1 /* $NetBSD: pcap-common.c,v 1.1.1.4 2013/12/31 16:57:28 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 pcap-ng files 24 */ 25 26 #ifdef HAVE_CONFIG_H 27 #include "config.h" 28 #endif 29 30 #ifdef WIN32 31 #include <pcap-stdinc.h> 32 #else /* WIN32 */ 33 #if HAVE_INTTYPES_H 34 #include <inttypes.h> 35 #elif HAVE_STDINT_H 36 #include <stdint.h> 37 #endif 38 #ifdef HAVE_SYS_BITYPES_H 39 #include <sys/bitypes.h> 40 #endif 41 #include <sys/types.h> 42 #endif /* WIN32 */ 43 44 #include "pcap-int.h" 45 #include "pcap/usb.h" 46 47 #include "pcap-common.h" 48 49 /* 50 * We don't write DLT_* values to capture files, because they're not the 51 * same on all platforms. 52 * 53 * Unfortunately, the various flavors of BSD have not always used the same 54 * numerical values for the same data types, and various patches to 55 * libpcap for non-BSD OSes have added their own DLT_* codes for link 56 * layer encapsulation types seen on those OSes, and those codes have had, 57 * in some cases, values that were also used, on other platforms, for other 58 * link layer encapsulation types. 59 * 60 * This means that capture files of a type whose numerical DLT_* code 61 * means different things on different BSDs, or with different versions 62 * of libpcap, can't always be read on systems other than those like 63 * the one running on the machine on which the capture was made. 64 * 65 * Instead, we define here a set of LINKTYPE_* codes, and map DLT_* codes 66 * to LINKTYPE_* codes when writing a savefile header, and map LINKTYPE_* 67 * codes to DLT_* codes when reading a savefile header. 68 * 69 * For those DLT_* codes that have, as far as we know, the same values on 70 * all platforms (DLT_NULL through DLT_FDDI), we define LINKTYPE_xxx as 71 * DLT_xxx; that way, captures of those types can still be read by 72 * versions of libpcap that map LINKTYPE_* values to DLT_* values, and 73 * captures of those types written by versions of libpcap that map DLT_ 74 * values to LINKTYPE_ values can still be read by older versions 75 * of libpcap. 76 * 77 * The other LINKTYPE_* codes are given values starting at 100, in the 78 * hopes that no DLT_* code will be given one of those values. 79 * 80 * In order to ensure that a given LINKTYPE_* code's value will refer to 81 * the same encapsulation type on all platforms, you should not allocate 82 * a new LINKTYPE_* value without consulting 83 * "tcpdump-workers@lists.tcpdump.org". The tcpdump developers will 84 * allocate a value for you, and will not subsequently allocate it to 85 * anybody else; that value will be added to the "pcap.h" in the 86 * tcpdump.org Git repository, so that a future libpcap release will 87 * include it. 88 * 89 * You should, if possible, also contribute patches to libpcap and tcpdump 90 * to handle the new encapsulation type, so that they can also be checked 91 * into the tcpdump.org Git repository and so that they will appear in 92 * future libpcap and tcpdump releases. 93 * 94 * Do *NOT* assume that any values after the largest value in this file 95 * are available; you might not have the most up-to-date version of this 96 * file, and new values after that one might have been assigned. Also, 97 * do *NOT* use any values below 100 - those might already have been 98 * taken by one (or more!) organizations. 99 * 100 * Any platform that defines additional DLT_* codes should: 101 * 102 * request a LINKTYPE_* code and value from tcpdump.org, 103 * as per the above; 104 * 105 * add, in their version of libpcap, an entry to map 106 * those DLT_* codes to the corresponding LINKTYPE_* 107 * code; 108 * 109 * redefine, in their "net/bpf.h", any DLT_* values 110 * that collide with the values used by their additional 111 * DLT_* codes, to remove those collisions (but without 112 * making them collide with any of the LINKTYPE_* 113 * values equal to 50 or above; they should also avoid 114 * defining DLT_* values that collide with those 115 * LINKTYPE_* values, either). 116 */ 117 #define LINKTYPE_NULL DLT_NULL 118 #define LINKTYPE_ETHERNET DLT_EN10MB /* also for 100Mb and up */ 119 #define LINKTYPE_EXP_ETHERNET DLT_EN3MB /* 3Mb experimental Ethernet */ 120 #define LINKTYPE_AX25 DLT_AX25 121 #define LINKTYPE_PRONET DLT_PRONET 122 #define LINKTYPE_CHAOS DLT_CHAOS 123 #define LINKTYPE_IEEE802_5 DLT_IEEE802 /* DLT_IEEE802 is used for 802.5 Token Ring */ 124 #define LINKTYPE_ARCNET_BSD DLT_ARCNET /* BSD-style headers */ 125 #define LINKTYPE_SLIP DLT_SLIP 126 #define LINKTYPE_PPP DLT_PPP 127 #define LINKTYPE_FDDI DLT_FDDI 128 129 /* 130 * LINKTYPE_PPP is for use when there might, or might not, be an RFC 1662 131 * PPP in HDLC-like framing header (with 0xff 0x03 before the PPP protocol 132 * field) at the beginning of the packet. 133 * 134 * This is for use when there is always such a header; the address field 135 * might be 0xff, for regular PPP, or it might be an address field for Cisco 136 * point-to-point with HDLC framing as per section 4.3.1 of RFC 1547 ("Cisco 137 * HDLC"). This is, for example, what you get with NetBSD's DLT_PPP_SERIAL. 138 * 139 * We give it the same value as NetBSD's DLT_PPP_SERIAL, in the hopes that 140 * nobody else will choose a DLT_ value of 50, and so that DLT_PPP_SERIAL 141 * captures will be written out with a link type that NetBSD's tcpdump 142 * can read. 143 */ 144 #define LINKTYPE_PPP_HDLC 50 /* PPP in HDLC-like framing */ 145 146 #define LINKTYPE_PPP_ETHER 51 /* NetBSD PPP-over-Ethernet */ 147 148 #define LINKTYPE_SYMANTEC_FIREWALL 99 /* Symantec Enterprise Firewall */ 149 150 /* 151 * These correspond to DLT_s that have different values on different 152 * platforms; we map between these values in capture files and 153 * the DLT_ values as returned by pcap_datalink() and passed to 154 * pcap_open_dead(). 155 */ 156 #define LINKTYPE_ATM_RFC1483 100 /* LLC/SNAP-encapsulated ATM */ 157 #define LINKTYPE_RAW 101 /* raw IP */ 158 #define LINKTYPE_SLIP_BSDOS 102 /* BSD/OS SLIP BPF header */ 159 #define LINKTYPE_PPP_BSDOS 103 /* BSD/OS PPP BPF header */ 160 161 /* 162 * Values starting with 104 are used for newly-assigned link-layer 163 * header type values; for those link-layer header types, the DLT_ 164 * value returned by pcap_datalink() and passed to pcap_open_dead(), 165 * and the LINKTYPE_ value that appears in capture files, are the 166 * same. 167 * 168 * LINKTYPE_MATCHING_MIN is the lowest such value; LINKTYPE_MATCHING_MAX 169 * is the highest such value. 170 */ 171 #define LINKTYPE_MATCHING_MIN 104 /* lowest value in the "matching" range */ 172 173 #define LINKTYPE_C_HDLC 104 /* Cisco HDLC */ 174 #define LINKTYPE_IEEE802_11 105 /* IEEE 802.11 (wireless) */ 175 #define LINKTYPE_ATM_CLIP 106 /* Linux Classical IP over ATM */ 176 #define LINKTYPE_FRELAY 107 /* Frame Relay */ 177 #define LINKTYPE_LOOP 108 /* OpenBSD loopback */ 178 #define LINKTYPE_ENC 109 /* OpenBSD IPSEC enc */ 179 180 /* 181 * These three types are reserved for future use. 182 */ 183 #define LINKTYPE_LANE8023 110 /* ATM LANE + 802.3 */ 184 #define LINKTYPE_HIPPI 111 /* NetBSD HIPPI */ 185 #define LINKTYPE_HDLC 112 /* NetBSD HDLC framing */ 186 187 #define LINKTYPE_LINUX_SLL 113 /* Linux cooked socket capture */ 188 #define LINKTYPE_LTALK 114 /* Apple LocalTalk hardware */ 189 #define LINKTYPE_ECONET 115 /* Acorn Econet */ 190 191 /* 192 * Reserved for use with OpenBSD ipfilter. 193 */ 194 #define LINKTYPE_IPFILTER 116 195 196 #define LINKTYPE_PFLOG 117 /* OpenBSD DLT_PFLOG */ 197 #define LINKTYPE_CISCO_IOS 118 /* For Cisco-internal use */ 198 #define LINKTYPE_IEEE802_11_PRISM 119 /* 802.11 plus Prism II monitor mode radio metadata header */ 199 #define LINKTYPE_IEEE802_11_AIRONET 120 /* 802.11 plus FreeBSD Aironet driver radio metadata header */ 200 201 /* 202 * Reserved for Siemens HiPath HDLC. 203 */ 204 #define LINKTYPE_HHDLC 121 205 206 #define LINKTYPE_IP_OVER_FC 122 /* RFC 2625 IP-over-Fibre Channel */ 207 #define LINKTYPE_SUNATM 123 /* Solaris+SunATM */ 208 209 /* 210 * Reserved as per request from Kent Dahlgren <kent@praesum.com> 211 * for private use. 212 */ 213 #define LINKTYPE_RIO 124 /* RapidIO */ 214 #define LINKTYPE_PCI_EXP 125 /* PCI Express */ 215 #define LINKTYPE_AURORA 126 /* Xilinx Aurora link layer */ 216 217 #define LINKTYPE_IEEE802_11_RADIOTAP 127 /* 802.11 plus radiotap radio metadata header */ 218 219 /* 220 * Reserved for the TZSP encapsulation, as per request from 221 * Chris Waters <chris.waters@networkchemistry.com> 222 * TZSP is a generic encapsulation for any other link type, 223 * which includes a means to include meta-information 224 * with the packet, e.g. signal strength and channel 225 * for 802.11 packets. 226 */ 227 #define LINKTYPE_TZSP 128 /* Tazmen Sniffer Protocol */ 228 229 #define LINKTYPE_ARCNET_LINUX 129 /* Linux-style headers */ 230 231 /* 232 * Juniper-private data link types, as per request from 233 * Hannes Gredler <hannes@juniper.net>. The corresponding 234 * DLT_s are used for passing on chassis-internal 235 * metainformation such as QOS profiles, etc.. 236 */ 237 #define LINKTYPE_JUNIPER_MLPPP 130 238 #define LINKTYPE_JUNIPER_MLFR 131 239 #define LINKTYPE_JUNIPER_ES 132 240 #define LINKTYPE_JUNIPER_GGSN 133 241 #define LINKTYPE_JUNIPER_MFR 134 242 #define LINKTYPE_JUNIPER_ATM2 135 243 #define LINKTYPE_JUNIPER_SERVICES 136 244 #define LINKTYPE_JUNIPER_ATM1 137 245 246 #define LINKTYPE_APPLE_IP_OVER_IEEE1394 138 /* Apple IP-over-IEEE 1394 cooked header */ 247 248 #define LINKTYPE_MTP2_WITH_PHDR 139 249 #define LINKTYPE_MTP2 140 250 #define LINKTYPE_MTP3 141 251 #define LINKTYPE_SCCP 142 252 253 #define LINKTYPE_DOCSIS 143 /* DOCSIS MAC frames */ 254 255 #define LINKTYPE_LINUX_IRDA 144 /* Linux-IrDA */ 256 257 /* 258 * Reserved for IBM SP switch and IBM Next Federation switch. 259 */ 260 #define LINKTYPE_IBM_SP 145 261 #define LINKTYPE_IBM_SN 146 262 263 /* 264 * Reserved for private use. If you have some link-layer header type 265 * that you want to use within your organization, with the capture files 266 * using that link-layer header type not ever be sent outside your 267 * organization, you can use these values. 268 * 269 * No libpcap release will use these for any purpose, nor will any 270 * tcpdump release use them, either. 271 * 272 * Do *NOT* use these in capture files that you expect anybody not using 273 * your private versions of capture-file-reading tools to read; in 274 * particular, do *NOT* use them in products, otherwise you may find that 275 * people won't be able to use tcpdump, or snort, or Ethereal, or... to 276 * read capture files from your firewall/intrusion detection/traffic 277 * monitoring/etc. appliance, or whatever product uses that LINKTYPE_ value, 278 * and you may also find that the developers of those applications will 279 * not accept patches to let them read those files. 280 * 281 * Also, do not use them if somebody might send you a capture using them 282 * for *their* private type and tools using them for *your* private type 283 * would have to read them. 284 * 285 * Instead, in those cases, ask "tcpdump-workers@lists.tcpdump.org" for a 286 * new DLT_ and LINKTYPE_ value, as per the comment in pcap/bpf.h, and use 287 * the type you're given. 288 */ 289 #define LINKTYPE_USER0 147 290 #define LINKTYPE_USER1 148 291 #define LINKTYPE_USER2 149 292 #define LINKTYPE_USER3 150 293 #define LINKTYPE_USER4 151 294 #define LINKTYPE_USER5 152 295 #define LINKTYPE_USER6 153 296 #define LINKTYPE_USER7 154 297 #define LINKTYPE_USER8 155 298 #define LINKTYPE_USER9 156 299 #define LINKTYPE_USER10 157 300 #define LINKTYPE_USER11 158 301 #define LINKTYPE_USER12 159 302 #define LINKTYPE_USER13 160 303 #define LINKTYPE_USER14 161 304 #define LINKTYPE_USER15 162 305 306 /* 307 * For future use with 802.11 captures - defined by AbsoluteValue 308 * Systems to store a number of bits of link-layer information 309 * including radio information: 310 * 311 * http://www.shaftnet.org/~pizza/software/capturefrm.txt 312 */ 313 #define LINKTYPE_IEEE802_11_AVS 163 /* 802.11 plus AVS radio metadata header */ 314 315 /* 316 * Juniper-private data link type, as per request from 317 * Hannes Gredler <hannes@juniper.net>. The corresponding 318 * DLT_s are used for passing on chassis-internal 319 * metainformation such as QOS profiles, etc.. 320 */ 321 #define LINKTYPE_JUNIPER_MONITOR 164 322 323 /* 324 * BACnet MS/TP frames. 325 */ 326 #define LINKTYPE_BACNET_MS_TP 165 327 328 /* 329 * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>. 330 * 331 * This is used in some OSes to allow a kernel socket filter to distinguish 332 * between incoming and outgoing packets, on a socket intended to 333 * supply pppd with outgoing packets so it can do dial-on-demand and 334 * hangup-on-lack-of-demand; incoming packets are filtered out so they 335 * don't cause pppd to hold the connection up (you don't want random 336 * input packets such as port scans, packets from old lost connections, 337 * etc. to force the connection to stay up). 338 * 339 * The first byte of the PPP header (0xff03) is modified to accomodate 340 * the direction - 0x00 = IN, 0x01 = OUT. 341 */ 342 #define LINKTYPE_PPP_PPPD 166 343 344 /* 345 * Juniper-private data link type, as per request from 346 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 347 * for passing on chassis-internal metainformation such as 348 * QOS profiles, cookies, etc.. 349 */ 350 #define LINKTYPE_JUNIPER_PPPOE 167 351 #define LINKTYPE_JUNIPER_PPPOE_ATM 168 352 353 #define LINKTYPE_GPRS_LLC 169 /* GPRS LLC */ 354 #define LINKTYPE_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */ 355 #define LINKTYPE_GPF_F 171 /* GPF-T (ITU-T G.7041/Y.1303) */ 356 357 /* 358 * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line 359 * monitoring equipment. 360 */ 361 #define LINKTYPE_GCOM_T1E1 172 362 #define LINKTYPE_GCOM_SERIAL 173 363 364 /* 365 * Juniper-private data link type, as per request from 366 * Hannes Gredler <hannes@juniper.net>. The DLT_ is used 367 * for internal communication to Physical Interface Cards (PIC) 368 */ 369 #define LINKTYPE_JUNIPER_PIC_PEER 174 370 371 /* 372 * Link types requested by Gregor Maier <gregor@endace.com> of Endace 373 * Measurement Systems. They add an ERF header (see 374 * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of 375 * the link-layer header. 376 */ 377 #define LINKTYPE_ERF_ETH 175 /* Ethernet */ 378 #define LINKTYPE_ERF_POS 176 /* Packet-over-SONET */ 379 380 /* 381 * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD 382 * for vISDN (http://www.orlandi.com/visdn/). Its link-layer header 383 * includes additional information before the LAPD header, so it's 384 * not necessarily a generic LAPD header. 385 */ 386 #define LINKTYPE_LINUX_LAPD 177 387 388 /* 389 * Juniper-private data link type, as per request from 390 * Hannes Gredler <hannes@juniper.net>. 391 * The Link Types are used for prepending meta-information 392 * like interface index, interface name 393 * before standard Ethernet, PPP, Frelay & C-HDLC Frames 394 */ 395 #define LINKTYPE_JUNIPER_ETHER 178 396 #define LINKTYPE_JUNIPER_PPP 179 397 #define LINKTYPE_JUNIPER_FRELAY 180 398 #define LINKTYPE_JUNIPER_CHDLC 181 399 400 /* 401 * Multi Link Frame Relay (FRF.16) 402 */ 403 #define LINKTYPE_MFR 182 404 405 /* 406 * Juniper-private data link type, as per request from 407 * Hannes Gredler <hannes@juniper.net>. 408 * The DLT_ is used for internal communication with a 409 * voice Adapter Card (PIC) 410 */ 411 #define LINKTYPE_JUNIPER_VP 183 412 413 /* 414 * Arinc 429 frames. 415 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 416 * Every frame contains a 32bit A429 label. 417 * More documentation on Arinc 429 can be found at 418 * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf 419 */ 420 #define LINKTYPE_A429 184 421 422 /* 423 * Arinc 653 Interpartition Communication messages. 424 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 425 * Please refer to the A653-1 standard for more information. 426 */ 427 #define LINKTYPE_A653_ICM 185 428 429 /* 430 * USB packets, beginning with a USB setup header; requested by 431 * Paolo Abeni <paolo.abeni@email.it>. 432 */ 433 #define LINKTYPE_USB 186 434 435 /* 436 * Bluetooth HCI UART transport layer (part H:4); requested by 437 * Paolo Abeni. 438 */ 439 #define LINKTYPE_BLUETOOTH_HCI_H4 187 440 441 /* 442 * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz 443 * <cruz_petagay@bah.com>. 444 */ 445 #define LINKTYPE_IEEE802_16_MAC_CPS 188 446 447 /* 448 * USB packets, beginning with a Linux USB header; requested by 449 * Paolo Abeni <paolo.abeni@email.it>. 450 */ 451 #define LINKTYPE_USB_LINUX 189 452 453 /* 454 * Controller Area Network (CAN) v. 2.0B packets. 455 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 456 * Used to dump CAN packets coming from a CAN Vector board. 457 * More documentation on the CAN v2.0B frames can be found at 458 * http://www.can-cia.org/downloads/?269 459 */ 460 #define LINKTYPE_CAN20B 190 461 462 /* 463 * IEEE 802.15.4, with address fields padded, as is done by Linux 464 * drivers; requested by Juergen Schimmer. 465 */ 466 #define LINKTYPE_IEEE802_15_4_LINUX 191 467 468 /* 469 * Per Packet Information encapsulated packets. 470 * LINKTYPE_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 471 */ 472 #define LINKTYPE_PPI 192 473 474 /* 475 * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header; 476 * requested by Charles Clancy. 477 */ 478 #define LINKTYPE_IEEE802_16_MAC_CPS_RADIO 193 479 480 /* 481 * Juniper-private data link type, as per request from 482 * Hannes Gredler <hannes@juniper.net>. 483 * The DLT_ is used for internal communication with a 484 * integrated service module (ISM). 485 */ 486 #define LINKTYPE_JUNIPER_ISM 194 487 488 /* 489 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 490 * nothing); requested by Mikko Saarnivala <mikko.saarnivala@sensinode.com>. 491 */ 492 #define LINKTYPE_IEEE802_15_4 195 493 494 /* 495 * Various link-layer types, with a pseudo-header, for SITA 496 * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com). 497 */ 498 #define LINKTYPE_SITA 196 499 500 /* 501 * Various link-layer types, with a pseudo-header, for Endace DAG cards; 502 * encapsulates Endace ERF records. Requested by Stephen Donnelly 503 * <stephen@endace.com>. 504 */ 505 #define LINKTYPE_ERF 197 506 507 /* 508 * Special header prepended to Ethernet packets when capturing from a 509 * u10 Networks board. Requested by Phil Mulholland 510 * <phil@u10networks.com>. 511 */ 512 #define LINKTYPE_RAIF1 198 513 514 /* 515 * IPMB packet for IPMI, beginning with the I2C slave address, followed 516 * by the netFn and LUN, etc.. Requested by Chanthy Toeung 517 * <chanthy.toeung@ca.kontron.com>. 518 */ 519 #define LINKTYPE_IPMB 199 520 521 /* 522 * Juniper-private data link type, as per request from 523 * Hannes Gredler <hannes@juniper.net>. 524 * The DLT_ is used for capturing data on a secure tunnel interface. 525 */ 526 #define LINKTYPE_JUNIPER_ST 200 527 528 /* 529 * Bluetooth HCI UART transport layer (part H:4), with pseudo-header 530 * that includes direction information; requested by Paolo Abeni. 531 */ 532 #define LINKTYPE_BLUETOOTH_HCI_H4_WITH_PHDR 201 533 534 /* 535 * AX.25 packet with a 1-byte KISS header; see 536 * 537 * http://www.ax25.net/kiss.htm 538 * 539 * as per Richard Stearn <richard@rns-stearn.demon.co.uk>. 540 */ 541 #define LINKTYPE_AX25_KISS 202 542 543 /* 544 * LAPD packets from an ISDN channel, starting with the address field, 545 * with no pseudo-header. 546 * Requested by Varuna De Silva <varunax@gmail.com>. 547 */ 548 #define LINKTYPE_LAPD 203 549 550 /* 551 * Variants of various link-layer headers, with a one-byte direction 552 * pseudo-header prepended - zero means "received by this host", 553 * non-zero (any non-zero value) means "sent by this host" - as per 554 * Will Barker <w.barker@zen.co.uk>. 555 */ 556 #define LINKTYPE_PPP_WITH_DIR 204 /* PPP */ 557 #define LINKTYPE_C_HDLC_WITH_DIR 205 /* Cisco HDLC */ 558 #define LINKTYPE_FRELAY_WITH_DIR 206 /* Frame Relay */ 559 #define LINKTYPE_LAPB_WITH_DIR 207 /* LAPB */ 560 561 /* 562 * 208 is reserved for an as-yet-unspecified proprietary link-layer 563 * type, as requested by Will Barker. 564 */ 565 566 /* 567 * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman 568 * <avn@pigeonpoint.com>. 569 */ 570 #define LINKTYPE_IPMB_LINUX 209 571 572 /* 573 * FlexRay automotive bus - http://www.flexray.com/ - as requested 574 * by Hannes Kaelber <hannes.kaelber@x2e.de>. 575 */ 576 #define LINKTYPE_FLEXRAY 210 577 578 /* 579 * Media Oriented Systems Transport (MOST) bus for multimedia 580 * transport - http://www.mostcooperation.com/ - as requested 581 * by Hannes Kaelber <hannes.kaelber@x2e.de>. 582 */ 583 #define LINKTYPE_MOST 211 584 585 /* 586 * Local Interconnect Network (LIN) bus for vehicle networks - 587 * http://www.lin-subbus.org/ - as requested by Hannes Kaelber 588 * <hannes.kaelber@x2e.de>. 589 */ 590 #define LINKTYPE_LIN 212 591 592 /* 593 * X2E-private data link type used for serial line capture, 594 * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. 595 */ 596 #define LINKTYPE_X2E_SERIAL 213 597 598 /* 599 * X2E-private data link type used for the Xoraya data logger 600 * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. 601 */ 602 #define LINKTYPE_X2E_XORAYA 214 603 604 /* 605 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 606 * nothing), but with the PHY-level data for non-ASK PHYs (4 octets 607 * of 0 as preamble, one octet of SFD, one octet of frame length+ 608 * reserved bit, and then the MAC-layer data, starting with the 609 * frame control field). 610 * 611 * Requested by Max Filippov <jcmvbkbc@gmail.com>. 612 */ 613 #define LINKTYPE_IEEE802_15_4_NONASK_PHY 215 614 615 /* 616 * David Gibson <david@gibson.dropbear.id.au> requested this for 617 * captures from the Linux kernel /dev/input/eventN devices. This 618 * is used to communicate keystrokes and mouse movements from the 619 * Linux kernel to display systems, such as Xorg. 620 */ 621 #define LINKTYPE_LINUX_EVDEV 216 622 623 /* 624 * GSM Um and Abis interfaces, preceded by a "gsmtap" header. 625 * 626 * Requested by Harald Welte <laforge@gnumonks.org>. 627 */ 628 #define LINKTYPE_GSMTAP_UM 217 629 #define LINKTYPE_GSMTAP_ABIS 218 630 631 /* 632 * MPLS, with an MPLS label as the link-layer header. 633 * Requested by Michele Marchetto <michele@openbsd.org> on behalf 634 * of OpenBSD. 635 */ 636 #define LINKTYPE_MPLS 219 637 638 /* 639 * USB packets, beginning with a Linux USB header, with the USB header 640 * padded to 64 bytes; required for memory-mapped access. 641 */ 642 #define LINKTYPE_USB_LINUX_MMAPPED 220 643 644 /* 645 * DECT packets, with a pseudo-header; requested by 646 * Matthias Wenzel <tcpdump@mazzoo.de>. 647 */ 648 #define LINKTYPE_DECT 221 649 650 /* 651 * From: "Lidwa, Eric (GSFC-582.0)[SGT INC]" <eric.lidwa-1@nasa.gov> 652 * Date: Mon, 11 May 2009 11:18:30 -0500 653 * 654 * DLT_AOS. We need it for AOS Space Data Link Protocol. 655 * I have already written dissectors for but need an OK from 656 * legal before I can submit a patch. 657 * 658 */ 659 #define LINKTYPE_AOS 222 660 661 /* 662 * Wireless HART (Highway Addressable Remote Transducer) 663 * From the HART Communication Foundation 664 * IES/PAS 62591 665 * 666 * Requested by Sam Roberts <vieuxtech@gmail.com>. 667 */ 668 #define LINKTYPE_WIHART 223 669 670 /* 671 * Fibre Channel FC-2 frames, beginning with a Frame_Header. 672 * Requested by Kahou Lei <kahou82@gmail.com>. 673 */ 674 #define LINKTYPE_FC_2 224 675 676 /* 677 * Fibre Channel FC-2 frames, beginning with an encoding of the 678 * SOF, and ending with an encoding of the EOF. 679 * 680 * The encodings represent the frame delimiters as 4-byte sequences 681 * representing the corresponding ordered sets, with K28.5 682 * represented as 0xBC, and the D symbols as the corresponding 683 * byte values; for example, SOFi2, which is K28.5 - D21.5 - D1.2 - D21.2, 684 * is represented as 0xBC 0xB5 0x55 0x55. 685 * 686 * Requested by Kahou Lei <kahou82@gmail.com>. 687 */ 688 #define LINKTYPE_FC_2_WITH_FRAME_DELIMS 225 689 690 /* 691 * Solaris ipnet pseudo-header; requested by Darren Reed <Darren.Reed@Sun.COM>. 692 * 693 * The pseudo-header starts with a one-byte version number; for version 2, 694 * the pseudo-header is: 695 * 696 * struct dl_ipnetinfo { 697 * u_int8_t dli_version; 698 * u_int8_t dli_family; 699 * u_int16_t dli_htype; 700 * u_int32_t dli_pktlen; 701 * u_int32_t dli_ifindex; 702 * u_int32_t dli_grifindex; 703 * u_int32_t dli_zsrc; 704 * u_int32_t dli_zdst; 705 * }; 706 * 707 * dli_version is 2 for the current version of the pseudo-header. 708 * 709 * dli_family is a Solaris address family value, so it's 2 for IPv4 710 * and 26 for IPv6. 711 * 712 * dli_htype is a "hook type" - 0 for incoming packets, 1 for outgoing 713 * packets, and 2 for packets arriving from another zone on the same 714 * machine. 715 * 716 * dli_pktlen is the length of the packet data following the pseudo-header 717 * (so the captured length minus dli_pktlen is the length of the 718 * pseudo-header, assuming the entire pseudo-header was captured). 719 * 720 * dli_ifindex is the interface index of the interface on which the 721 * packet arrived. 722 * 723 * dli_grifindex is the group interface index number (for IPMP interfaces). 724 * 725 * dli_zsrc is the zone identifier for the source of the packet. 726 * 727 * dli_zdst is the zone identifier for the destination of the packet. 728 * 729 * A zone number of 0 is the global zone; a zone number of 0xffffffff 730 * means that the packet arrived from another host on the network, not 731 * from another zone on the same machine. 732 * 733 * An IPv4 or IPv6 datagram follows the pseudo-header; dli_family indicates 734 * which of those it is. 735 */ 736 #define LINKTYPE_IPNET 226 737 738 /* 739 * CAN (Controller Area Network) frames, with a pseudo-header as supplied 740 * by Linux SocketCAN. See Documentation/networking/can.txt in the Linux 741 * source. 742 * 743 * Requested by Felix Obenhuber <felix@obenhuber.de>. 744 */ 745 #define LINKTYPE_CAN_SOCKETCAN 227 746 747 /* 748 * Raw IPv4/IPv6; different from DLT_RAW in that the DLT_ value specifies 749 * whether it's v4 or v6. Requested by Darren Reed <Darren.Reed@Sun.COM>. 750 */ 751 #define LINKTYPE_IPV4 228 752 #define LINKTYPE_IPV6 229 753 754 /* 755 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 756 * nothing), and with no FCS at the end of the frame; requested by 757 * Jon Smirl <jonsmirl@gmail.com>. 758 */ 759 #define LINKTYPE_IEEE802_15_4_NOFCS 230 760 761 /* 762 * Raw D-Bus: 763 * 764 * http://www.freedesktop.org/wiki/Software/dbus 765 * 766 * messages: 767 * 768 * http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages 769 * 770 * starting with the endianness flag, followed by the message type, etc., 771 * but without the authentication handshake before the message sequence: 772 * 773 * http://dbus.freedesktop.org/doc/dbus-specification.html#auth-protocol 774 * 775 * Requested by Martin Vidner <martin@vidner.net>. 776 */ 777 #define LINKTYPE_DBUS 231 778 779 /* 780 * Juniper-private data link type, as per request from 781 * Hannes Gredler <hannes@juniper.net>. 782 */ 783 #define LINKTYPE_JUNIPER_VS 232 784 #define LINKTYPE_JUNIPER_SRX_E2E 233 785 #define LINKTYPE_JUNIPER_FIBRECHANNEL 234 786 787 /* 788 * DVB-CI (DVB Common Interface for communication between a PC Card 789 * module and a DVB receiver). See 790 * 791 * http://www.kaiser.cx/pcap-dvbci.html 792 * 793 * for the specification. 794 * 795 * Requested by Martin Kaiser <martin@kaiser.cx>. 796 */ 797 #define LINKTYPE_DVB_CI 235 798 799 /* 800 * Variant of 3GPP TS 27.010 multiplexing protocol. Requested 801 * by Hans-Christoph Schemmel <hans-christoph.schemmel@cinterion.com>. 802 */ 803 #define LINKTYPE_MUX27010 236 804 805 /* 806 * STANAG 5066 D_PDUs. Requested by M. Baris Demiray 807 * <barisdemiray@gmail.com>. 808 */ 809 #define LINKTYPE_STANAG_5066_D_PDU 237 810 811 /* 812 * Juniper-private data link type, as per request from 813 * Hannes Gredler <hannes@juniper.net>. 814 */ 815 #define LINKTYPE_JUNIPER_ATM_CEMIC 238 816 817 /* 818 * NetFilter LOG messages 819 * (payload of netlink NFNL_SUBSYS_ULOG/NFULNL_MSG_PACKET packets) 820 * 821 * Requested by Jakub Zawadzki <darkjames-ws@darkjames.pl> 822 */ 823 #define LINKTYPE_NFLOG 239 824 825 /* 826 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type 827 * for Ethernet packets with a 4-byte pseudo-header and always 828 * with the payload including the FCS, as supplied by their 829 * netANALYZER hardware and software. 830 * 831 * Requested by Holger P. Frommer <HPfrommer@hilscher.com> 832 */ 833 #define LINKTYPE_NETANALYZER 240 834 835 /* 836 * Hilscher Gesellschaft fuer Systemautomation mbH link-layer type 837 * for Ethernet packets with a 4-byte pseudo-header and FCS and 838 * 1 byte of SFD, as supplied by their netANALYZER hardware and 839 * software. 840 * 841 * Requested by Holger P. Frommer <HPfrommer@hilscher.com> 842 */ 843 #define LINKTYPE_NETANALYZER_TRANSPARENT 241 844 845 /* 846 * IP-over-InfiniBand, as specified by RFC 4391. 847 * 848 * Requested by Petr Sumbera <petr.sumbera@oracle.com>. 849 */ 850 #define LINKTYPE_IPOIB 242 851 852 /* 853 * MPEG-2 transport stream (ISO 13818-1/ITU-T H.222.0). 854 * 855 * Requested by Guy Martin <gmsoft@tuxicoman.be>. 856 */ 857 #define LINKTYPE_MPEG_2_TS 243 858 859 /* 860 * ng4T GmbH's UMTS Iub/Iur-over-ATM and Iub/Iur-over-IP format as 861 * used by their ng40 protocol tester. 862 * 863 * Requested by Jens Grimmer <jens.grimmer@ng4t.com>. 864 */ 865 #define LINKTYPE_NG40 244 866 867 /* 868 * Pseudo-header giving adapter number and flags, followed by an NFC 869 * (Near-Field Communications) Logical Link Control Protocol (LLCP) PDU, 870 * as specified by NFC Forum Logical Link Control Protocol Technical 871 * Specification LLCP 1.1. 872 * 873 * Requested by Mike Wakerly <mikey@google.com>. 874 */ 875 #define LINKTYPE_NFC_LLCP 245 876 877 /* 878 * pfsync output; DLT_PFSYNC is 18, which collides with DLT_CIP in 879 * SuSE 6.3, on OpenBSD, NetBSD, DragonFly BSD, and Mac OS X, and 880 * is 121, which collides with DLT_HHDLC, in FreeBSD. We pick a 881 * shiny new link-layer header type value that doesn't collide with 882 * anything, in the hopes that future pfsync savefiles, if any, 883 * won't require special hacks to distinguish from other savefiles. 884 * 885 */ 886 #define LINKTYPE_PFSYNC 246 887 888 /* 889 * Raw InfiniBand packets, starting with the Local Routing Header. 890 * 891 * Requested by Oren Kladnitsky <orenk@mellanox.com>. 892 */ 893 #define LINKTYPE_INFINIBAND 247 894 895 /* 896 * SCTP, with no lower-level protocols (i.e., no IPv4 or IPv6). 897 * 898 * Requested by Michael Tuexen <Michael.Tuexen@lurchi.franken.de>. 899 */ 900 #define LINKTYPE_SCTP 248 901 902 /* 903 * USB packets, beginning with a USBPcap header. 904 * 905 * Requested by Tomasz Mon <desowin@gmail.com> 906 */ 907 #define LINKTYPE_USBPCAP 249 908 909 /* 910 * Schweitzer Engineering Laboratories "RTAC" product serial-line 911 * packets. 912 * 913 * Requested by Chris Bontje <chris_bontje@selinc.com>. 914 */ 915 #define DLT_RTAC_SERIAL 250 916 917 /* 918 * Bluetooth Low Energy air interface link-layer packets. 919 * 920 * Requested by Mike Kershaw <dragorn@kismetwireless.net>. 921 */ 922 #define LINKTYPE_BLUETOOTH_LE_LL 251 923 924 /* 925 * Link-layer header type for upper-protocol layer PDU saves from wireshark. 926 * 927 * the actual contents are determined by two TAGs stored with each 928 * packet: 929 * EXP_PDU_TAG_LINKTYPE the link type (LINKTYPE_ value) of the 930 * original packet. 931 * 932 * EXP_PDU_TAG_PROTO_NAME the name of the wireshark dissector 933 * that can make sense of the data stored. 934 */ 935 #define LINKTYPE_WIRESHARK_UPPER_PDU 252 936 937 #define LINKTYPE_MATCHING_MAX 252 /* highest value in the "matching" range */ 938 939 static struct linktype_map { 940 int dlt; 941 int linktype; 942 } map[] = { 943 /* 944 * These DLT_* codes have LINKTYPE_* codes with values identical 945 * to the values of the corresponding DLT_* code. 946 */ 947 { DLT_NULL, LINKTYPE_NULL }, 948 { DLT_EN10MB, LINKTYPE_ETHERNET }, 949 { DLT_EN3MB, LINKTYPE_EXP_ETHERNET }, 950 { DLT_AX25, LINKTYPE_AX25 }, 951 { DLT_PRONET, LINKTYPE_PRONET }, 952 { DLT_CHAOS, LINKTYPE_CHAOS }, 953 { DLT_IEEE802, LINKTYPE_IEEE802_5 }, 954 { DLT_ARCNET, LINKTYPE_ARCNET_BSD }, 955 { DLT_SLIP, LINKTYPE_SLIP }, 956 { DLT_PPP, LINKTYPE_PPP }, 957 { DLT_FDDI, LINKTYPE_FDDI }, 958 { DLT_SYMANTEC_FIREWALL, LINKTYPE_SYMANTEC_FIREWALL }, 959 960 /* 961 * These DLT_* codes have different values on different 962 * platforms; we map them to LINKTYPE_* codes that 963 * have values that should never be equal to any DLT_* 964 * code. 965 */ 966 #ifdef DLT_FR 967 /* BSD/OS Frame Relay */ 968 { DLT_FR, LINKTYPE_FRELAY }, 969 #endif 970 971 { DLT_ATM_RFC1483, LINKTYPE_ATM_RFC1483 }, 972 { DLT_RAW, LINKTYPE_RAW }, 973 { DLT_SLIP_BSDOS, LINKTYPE_SLIP_BSDOS }, 974 { DLT_PPP_BSDOS, LINKTYPE_PPP_BSDOS }, 975 976 /* BSD/OS Cisco HDLC */ 977 { DLT_C_HDLC, LINKTYPE_C_HDLC }, 978 979 /* 980 * These DLT_* codes are not on all platforms, but, so far, 981 * there don't appear to be any platforms that define 982 * other codes with those values; we map them to 983 * different LINKTYPE_* values anyway, just in case. 984 */ 985 986 /* Linux ATM Classical IP */ 987 { DLT_ATM_CLIP, LINKTYPE_ATM_CLIP }, 988 989 /* NetBSD sync/async serial PPP (or Cisco HDLC) */ 990 { DLT_PPP_SERIAL, LINKTYPE_PPP_HDLC }, 991 992 /* NetBSD PPP over Ethernet */ 993 { DLT_PPP_ETHER, LINKTYPE_PPP_ETHER }, 994 995 /* 996 * All LINKTYPE_ values between LINKTYPE_MATCHING_MIN 997 * and LINKTYPE_MATCHING_MAX are mapped to identical 998 * DLT_ values. 999 */ 1000 1001 { -1, -1 } 1002 }; 1003 1004 int 1005 dlt_to_linktype(int dlt) 1006 { 1007 int i; 1008 1009 /* 1010 * Map DLT_PFSYNC, whatever it might be, to LINKTYPE_PFSYNC. 1011 */ 1012 if (dlt == DLT_PFSYNC) 1013 return (LINKTYPE_PFSYNC); 1014 1015 /* 1016 * Map the values in the matching range. 1017 */ 1018 if (dlt >= DLT_MATCHING_MIN && dlt <= DLT_MATCHING_MAX) 1019 return (dlt); 1020 1021 /* 1022 * Map the values outside that range. 1023 */ 1024 for (i = 0; map[i].dlt != -1; i++) { 1025 if (map[i].dlt == dlt) 1026 return (map[i].linktype); 1027 } 1028 1029 /* 1030 * If we don't have a mapping for this DLT_ code, return an 1031 * error; that means that this is a value with no corresponding 1032 * LINKTYPE_ code, and we need to assign one. 1033 */ 1034 return (-1); 1035 } 1036 1037 int 1038 linktype_to_dlt(int linktype) 1039 { 1040 int i; 1041 1042 /* 1043 * Map LINKTYPE_PFSYNC to DLT_PFSYNC, whatever it might be. 1044 * LINKTYPE_PFSYNC is in the matching range, to make sure 1045 * it's as safe from reuse as we can arrange, so we do 1046 * this test first. 1047 */ 1048 if (linktype == LINKTYPE_PFSYNC) 1049 return (DLT_PFSYNC); 1050 1051 /* 1052 * Map the values in the matching range. 1053 */ 1054 if (linktype >= LINKTYPE_MATCHING_MIN && 1055 linktype <= LINKTYPE_MATCHING_MAX) 1056 return (linktype); 1057 1058 /* 1059 * Map the values outside that range. 1060 */ 1061 for (i = 0; map[i].linktype != -1; i++) { 1062 if (map[i].linktype == linktype) 1063 return (map[i].dlt); 1064 } 1065 1066 /* 1067 * If we don't have an entry for this link type, return 1068 * the link type value; it may be a DLT_ value from an 1069 * older version of libpcap. 1070 */ 1071 return linktype; 1072 } 1073 1074 /* 1075 * The DLT_USB_LINUX and DLT_USB_LINUX_MMAPPED headers are in host 1076 * byte order when capturing (it's supplied directly from a 1077 * memory-mapped buffer shared by the kernel). 1078 * 1079 * When reading a DLT_USB_LINUX or DLT_USB_LINUX_MMAPPED capture file, 1080 * we need to convert it from the capturing host's byte order to 1081 * the reading host's byte order. 1082 */ 1083 void 1084 swap_linux_usb_header(const struct pcap_pkthdr *hdr, u_char *buf, 1085 int header_len_64_bytes) 1086 { 1087 pcap_usb_header_mmapped *uhdr = (pcap_usb_header_mmapped *)buf; 1088 bpf_u_int32 offset = 0; 1089 usb_isodesc *pisodesc; 1090 int32_t numdesc, i; 1091 1092 /* 1093 * "offset" is the offset *past* the field we're swapping; 1094 * we skip the field *before* checking to make sure 1095 * the captured data length includes the entire field. 1096 */ 1097 1098 /* 1099 * The URB id is a totally opaque value; do we really need to 1100 * convert it to the reading host's byte order??? 1101 */ 1102 offset += 8; /* skip past id */ 1103 if (hdr->caplen < offset) 1104 return; 1105 uhdr->id = SWAPLL(uhdr->id); 1106 1107 offset += 4; /* skip past various 1-byte fields */ 1108 1109 offset += 2; /* skip past bus_id */ 1110 if (hdr->caplen < offset) 1111 return; 1112 uhdr->bus_id = SWAPSHORT(uhdr->bus_id); 1113 1114 offset += 2; /* skip past various 1-byte fields */ 1115 1116 offset += 8; /* skip past ts_sec */ 1117 if (hdr->caplen < offset) 1118 return; 1119 uhdr->ts_sec = SWAPLL(uhdr->ts_sec); 1120 1121 offset += 4; /* skip past ts_usec */ 1122 if (hdr->caplen < offset) 1123 return; 1124 uhdr->ts_usec = SWAPLONG(uhdr->ts_usec); 1125 1126 offset += 4; /* skip past status */ 1127 if (hdr->caplen < offset) 1128 return; 1129 uhdr->status = SWAPLONG(uhdr->status); 1130 1131 offset += 4; /* skip past urb_len */ 1132 if (hdr->caplen < offset) 1133 return; 1134 uhdr->urb_len = SWAPLONG(uhdr->urb_len); 1135 1136 offset += 4; /* skip past data_len */ 1137 if (hdr->caplen < offset) 1138 return; 1139 uhdr->data_len = SWAPLONG(uhdr->data_len); 1140 1141 if (uhdr->transfer_type == URB_ISOCHRONOUS) { 1142 offset += 4; /* skip past s.iso.error_count */ 1143 if (hdr->caplen < offset) 1144 return; 1145 uhdr->s.iso.error_count = SWAPLONG(uhdr->s.iso.error_count); 1146 1147 offset += 4; /* skip past s.iso.numdesc */ 1148 if (hdr->caplen < offset) 1149 return; 1150 uhdr->s.iso.numdesc = SWAPLONG(uhdr->s.iso.numdesc); 1151 } else 1152 offset += 8; /* skip USB setup header */ 1153 1154 if (header_len_64_bytes) { 1155 /* 1156 * This is either the "version 1" header, with 1157 * 16 bytes of additional fields at the end, or 1158 * a "version 0" header from a memory-mapped 1159 * capture, with 16 bytes of zeroed-out padding 1160 * at the end. Byte swap them as if this were 1161 * a "version 1" header. 1162 */ 1163 offset += 4; /* skip past interval */ 1164 if (hdr->caplen < offset) 1165 return; 1166 uhdr->interval = SWAPLONG(uhdr->interval); 1167 1168 offset += 4; /* skip past start_frame */ 1169 if (hdr->caplen < offset) 1170 return; 1171 uhdr->start_frame = SWAPLONG(uhdr->start_frame); 1172 1173 offset += 4; /* skip past xfer_flags */ 1174 if (hdr->caplen < offset) 1175 return; 1176 uhdr->xfer_flags = SWAPLONG(uhdr->xfer_flags); 1177 1178 offset += 4; /* skip past ndesc */ 1179 if (hdr->caplen < offset) 1180 return; 1181 uhdr->ndesc = SWAPLONG(uhdr->ndesc); 1182 } 1183 1184 if (uhdr->transfer_type == URB_ISOCHRONOUS) { 1185 /* swap the values in struct linux_usb_isodesc */ 1186 pisodesc = (usb_isodesc *)(void *)(buf+offset); 1187 numdesc = uhdr->s.iso.numdesc; 1188 for (i = 0; i < numdesc; i++) { 1189 offset += 4; /* skip past status */ 1190 if (hdr->caplen < offset) 1191 return; 1192 pisodesc->status = SWAPLONG(pisodesc->status); 1193 1194 offset += 4; /* skip past offset */ 1195 if (hdr->caplen < offset) 1196 return; 1197 pisodesc->offset = SWAPLONG(pisodesc->offset); 1198 1199 offset += 4; /* skip past len */ 1200 if (hdr->caplen < offset) 1201 return; 1202 pisodesc->len = SWAPLONG(pisodesc->len); 1203 1204 offset += 4; /* skip past padding */ 1205 1206 pisodesc++; 1207 } 1208 } 1209 } 1210