDLC, LINKTYPE_NETBSD_HDLC }, 1253 1254 /* BSD/OS Cisco HDLC */ 1255 { DLT_C_HDLC, LINKTYPE_C_HDLC }, 1256 1257 /* 1258 * These DLT_* codes are not on all platforms, but, so far, 1259 * there don't appear to be any platforms that define 1260 * other codes with those values; we map them to 1261 * different LINKTYPE_* values anyway, just in case. 1262 */ 1263 1264 /* Linux ATM Classical IP */ 1265 { DLT_ATM_CLIP, LINKTYPE_ATM_CLIP }, 1266 1267 /* NetBSD sync/async serial PPP (or Cisco HDLC) */ 1268 { DLT_PPP_SERIAL, LINKTYPE_PPP_HDLC }, 1269 1270 /* NetBSD PPP over Ethernet */ 1271 { DLT_PPP_ETHER, LINKTYPE_PPP_ETHER }, 1272 1273 /* 1274 * All LINKTYPE_ values between LINKTYPE_MATCHING_MIN 1275 * and LINKTYPE_MATCHING_MAX are mapped to identical 1276 * DLT_ values. 1277 */ 1278 1279 { -1, -1 } 1280 }; 1281 1282 int 1283 dlt_to_linktype(int dlt) 1284 { 1285 int i; 1286 1287 /* 1288 * DLTs that, on some platforms, have values in the matching range 1289 * but that *don't* have the same value as the corresponding 1290 * LINKTYPE because, for some reason, not all OSes have the 1291 * same value for that DLT (note that the DLT's value might be 1292 * outside the matching range on some of those OSes). 1293 */ 1294 if (dlt == DLT_PFSYNC) 1295 return (LINKTYPE_PFSYNC); 1296 if (dlt == DLT_PKTAP) 1297 return (LINKTYPE_PKTAP); 1298 1299 /* 1300 * For all other values in the matching range, the DLT 1301 * value is the same as the LINKTYPE value. 1302 */ 1303 if (dlt >= DLT_MATCHING_MIN && dlt <= DLT_MATCHING_MAX) 1304 return (dlt); 1305 1306 /* 1307 * Map the values outside that range. 1308 */ 1309 for (i = 0; map[i].dlt != -1; i++) { 1310 if (map[i].dlt == dlt) 1311 return (map[i].linktype); 1312 } 1313 1314 /* 1315 * If we don't have a mapping for this DLT, return an 1316 * error; that means that this is a value with no corresponding 1317 * LINKTYPE, and we need to assign one. 1318 */ 1319 return (-1); 1320 } 1321 1322 int 1323 linktype_to_dlt(int linktype) 1324 { 1325 int i; 1326 1327 /* 1328 * LINKTYPEs in the matching range that *don't* 1329 * have the same value as the corresponding DLTs 1330 * because, for some reason, not all OSes have the 1331 * same value for that DLT. 1332 */ 1333 if (linktype == LINKTYPE_PFSYNC) 1334 return (DLT_PFSYNC); 1335 if (linktype == LINKTYPE_PKTAP) 1336 return (DLT_PKTAP); 1337 1338 /* 1339 * For all other values in the matching range, except for 1340 * LINKTYPE_ATM_CLIP, the LINKTYPE value is the same as 1341 * the DLT value. 1342 * 1343 * LINKTYPE_ATM_CLIP is a special case. DLT_ATM_CLIP is 1344 * not on all platforms, but, so far, there don't appear 1345 * to be any platforms that define it as anything other 1346 * than 19; we define LINKTYPE_ATM_CLIP as something 1347 * other than 19, just in case. That value is in the 1348 * matching range, so we have to check for it. 1349 */ 1350 if (linktype >= LINKTYPE_MATCHING_MIN && 1351 linktype <= LINKTYPE_MATCHING_MAX && 1352 linktype != LINKTYPE_ATM_CLIP) 1353 return (linktype); 1354 1355 /* 1356 * Map the values outside that range. 1357 */ 1358 for (i = 0; map[i].linktype != -1; i++) { 1359 if (map[i].linktype == linktype) 1360 return (map[i].dlt); 1361 } 1362 1363 /* 1364 * If we don't have an entry for this LINKTYPE, return 1365 * the link type value; it may be a DLT from an newer 1366 * version of libpcap. 1367 */ 1368 return linktype; 1369 } 1370 1371 /* 1372 * Return the maximum snapshot length for a given DLT_ value. 1373 * 1374 * For most link-layer types, we use MAXIMUM_SNAPLEN. 1375 * 1376 * For DLT_DBUS, the maximum is 128MiB, as per 1377 * 1378 * https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages 1379 * 1380 * For DLT_EBHSCR, the maximum is 8MiB, as per 1381 * 1382 * https://www.elektrobit.com/ebhscr 1383 * 1384 * For DLT_USBPCAP, the maximum is 1MiB, as per 1385 * 1386 * https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15985 1387 */ 1388 u_int 1389 max_snaplen_for_dlt(int dlt) 1390 { 1391 switch (dlt) { 1392 1393 case DLT_DBUS: 1394 return 128*1024*1024; 1395 1396 case DLT_EBHSCR: 1397 return 8*1024*1024; 1398 1399 case DLT_USBPCAP: 1400 return 1024*1024; 1401 1402 default: 1403 return MAXIMUM_SNAPLEN; 1404 } 1405 } 1406