2 * Code common to libpcap and pcap-NG file formats
7 * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
9 * File format support for pcap-ng file format
10 * Copyright (c) 2007 by Ulf Lamping <ulf.lamping@web.de>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
35 #include "file_wrappers.h"
37 #include "pcap-common.h"
40 * Map link-layer types (LINKTYPE_ values) to Wiretap encapsulations.
43 * Either LBL NRG wasn't an adequate central registry (e.g., because of
44 * the slow rate of releases from them), or nobody bothered using them
45 * as a central registry, as many different groups have patched libpcap
46 * (and BPF, on the BSDs) to add new encapsulation types, and have ended
47 * up using the same DLT_ values for different encapsulation types.
49 * For those numerical encapsulation type values that everybody uses for
50 * the same encapsulation type (which inclues those that some platforms
51 * specify different DLT_ names for but don't appear to use), we map
52 * those values to the appropriate Wiretap values.
54 * For those numerical encapsulation type values that different libpcap
55 * variants use for different encapsulation types, we check what
56 * <pcap.h> defined to determine how to interpret them, so that we
57 * interpret them the way the libpcap with which we're building
58 * Wireshark/Wiretap interprets them (which, if it doesn't support
59 * them at all, means we don't support them either - any capture files
60 * using them are foreign, and we don't hazard a guess as to which
61 * platform they came from; we could, I guess, choose the most likely
64 * Note: if you need a new encapsulation type for libpcap files, do
65 * *N*O*T* use *ANY* of the values listed here! I.e., do *NOT*
66 * add a new encapsulation type by changing an existing entry;
67 * leave the existing entries alone.
69 * Instead, send mail to tcpdump-workers@lists.tcpdump.org, asking for
70 * a new DLT_ value, and specifying the purpose of the new value. When
71 * you get the new DLT_ value, use that numerical value in the "dlt_value"
72 * field of "pcap_to_wtap_map[]".
78 } pcap_to_wtap_map[] = {
80 * These are the values that are almost certainly the same
81 * in all libpcaps (I've yet to find one where the values
82 * in question are used for some purpose other than the
83 * one below, but...), and that Wiretap and Wireshark
86 { 0, WTAP_ENCAP_NULL }, /* null encapsulation */
87 { 1, WTAP_ENCAP_ETHERNET },
88 { 6, WTAP_ENCAP_TOKEN_RING }, /* IEEE 802 Networks - assume token ring */
89 { 7, WTAP_ENCAP_ARCNET },
90 { 8, WTAP_ENCAP_SLIP },
91 { 9, WTAP_ENCAP_PPP },
92 #ifdef BIT_SWAPPED_MAC_ADDRS
93 { 10, WTAP_ENCAP_FDDI_BITSWAPPED },
95 { 10, WTAP_ENCAP_FDDI },
98 { 32, WTAP_ENCAP_REDBACK },
101 * 50 is DLT_PPP_SERIAL in NetBSD; it appears that DLT_PPP
102 * on BSD (at least according to standard tcpdump) has, as
103 * the first octet, an indication of whether the packet was
104 * transmitted or received (rather than having the standard
105 * PPP address value of 0xff), but that DLT_PPP_SERIAL puts
106 * a real live PPP header there, or perhaps a Cisco PPP header
107 * as per section 4.3.1 of RFC 1547 (implementations of this
108 * exist in various BSDs in "sys/net/if_spppsubr.c", and
109 * I think also exist either in standard Linux or in
110 * various Linux patches; the implementations show how to handle
111 * Cisco keepalive packets).
113 * However, I don't see any obvious place in FreeBSD "if_ppp.c"
114 * where anything other than the standard PPP header would be
115 * passed up. I see some stuff that sets the first octet
116 * to 0 for incoming and 1 for outgoing packets before applying
117 * a BPF filter to see whether to drop packets whose protocol
118 * field has the 0x8000 bit set, i.e. network control protocols -
119 * those are handed up to userland - but that code puts the
120 * address field back before passing the packet up.
122 * I also don't see anything immediately obvious that munges
123 * the address field for sync PPP, either.
125 * Wireshark currently assumes that if the first octet of a
126 * PPP frame is 0xFF, it's the address field and is followed
127 * by a control field and a 2-byte protocol, otherwise the
128 * address and control fields are absent and the frame begins
129 * with a protocol field. If we ever see a BSD/OS PPP
130 * capture, we'll have to handle it differently, and we may
131 * have to handle standard BSD captures differently if, in fact,
132 * they don't have 0xff 0x03 as the first two bytes - but, as per
133 * the two paragraphs preceding this, it's not clear that
134 * the address field *is* munged into an incoming/outgoing
135 * field when the packet is handed to the BPF device.
137 * For now, we just map DLT_PPP_SERIAL to WTAP_ENCAP_PPP, as
138 * we treat WTAP_ENCAP_PPP packets as if those beginning with
139 * 0xff have the standard RFC 1662 "PPP in HDLC-like Framing"
140 * 0xff 0x03 address/control header, and DLT_PPP_SERIAL frames
141 * appear to contain that unless they're Cisco frames (if we
142 * ever see a capture with them, we'd need to implement the
143 * RFC 1547 stuff, and the keepalive protocol stuff).
145 * We may have to distinguish between "PPP where if it doesn't
146 * begin with 0xff there's no HDLC encapsulation and the frame
147 * begins with the protocol field" (which is how we handle
148 * WTAP_ENCAP_PPP now) and "PPP where there's either HDLC
149 * encapsulation or Cisco PPP" (which is what DLT_PPP_SERIAL
152 * XXX - NetBSD has DLT_HDLC, which appears to be used for
153 * Cisco HDLC. Ideally, they should use DLT_PPP_SERIAL
154 * only for real live HDLC-encapsulated PPP, not for Cisco
157 { 50, WTAP_ENCAP_PPP },
160 * Apparently used by the Axent Raptor firewall (now Symantec
161 * Enterprise Firewall).
162 * Thanks, Axent, for not reserving that type with tcpdump.org
163 * and not telling anybody about it.
165 { 99, WTAP_ENCAP_SYMANTEC },
168 * These are the values that libpcap 0.5 and later use in
169 * capture file headers, in an attempt to work around the
170 * confusion decried above, and that Wiretap and Wireshark
173 { 100, WTAP_ENCAP_ATM_RFC1483 },
174 { 101, WTAP_ENCAP_RAW_IP },
177 * More values used by libpcap 0.5 as DLT_ values and used by the
178 * current CVS version of libpcap in capture file headers.
179 * They are not yet handled in Wireshark.
180 * If we get a capture that contains them, we'll implement them.
182 { 102, WTAP_ENCAP_SLIP_BSDOS },
183 { 103, WTAP_ENCAP_PPP_BSDOS },
187 * These ones are handled in Wireshark, though.
189 { 104, WTAP_ENCAP_CHDLC }, /* Cisco HDLC */
190 { 105, WTAP_ENCAP_IEEE_802_11 }, /* IEEE 802.11 */
191 { 106, WTAP_ENCAP_LINUX_ATM_CLIP },
192 { 107, WTAP_ENCAP_FRELAY }, /* Frame Relay */
193 { 108, WTAP_ENCAP_NULL }, /* OpenBSD loopback */
194 { 109, WTAP_ENCAP_ENC }, /* OpenBSD IPSEC enc */
196 { 110, WTAP_ENCAP_LANE_802_3 },/* ATM LANE 802.3 */
197 { 111, WTAP_ENCAP_HIPPI }, /* NetBSD HIPPI */
199 { 112, WTAP_ENCAP_CHDLC }, /* NetBSD HDLC framing */
202 * Linux "cooked mode" captures, used by the current CVS version
205 * it could be a packet in Cisco's ERSPAN encapsulation which uses
206 * this number as well (why can't people stick to protocols when it
207 * comes to allocating/using DLT types).
209 { 113, WTAP_ENCAP_SLL }, /* Linux cooked capture */
211 { 114, WTAP_ENCAP_LOCALTALK }, /* Localtalk */
214 * The tcpdump.org version of libpcap uses 117, rather than 17,
215 * for OpenBSD packet filter logging, so as to avoid conflicting
216 * with DLT_LANE8023 in SuSE 6.3 libpcap.
218 { 117, WTAP_ENCAP_PFLOG },
220 { 118, WTAP_ENCAP_CISCO_IOS },
221 { 119, WTAP_ENCAP_PRISM_HEADER }, /* Prism monitor mode hdr */
222 { 121, WTAP_ENCAP_HHDLC }, /* HiPath HDLC */
223 { 122, WTAP_ENCAP_IP_OVER_FC }, /* RFC 2625 IP-over-FC */
224 { 123, WTAP_ENCAP_ATM_PDUS }, /* SunATM */
225 { 127, WTAP_ENCAP_IEEE_802_11_WLAN_RADIOTAP }, /* 802.11 plus radiotap WLAN header */
226 { 128, WTAP_ENCAP_TZSP }, /* Tazmen Sniffer Protocol */
227 { 129, WTAP_ENCAP_ARCNET_LINUX },
228 { 130, WTAP_ENCAP_JUNIPER_MLPPP }, /* Juniper MLPPP on ML-, LS-, AS- PICs */
229 { 131, WTAP_ENCAP_JUNIPER_MLFR }, /* Juniper MLFR (FRF.15) on ML-, LS-, AS- PICs */
230 { 133, WTAP_ENCAP_JUNIPER_GGSN},
232 * Values 132-134, 136 not listed here are reserved for use
233 * in Juniper hardware.
235 { 135, WTAP_ENCAP_JUNIPER_ATM2 }, /* various encapsulations captured on the ATM2 PIC */
236 { 137, WTAP_ENCAP_JUNIPER_ATM1 }, /* various encapsulations captured on the ATM1 PIC */
238 { 138, WTAP_ENCAP_APPLE_IP_OVER_IEEE1394 },
239 /* Apple IP-over-IEEE 1394 */
241 { 139, WTAP_ENCAP_MTP2_WITH_PHDR },
242 { 140, WTAP_ENCAP_MTP2 },
243 { 141, WTAP_ENCAP_MTP3 },
244 { 142, WTAP_ENCAP_SCCP },
245 { 143, WTAP_ENCAP_DOCSIS },
246 { 144, WTAP_ENCAP_IRDA }, /* IrDA capture */
248 /* Reserved for private use. */
249 { 147, WTAP_ENCAP_USER0 },
250 { 148, WTAP_ENCAP_USER1 },
251 { 149, WTAP_ENCAP_USER2 },
252 { 150, WTAP_ENCAP_USER3 },
253 { 151, WTAP_ENCAP_USER4 },
254 { 152, WTAP_ENCAP_USER5 },
255 { 153, WTAP_ENCAP_USER6 },
256 { 154, WTAP_ENCAP_USER7 },
257 { 155, WTAP_ENCAP_USER8 },
258 { 156, WTAP_ENCAP_USER9 },
259 { 157, WTAP_ENCAP_USER10 },
260 { 158, WTAP_ENCAP_USER11 },
261 { 159, WTAP_ENCAP_USER12 },
262 { 160, WTAP_ENCAP_USER13 },
263 { 161, WTAP_ENCAP_USER14 },
264 { 162, WTAP_ENCAP_USER15 },
266 { 163, WTAP_ENCAP_IEEE_802_11_WLAN_AVS }, /* 802.11 plus AVS WLAN header */
269 * 164 is reserved for Juniper-private chassis-internal
270 * meta-information such as QoS profiles, etc..
273 { 165, WTAP_ENCAP_BACNET_MS_TP },
276 * 166 is reserved for a PPP variant in which the first byte
277 * of the 0xff03 header, the 0xff, is replaced by a direction
278 * byte. I don't know whether any captures look like that,
279 * but it is used for some Linux IP filtering (ipfilter?).
282 /* Ethernet PPPoE frames captured on a service PIC */
283 { 167, WTAP_ENCAP_JUNIPER_PPPOE },
286 * 168 is reserved for more Juniper private-chassis-
287 * internal meta-information.
290 { 169, WTAP_ENCAP_GPRS_LLC },
293 * 170 and 171 are reserved for ITU-T G.7041/Y.1303 Generic
297 /* Registered by Gcom, Inc. */
298 { 172, WTAP_GCOM_TIE1 },
299 { 173, WTAP_GCOM_SERIAL },
301 { 177, WTAP_ENCAP_LINUX_LAPD },
303 /* Ethernet frames prepended with meta-information */
304 { 178, WTAP_ENCAP_JUNIPER_ETHER },
305 /* PPP frames prepended with meta-information */
306 { 179, WTAP_ENCAP_JUNIPER_PPP },
307 /* Frame-Relay frames prepended with meta-information */
308 { 180, WTAP_ENCAP_JUNIPER_FRELAY },
309 /* C-HDLC frames prepended with meta-information */
310 { 181, WTAP_ENCAP_JUNIPER_CHDLC },
311 /* VOIP Frames prepended with meta-information */
312 { 183, WTAP_ENCAP_JUNIPER_VP },
313 /* raw USB packets */
314 { 186, WTAP_ENCAP_USB },
315 /* Bluetooth HCI UART transport (part H:4) frames, like hcidump */
316 { 187, WTAP_ENCAP_BLUETOOTH_H4 },
317 /* IEEE 802.16 MAC Common Part Sublayer */
318 { 188, WTAP_ENCAP_IEEE802_16_MAC_CPS },
319 /* USB packets with Linux-specified header */
320 { 189, WTAP_ENCAP_USB_LINUX },
322 { 190, WTAP_ENCAP_CAN20B },
323 /* Per-Packet Information header */
324 { 192, WTAP_ENCAP_PPI },
325 /* IEEE 802.15.4 Wireless PAN */
326 { 195, WTAP_ENCAP_IEEE802_15_4 },
327 /* SITA File Encapsulation */
328 { 196, WTAP_ENCAP_SITA },
329 /* Endace Record File Encapsulation */
330 { 197, WTAP_ENCAP_ERF },
332 { 199, WTAP_ENCAP_IPMB },
333 /* Bluetooth HCI UART transport (part H:4) frames, like hcidump */
334 { 201, WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR },
335 { 204, WTAP_ENCAP_PPP_WITH_PHDR },
337 { 209, WTAP_ENCAP_I2C },
339 { 210, WTAP_ENCAP_FLEXRAY },
341 { 211, WTAP_ENCAP_MOST },
343 { 212, WTAP_ENCAP_LIN },
344 /* X2E Xoraya serial frame */
345 { 213, WTAP_ENCAP_X2E_SERIAL },
346 /* X2E Xoraya frame */
347 { 214, WTAP_ENCAP_X2E_XORAYA },
348 /* IEEE 802.15.4 Wireless PAN non-ASK PHY */
349 { 215, WTAP_ENCAP_IEEE802_15_4_NONASK_PHY },
350 /* USB packets with padded Linux-specified header */
351 { 220, WTAP_ENCAP_USB_LINUX_MMAPPED },
352 /* Fibre Channel FC-2 frame */
353 { 224, WTAP_ENCAP_FIBRE_CHANNEL_FC2 },
358 * If you need a new encapsulation type for libpcap files, do
359 * *N*O*T* use *ANY* of the values listed here! I.e., do *NOT*
360 * add a new encapsulation type by changing an existing entry;
361 * leave the existing entries alone.
363 * Instead, send mail to tcpdump-workers@lists.tcpdump.org, asking
364 * for a new DLT_ value, and specifying the purpose of the new value.
365 * When you get the new DLT_ value, use that numerical value in
366 * the "dlt_value" field of "pcap_to_wtap_map[]".
370 * The following are entries for libpcap type values that have
371 * different meanings on different OSes.
373 * We put these *after* the entries for the platform-independent
374 * libpcap type values for those Wiretap encapsulation types, so
375 * that Wireshark chooses the platform-independent libpcap type
376 * value for those encapsulatioin types, not the platform-dependent
381 * 11 is DLT_ATM_RFC1483 on most platforms; the only libpcaps I've
382 * seen that define anything other than DLT_ATM_RFC1483 as 11 are
383 * the BSD/OS one, which defines DLT_FR as 11, and libpcap 0.5,
384 * which define it as 100, mapping the kernel's value to 100, in
385 * an attempt to hide the different values used on different
388 * If this is a platform where DLT_FR is defined as 11, we
389 * don't handle 11 at all; otherwise, we handle it as
390 * DLT_ATM_RFC1483 (this means we'd misinterpret Frame Relay
391 * captures from BSD/OS if running on platforms other than BSD/OS,
394 * 1) we don't yet support DLT_FR
398 * 2) nothing short of a heuristic would let us interpret
401 #if defined(DLT_FR) && (DLT_FR == 11)
402 { 11, WTAP_ENCAP_FRELAY },
404 { 11, WTAP_ENCAP_ATM_RFC1483 },
408 * 12 is DLT_RAW on most platforms, but it's DLT_C_HDLC on
409 * BSD/OS, and DLT_LOOP on OpenBSD.
411 * We don't yet handle DLT_C_HDLC, but we can handle DLT_LOOP
412 * (it's just like DLT_NULL, only with the AF_ value in network
413 * rather than host byte order - Wireshark figures out the
414 * byte order from the data, so we don't care what byte order
415 * it's in), so if DLT_LOOP is defined as 12, interpret 12
416 * as WTAP_ENCAP_NULL, otherwise, unless DLT_C_HDLC is defined
417 * as 12, interpret it as WTAP_ENCAP_RAW_IP.
419 #if defined(DLT_LOOP) && (DLT_LOOP == 12)
420 { 12, WTAP_ENCAP_NULL },
421 #elif defined(DLT_C_HDLC) && (DLT_C_HDLC == 12)
423 * Put entry for Cisco HDLC here.
424 * XXX - is this just WTAP_ENCAP_CHDLC, i.e. does the frame
425 * start with a 4-byte Cisco HDLC header?
428 { 12, WTAP_ENCAP_RAW_IP },
432 * 13 is DLT_SLIP_BSDOS on FreeBSD and NetBSD, but those OSes
433 * don't actually generate it. I infer that BSD/OS translates
434 * DLT_SLIP from the kernel BPF code to DLT_SLIP_BSDOS in
435 * libpcap, as the BSD/OS link-layer header is different;
436 * however, in BSD/OS, DLT_SLIP_BSDOS is 15.
438 * From this, I infer that there's no point in handling 13
441 * 13 is DLT_ATM_RFC1483 on BSD/OS.
443 * 13 is DLT_ENC in OpenBSD, which is, I suspect, some kind
444 * of decrypted IPSEC traffic.
446 #if defined(DLT_ATM_RFC1483) && (DLT_ATM_RFC1483 == 13)
447 { 13, WTAP_ENCAP_ATM_RFC1483 },
448 #elif defined(DLT_ENC) && (DLT_ENC == 13)
449 { 13, WTAP_ENCAP_ENC },
453 * 14 is DLT_PPP_BSDOS on FreeBSD and NetBSD, but those OSes
454 * don't actually generate it. I infer that BSD/OS translates
455 * DLT_PPP from the kernel BPF code to DLT_PPP_BSDOS in
456 * libpcap, as the BSD/OS link-layer header is different;
457 * however, in BSD/OS, DLT_PPP_BSDOS is 16.
459 * From this, I infer that there's no point in handling 14
462 * 14 is DLT_RAW on BSD/OS and OpenBSD.
464 { 14, WTAP_ENCAP_RAW_IP },
469 * DLT_SLIP_BSDOS on BSD/OS;
471 * DLT_HIPPI on NetBSD;
473 * DLT_LANE8023 with Alexey Kuznetzov's patches for
476 * DLT_I4L_RAWIP with the ISDN4Linux patches for libpcap
479 * but we don't currently handle any of those.
485 * DLT_PPP_BSDOS on BSD/OS;
487 * DLT_HDLC on NetBSD (Cisco HDLC);
489 * DLT_CIP with Alexey Kuznetzov's patches for
490 * Linux libpcap - this is WTAP_ENCAP_LINUX_ATM_CLIP;
492 * DLT_I4L_IP with the ISDN4Linux patches for libpcap
495 #if defined(DLT_CIP) && (DLT_CIP == 16)
496 { 16, WTAP_ENCAP_LINUX_ATM_CLIP },
498 #if defined(DLT_HDLC) && (DLT_HDLC == 16)
499 { 16, WTAP_ENCAP_CHDLC },
503 * 17 is DLT_LANE8023 in SuSE 6.3 libpcap; we don't currently
505 * It is also used as the PF (Packet Filter) logging format beginning
506 * with OpenBSD 3.0; we use 17 for PF logs unless DLT_LANE8023 is
507 * defined with the value 17.
509 #if !defined(DLT_LANE8023) || (DLT_LANE8023 != 17)
510 { 17, WTAP_ENCAP_OLD_PFLOG },
514 * 18 is DLT_CIP in SuSE 6.3 libpcap; if it's the same as the
515 * DLT_CIP of 16 that the Alexey Kuznetzov patches for
516 * libpcap/tcpdump define, it's WTAP_ENCAP_LINUX_ATM_CLIP.
517 * I've not found any libpcap that uses it for any other purpose -
518 * hopefully nobody will do so in the future.
520 { 18, WTAP_ENCAP_LINUX_ATM_CLIP },
523 * 19 is DLT_ATM_CLIP in the libpcap/tcpdump patches in the
524 * recent versions I've seen of the Linux ATM distribution;
525 * I've not yet found any libpcap that uses it for any other
526 * purpose - hopefully nobody will do so in the future.
528 { 19, WTAP_ENCAP_LINUX_ATM_CLIP },
533 * If you need a new encapsulation type for libpcap files, do
534 * *N*O*T* use *ANY* of the values listed here! I.e., do *NOT*
535 * add a new encapsulation type by changing an existing entry;
536 * leave the existing entries alone.
538 * Instead, send mail to tcpdump-workers@lists.tcpdump.org, asking
539 * for a new DLT_ value, and specifying the purpose of the new value.
540 * When you get the new DLT_ value, use that numerical value in
541 * the "dlt_value" field of "pcap_to_wtap_map[]".
544 #define NUM_PCAP_ENCAPS (sizeof pcap_to_wtap_map / sizeof pcap_to_wtap_map[0])
547 wtap_pcap_encap_to_wtap_encap(int encap)
551 for (i = 0; i < NUM_PCAP_ENCAPS; i++) {
552 if (pcap_to_wtap_map[i].dlt_value == encap)
553 return pcap_to_wtap_map[i].wtap_encap_value;
555 return WTAP_ENCAP_UNKNOWN;
559 wtap_wtap_encap_to_pcap_encap(int encap)
565 case WTAP_ENCAP_FDDI:
566 case WTAP_ENCAP_FDDI_BITSWAPPED:
567 case WTAP_ENCAP_NETTL_FDDI:
569 * Special-case WTAP_ENCAP_FDDI and
570 * WTAP_ENCAP_FDDI_BITSWAPPED; both of them get mapped
571 * to DLT_FDDI (even though that may mean that the bit
572 * order in the FDDI MAC addresses is wrong; so it goes
573 * - libpcap format doesn't record the byte order,
574 * so that's not fixable).
576 return 10; /* that's DLT_FDDI */
578 case WTAP_ENCAP_FRELAY_WITH_PHDR:
580 * Do the same with Frame Relay.
584 case WTAP_ENCAP_IEEE_802_11_WITH_RADIO:
586 * Map this to DLT_IEEE802_11, for now, even though
587 * that means the radio information will be lost.
588 * Once tcpdump support for the BSD radiotap header
589 * is sufficiently widespread, we should probably
590 * use that, instead - although we should probably
591 * ultimately just have WTAP_ENCAP_IEEE_802_11
592 * as the only Wiretap encapsulation for 802.11,
593 * and have the pseudo-header include a radiotap-style
594 * list of attributes. If we do that, though, we
595 * should probably bypass the regular Wiretap code
596 * when writing out packets during a capture, and just
597 * do the equivalent of a libpcap write (unfortunately,
598 * libpcap doesn't have an "open dump by file descriptor"
599 * function, so we can't just use "pcap_dump()"), so
600 * that we don't spend cycles mapping from libpcap to
601 * Wiretap and then back to libpcap. (There are other
602 * reasons to do that, e.g. to handle AIX libpcap better.)
607 for (i = 0; i < NUM_PCAP_ENCAPS; i++) {
608 if (pcap_to_wtap_map[i].wtap_encap_value == encap)
609 return pcap_to_wtap_map[i].dlt_value;
615 * Various pseudo-headers that appear at the beginning of packet data.
617 * We represent them as sets of offsets, as they might not be aligned on
618 * an appropriate structure boundary in the buffer, and as that makes them
619 * independent of the way the compiler might align fields.
623 * The link-layer header on SunATM packets.
625 #define SUNATM_FLAGS 0 /* destination and traffic type - 1 byte */
626 #define SUNATM_VPI 1 /* VPI - 1 byte */
627 #define SUNATM_VCI 2 /* VCI - 2 bytes */
628 #define SUNATM_LEN 4 /* length of the header */
631 * The link-layer header on Nokia IPSO ATM packets.
633 #define NOKIAATM_FLAGS 0 /* destination - 1 byte */
634 #define NOKIAATM_VPI 1 /* VPI - 1 byte */
635 #define NOKIAATM_VCI 2 /* VCI - 2 bytes */
636 #define NOKIAATM_LEN 4 /* length of the header */
639 * The fake link-layer header of IrDA packets as introduced by Jean Tourrilhes
642 #define IRDA_SLL_PKTTYPE_OFFSET 0 /* packet type - 2 bytes */
643 /* 12 unused bytes */
644 #define IRDA_SLL_PROTOCOL_OFFSET 14 /* protocol, should be ETH_P_LAPD - 2 bytes */
645 #define IRDA_SLL_LEN 16 /* length of the header */
648 * A header containing additional MTP information.
650 #define MTP2_SENT_OFFSET 0 /* 1 byte */
651 #define MTP2_ANNEX_A_USED_OFFSET 1 /* 1 byte */
652 #define MTP2_LINK_NUMBER_OFFSET 2 /* 2 bytes */
653 #define MTP2_HDR_LEN 4 /* length of the header */
656 * A header containing additional SITA WAN information.
658 #define SITA_FLAGS_OFFSET 0 /* 1 byte */
659 #define SITA_SIGNALS_OFFSET 1 /* 1 byte */
660 #define SITA_ERRORS1_OFFSET 2 /* 1 byte */
661 #define SITA_ERRORS2_OFFSET 3 /* 1 byte */
662 #define SITA_PROTO_OFFSET 4 /* 1 byte */
663 #define SITA_HDR_LEN 5 /* length of the header */
666 * The fake link-layer header of LAPD packets.
669 #define ETH_P_LAPD 0x0030
672 #define LAPD_SLL_PKTTYPE_OFFSET 0 /* packet type - 2 bytes */
673 #define LAPD_SLL_HATYPE_OFFSET 2 /* hardware address type - 2 bytes */
674 #define LAPD_SLL_HALEN_OFFSET 4 /* hardware address length - 2 bytes */
675 #define LAPD_SLL_ADDR_OFFSET 6 /* address - 8 bytes */
676 #define LAPD_SLL_PROTOCOL_OFFSET 14 /* protocol, should be ETH_P_LAPD - 2 bytes */
677 #define LAPD_SLL_LEN 16 /* length of the header */
680 * I2C link-layer on-disk format
682 struct i2c_file_hdr {
688 pcap_read_sunatm_pseudoheader(FILE_T fh,
689 union wtap_pseudo_header *pseudo_header, int *err)
691 guint8 atm_phdr[SUNATM_LEN];
696 errno = WTAP_ERR_CANT_READ;
697 bytes_read = file_read(atm_phdr, 1, SUNATM_LEN, fh);
698 if (bytes_read != SUNATM_LEN) {
699 *err = file_error(fh);
701 *err = WTAP_ERR_SHORT_READ;
705 vpi = atm_phdr[SUNATM_VPI];
706 vci = pntohs(&atm_phdr[SUNATM_VCI]);
708 switch (atm_phdr[SUNATM_FLAGS] & 0x0F) {
710 case 0x01: /* LANE */
711 pseudo_header->atm.aal = AAL_5;
712 pseudo_header->atm.type = TRAF_LANE;
715 case 0x02: /* RFC 1483 LLC multiplexed traffic */
716 pseudo_header->atm.aal = AAL_5;
717 pseudo_header->atm.type = TRAF_LLCMX;
720 case 0x05: /* ILMI */
721 pseudo_header->atm.aal = AAL_5;
722 pseudo_header->atm.type = TRAF_ILMI;
725 case 0x06: /* Q.2931 */
726 pseudo_header->atm.aal = AAL_SIGNALLING;
727 pseudo_header->atm.type = TRAF_UNKNOWN;
730 case 0x03: /* MARS (RFC 2022) */
731 pseudo_header->atm.aal = AAL_5;
732 pseudo_header->atm.type = TRAF_UNKNOWN;
735 case 0x04: /* IFMP (Ipsilon Flow Management Protocol; see RFC 1954) */
736 pseudo_header->atm.aal = AAL_5;
737 pseudo_header->atm.type = TRAF_UNKNOWN; /* XXX - TRAF_IPSILON? */
742 * Assume it's AAL5, unless it's VPI 0 and VCI 5, in which
743 * case assume it's AAL_SIGNALLING; we know nothing more
746 * XXX - is this necessary? Or are we guaranteed that
747 * all signalling traffic has a type of 0x06?
749 * XXX - is this guaranteed to be AAL5? Or, if the type is
750 * 0x00 ("raw"), might it be non-AAL5 traffic?
752 if (vpi == 0 && vci == 5)
753 pseudo_header->atm.aal = AAL_SIGNALLING;
755 pseudo_header->atm.aal = AAL_5;
756 pseudo_header->atm.type = TRAF_UNKNOWN;
759 pseudo_header->atm.subtype = TRAF_ST_UNKNOWN;
761 pseudo_header->atm.vpi = vpi;
762 pseudo_header->atm.vci = vci;
763 pseudo_header->atm.channel = (atm_phdr[SUNATM_FLAGS] & 0x80) ? 0 : 1;
765 /* We don't have this information */
766 pseudo_header->atm.flags = 0;
767 pseudo_header->atm.cells = 0;
768 pseudo_header->atm.aal5t_u2u = 0;
769 pseudo_header->atm.aal5t_len = 0;
770 pseudo_header->atm.aal5t_chksum = 0;
776 pcap_read_nokiaatm_pseudoheader(FILE_T fh,
777 union wtap_pseudo_header *pseudo_header, int *err)
779 guint8 atm_phdr[NOKIAATM_LEN];
784 errno = WTAP_ERR_CANT_READ;
785 bytes_read = file_read(atm_phdr, 1, NOKIAATM_LEN, fh);
786 if (bytes_read != NOKIAATM_LEN) {
787 *err = file_error(fh);
789 *err = WTAP_ERR_SHORT_READ;
793 vpi = atm_phdr[NOKIAATM_VPI];
794 vci = pntohs(&atm_phdr[NOKIAATM_VCI]);
796 pseudo_header->atm.vpi = vpi;
797 pseudo_header->atm.vci = vci;
798 pseudo_header->atm.channel = (atm_phdr[NOKIAATM_FLAGS] & 0x80) ? 0 : 1;
800 /* We don't have this information */
801 pseudo_header->atm.flags = 0;
802 pseudo_header->atm.cells = 0;
803 pseudo_header->atm.aal5t_u2u = 0;
804 pseudo_header->atm.aal5t_len = 0;
805 pseudo_header->atm.aal5t_chksum = 0;
811 pcap_read_irda_pseudoheader(FILE_T fh, union wtap_pseudo_header *pseudo_header,
812 int *err, gchar **err_info)
814 guint8 irda_phdr[IRDA_SLL_LEN];
817 errno = WTAP_ERR_CANT_READ;
818 bytes_read = file_read(irda_phdr, 1, IRDA_SLL_LEN, fh);
819 if (bytes_read != IRDA_SLL_LEN) {
820 *err = file_error(fh);
822 *err = WTAP_ERR_SHORT_READ;
826 if (pntohs(&irda_phdr[IRDA_SLL_PROTOCOL_OFFSET]) != 0x0017) {
827 *err = WTAP_ERR_BAD_RECORD;
828 if (err_info != NULL)
829 *err_info = g_strdup("libpcap: IrDA capture has a packet with an invalid sll_protocol field");
833 pseudo_header->irda.pkttype = pntohs(&irda_phdr[IRDA_SLL_PKTTYPE_OFFSET]);
839 pcap_read_mtp2_pseudoheader(FILE_T fh, union wtap_pseudo_header *pseudo_header, int *err, gchar **err_info _U_)
841 guint8 mtp2_hdr[MTP2_HDR_LEN];
844 errno = WTAP_ERR_CANT_READ;
845 bytes_read = file_read(mtp2_hdr, 1, MTP2_HDR_LEN, fh);
846 if (bytes_read != MTP2_HDR_LEN) {
847 *err = file_error(fh);
849 *err = WTAP_ERR_SHORT_READ;
853 pseudo_header->mtp2.sent = mtp2_hdr[MTP2_SENT_OFFSET];
854 pseudo_header->mtp2.annex_a_used = mtp2_hdr[MTP2_ANNEX_A_USED_OFFSET];
855 pseudo_header->mtp2.link_number = pntohs(&mtp2_hdr[MTP2_LINK_NUMBER_OFFSET]);
861 pcap_read_lapd_pseudoheader(FILE_T fh, union wtap_pseudo_header *pseudo_header,
862 int *err, gchar **err_info)
864 guint8 lapd_phdr[LAPD_SLL_LEN];
867 errno = WTAP_ERR_CANT_READ;
868 bytes_read = file_read(lapd_phdr, 1, LAPD_SLL_LEN, fh);
869 if (bytes_read != LAPD_SLL_LEN) {
870 *err = file_error(fh);
872 *err = WTAP_ERR_SHORT_READ;
876 if (pntohs(&lapd_phdr[LAPD_SLL_PROTOCOL_OFFSET]) != ETH_P_LAPD) {
877 *err = WTAP_ERR_BAD_RECORD;
878 if (err_info != NULL)
879 *err_info = g_strdup("libpcap: LAPD capture has a packet with an invalid sll_protocol field");
883 pseudo_header->lapd.pkttype = pntohs(&lapd_phdr[LAPD_SLL_PKTTYPE_OFFSET]);
884 pseudo_header->lapd.we_network = !!lapd_phdr[LAPD_SLL_ADDR_OFFSET+0];
890 pcap_read_sita_pseudoheader(FILE_T fh, union wtap_pseudo_header *pseudo_header, int *err, gchar **err_info _U_)
892 guint8 sita_phdr[SITA_HDR_LEN];
895 errno = WTAP_ERR_CANT_READ;
896 bytes_read = file_read(sita_phdr, 1, SITA_HDR_LEN, fh);
897 if (bytes_read != SITA_HDR_LEN) {
898 *err = file_error(fh);
900 *err = WTAP_ERR_SHORT_READ;
904 pseudo_header->sita.flags = sita_phdr[SITA_FLAGS_OFFSET];
905 pseudo_header->sita.signals = sita_phdr[SITA_SIGNALS_OFFSET];
906 pseudo_header->sita.errors1 = sita_phdr[SITA_ERRORS1_OFFSET];
907 pseudo_header->sita.errors2 = sita_phdr[SITA_ERRORS2_OFFSET];
908 pseudo_header->sita.proto = sita_phdr[SITA_PROTO_OFFSET];
914 pcap_read_linux_usb_pseudoheader(FILE_T fh,
915 union wtap_pseudo_header *pseudo_header, gboolean byte_swapped, int *err)
919 errno = WTAP_ERR_CANT_READ;
920 bytes_read = file_read(&pseudo_header->linux_usb, 1,
921 sizeof (struct linux_usb_phdr), fh);
922 if (bytes_read != sizeof (struct linux_usb_phdr)) {
923 *err = file_error(fh);
925 *err = WTAP_ERR_SHORT_READ;
930 pseudo_header->linux_usb.id = GUINT64_SWAP_LE_BE(pseudo_header->linux_usb.id);
931 pseudo_header->linux_usb.bus_id = GUINT16_SWAP_LE_BE(pseudo_header->linux_usb.bus_id);
932 pseudo_header->linux_usb.ts_sec = GUINT64_SWAP_LE_BE(pseudo_header->linux_usb.ts_sec);
933 pseudo_header->linux_usb.ts_usec = GUINT32_SWAP_LE_BE(pseudo_header->linux_usb.ts_usec);
934 pseudo_header->linux_usb.status = GUINT32_SWAP_LE_BE(pseudo_header->linux_usb.status);
935 pseudo_header->linux_usb.urb_len = GUINT32_SWAP_LE_BE(pseudo_header->linux_usb.urb_len);
936 pseudo_header->linux_usb.data_len = GUINT32_SWAP_LE_BE(pseudo_header->linux_usb.data_len);
943 pcap_read_bt_pseudoheader(FILE_T fh,
944 union wtap_pseudo_header *pseudo_header, int *err)
947 struct libpcap_bt_phdr phdr;
949 errno = WTAP_ERR_CANT_READ;
950 bytes_read = file_read(&phdr, 1,
951 sizeof (struct libpcap_bt_phdr), fh);
952 if (bytes_read != sizeof (struct libpcap_bt_phdr)) {
953 *err = file_error(fh);
955 *err = WTAP_ERR_SHORT_READ;
958 pseudo_header->p2p.sent = ((g_ntohl(phdr.direction) & LIBPCAP_BT_PHDR_RECV) == 0)? TRUE: FALSE;
963 pcap_read_ppp_pseudoheader(FILE_T fh,
964 union wtap_pseudo_header *pseudo_header, int *err)
967 struct libpcap_ppp_phdr phdr;
969 errno = WTAP_ERR_CANT_READ;
970 bytes_read = file_read(&phdr, 1,
971 sizeof (struct libpcap_ppp_phdr), fh);
972 if (bytes_read != sizeof (struct libpcap_ppp_phdr)) {
973 *err = file_error(fh);
975 *err = WTAP_ERR_SHORT_READ;
978 pseudo_header->p2p.sent = (phdr.direction == LIBPCAP_PPP_PHDR_SENT) ? TRUE: FALSE;
983 pcap_read_erf_pseudoheader(FILE_T fh, struct wtap_pkthdr *whdr,
984 union wtap_pseudo_header *pseudo_header, int *err, gchar **err_info _U_)
986 guint8 erf_hdr[sizeof(struct erf_phdr)];
989 errno = WTAP_ERR_CANT_READ;
990 bytes_read = file_read(erf_hdr, 1, sizeof(struct erf_phdr), fh);
991 if (bytes_read != sizeof(struct erf_phdr)) {
992 *err = file_error(fh);
994 *err = WTAP_ERR_SHORT_READ;
997 pseudo_header->erf.phdr.ts = pletohll(&erf_hdr[0]); /* timestamp */
998 pseudo_header->erf.phdr.type = erf_hdr[8];
999 pseudo_header->erf.phdr.flags = erf_hdr[9];
1000 pseudo_header->erf.phdr.rlen = pntohs(&erf_hdr[10]);
1001 pseudo_header->erf.phdr.lctr = pntohs(&erf_hdr[12]);
1002 pseudo_header->erf.phdr.wlen = pntohs(&erf_hdr[14]);
1004 /* The high 32 bits of the timestamp contain the integer number of seconds
1005 * while the lower 32 bits contain the binary fraction of the second.
1006 * This allows an ultimate resolution of 1/(2^32) seconds, or approximately 233 picoseconds */
1008 guint64 ts = pseudo_header->erf.phdr.ts;
1009 whdr->ts.secs = (guint32) (ts >> 32);
1010 ts = ((ts & 0xffffffff) * 1000 * 1000 * 1000);
1011 ts += (ts & 0x80000000) << 1; /* rounding */
1012 whdr->ts.nsecs = ((guint32) (ts >> 32));
1013 if ( whdr->ts.nsecs >= 1000000000) {
1014 whdr->ts.nsecs -= 1000000000;
1022 * If the type of record given in the pseudo header indicate the presence of an extension
1023 * header then, read all the extension headers
1026 pcap_read_erf_exheader(FILE_T fh, union wtap_pseudo_header *pseudo_header,
1027 int *err, gchar **err_info _U_, guint * psize)
1030 guint8 erf_exhdr[8];
1031 guint64 erf_exhdr_sw;
1032 int i = 0, max = sizeof(pseudo_header->erf.ehdr_list)/sizeof(struct erf_ehdr);
1033 guint8 type = pseudo_header->erf.phdr.type;
1035 if (pseudo_header->erf.phdr.type & 0x80){
1037 errno = WTAP_ERR_CANT_READ;
1038 bytes_read = file_read(erf_exhdr, 1, 8, fh);
1039 if (bytes_read != 8 ) {
1040 *err = file_error(fh);
1042 *err = WTAP_ERR_SHORT_READ;
1045 type = erf_exhdr[0];
1046 erf_exhdr_sw = pntohll((guint64*) &(erf_exhdr[0]));
1048 memcpy(&pseudo_header->erf.ehdr_list[i].ehdr, &erf_exhdr_sw, sizeof(erf_exhdr_sw));
1051 } while (type & 0x80);
1057 * If the type of record given in the pseudo header indicate the precense of a subheader
1058 * then, read this optional subheader
1061 pcap_read_erf_subheader(FILE_T fh, union wtap_pseudo_header *pseudo_header,
1062 int *err, gchar **err_info _U_, guint * psize)
1064 guint8 erf_subhdr[sizeof(union erf_subhdr)];
1068 switch(pseudo_header->erf.phdr.type & 0x7F) {
1069 case ERF_TYPE_MC_HDLC:
1070 case ERF_TYPE_MC_RAW:
1071 case ERF_TYPE_MC_ATM:
1072 case ERF_TYPE_MC_RAW_CHANNEL:
1073 case ERF_TYPE_MC_AAL5:
1074 case ERF_TYPE_MC_AAL2:
1075 case ERF_TYPE_COLOR_MC_HDLC_POS:
1076 /* Extract the Multi Channel header to include it in the pseudo header part */
1077 errno = WTAP_ERR_CANT_READ;
1078 bytes_read = file_read(erf_subhdr, 1, sizeof(erf_mc_header_t), fh);
1079 if (bytes_read != sizeof(erf_mc_header_t) ) {
1080 *err = file_error(fh);
1082 *err = WTAP_ERR_SHORT_READ;
1085 pseudo_header->erf.subhdr.mc_hdr = pntohl(&erf_subhdr[0]);
1086 *psize = sizeof(erf_mc_header_t);
1089 case ERF_TYPE_COLOR_ETH:
1090 case ERF_TYPE_DSM_COLOR_ETH:
1091 /* Extract the Ethernet additional header to include it in the pseudo header part */
1092 errno = WTAP_ERR_CANT_READ;
1093 bytes_read = file_read(erf_subhdr, 1, sizeof(erf_eth_header_t), fh);
1094 if (bytes_read != sizeof(erf_eth_header_t) ) {
1095 *err = file_error(fh);
1097 *err = WTAP_ERR_SHORT_READ;
1100 pseudo_header->erf.subhdr.eth_hdr = pntohs(&erf_subhdr[0]);
1101 *psize = sizeof(erf_eth_header_t);
1104 /* No optional pseudo header for this ERF type */
1111 pcap_read_i2c_pseudoheader(FILE_T fh, union wtap_pseudo_header *pseudo_header, int *err, gchar **err_info _U_)
1113 struct i2c_file_hdr i2c_hdr;
1116 errno = WTAP_ERR_CANT_READ;
1117 bytes_read = file_read(&i2c_hdr, 1, sizeof (i2c_hdr), fh);
1118 if (bytes_read != sizeof (i2c_hdr)) {
1119 *err = file_error(fh);
1121 *err = WTAP_ERR_SHORT_READ;
1125 pseudo_header->i2c.is_event = i2c_hdr.bus & 0x80 ? 1 : 0;
1126 pseudo_header->i2c.bus = i2c_hdr.bus & 0x7f;
1127 pseudo_header->i2c.flags = pntohl(&i2c_hdr.flags);
1133 pcap_process_pseudo_header(FILE_T fh, int file_type, int wtap_encap, gboolean bytes_swapped, guint packet_size,
1134 gboolean check_packet_size, struct wtap_pkthdr *phdr,
1135 union wtap_pseudo_header *pseudo_header, int *err, gchar **err_info)
1140 switch (wtap_encap) {
1142 case WTAP_ENCAP_ATM_PDUS:
1143 if (file_type == WTAP_FILE_PCAP_NOKIA) {
1147 if (check_packet_size && packet_size < NOKIAATM_LEN) {
1149 * Uh-oh, the packet isn't big enough to even
1150 * have a pseudo-header.
1152 *err = WTAP_ERR_BAD_RECORD;
1153 *err_info = g_strdup_printf("pcap: Nokia IPSO ATM file has a %u-byte packet, too small to have even an ATM pseudo-header",
1157 if (!pcap_read_nokiaatm_pseudoheader(fh,
1158 pseudo_header, err))
1159 return -1; /* Read error */
1161 phdr_len = NOKIAATM_LEN;
1166 if (check_packet_size && packet_size < SUNATM_LEN) {
1168 * Uh-oh, the packet isn't big enough to even
1169 * have a pseudo-header.
1171 *err = WTAP_ERR_BAD_RECORD;
1172 *err_info = g_strdup_printf("pcap: SunATM file has a %u-byte packet, too small to have even an ATM pseudo-header",
1176 if (!pcap_read_sunatm_pseudoheader(fh,
1177 pseudo_header, err))
1178 return -1; /* Read error */
1180 phdr_len = SUNATM_LEN;
1184 case WTAP_ENCAP_ETHERNET:
1186 * We don't know whether there's an FCS in this frame or not.
1188 pseudo_header->eth.fcs_len = -1;
1191 case WTAP_ENCAP_IEEE_802_11:
1192 case WTAP_ENCAP_PRISM_HEADER:
1193 case WTAP_ENCAP_IEEE_802_11_WLAN_RADIOTAP:
1194 case WTAP_ENCAP_IEEE_802_11_WLAN_AVS:
1196 * We don't know whether there's an FCS in this frame or not.
1197 * XXX - are there any OSes where the capture mechanism
1200 pseudo_header->ieee_802_11.fcs_len = -1;
1201 pseudo_header->ieee_802_11.channel = 0;
1202 pseudo_header->ieee_802_11.data_rate = 0;
1203 pseudo_header->ieee_802_11.signal_level = 0;
1206 case WTAP_ENCAP_IRDA:
1207 if (check_packet_size && packet_size < IRDA_SLL_LEN) {
1209 * Uh-oh, the packet isn't big enough to even
1210 * have a pseudo-header.
1212 *err = WTAP_ERR_BAD_RECORD;
1213 *err_info = g_strdup_printf("pcap: IrDA file has a %u-byte packet, too small to have even an IrDA pseudo-header",
1217 if (!pcap_read_irda_pseudoheader(fh, pseudo_header,
1219 return -1; /* Read error */
1221 phdr_len = IRDA_SLL_LEN;
1224 case WTAP_ENCAP_MTP2_WITH_PHDR:
1225 if (check_packet_size && packet_size < MTP2_HDR_LEN) {
1227 * Uh-oh, the packet isn't big enough to even
1228 * have a pseudo-header.
1230 *err = WTAP_ERR_BAD_RECORD;
1231 *err_info = g_strdup_printf("pcap: MTP2 file has a %u-byte packet, too small to have even an MTP2 pseudo-header",
1235 if (!pcap_read_mtp2_pseudoheader(fh, pseudo_header,
1237 return -1; /* Read error */
1239 phdr_len = MTP2_HDR_LEN;
1242 case WTAP_ENCAP_LINUX_LAPD:
1243 if (check_packet_size && packet_size < LAPD_SLL_LEN) {
1245 * Uh-oh, the packet isn't big enough to even
1246 * have a pseudo-header.
1248 *err = WTAP_ERR_BAD_RECORD;
1249 *err_info = g_strdup_printf("pcap: LAPD file has a %u-byte packet, too small to have even a LAPD pseudo-header",
1253 if (!pcap_read_lapd_pseudoheader(fh, pseudo_header,
1255 return -1; /* Read error */
1257 phdr_len = LAPD_SLL_LEN;
1260 case WTAP_ENCAP_SITA:
1261 if (check_packet_size && packet_size < SITA_HDR_LEN) {
1263 * Uh-oh, the packet isn't big enough to even
1264 * have a pseudo-header.
1266 *err = WTAP_ERR_BAD_RECORD;
1267 *err_info = g_strdup_printf("pcap: SITA file has a %u-byte packet, too small to have even a SITA pseudo-header",
1271 if (!pcap_read_sita_pseudoheader(fh, pseudo_header,
1273 return -1; /* Read error */
1275 phdr_len = SITA_HDR_LEN;
1278 case WTAP_ENCAP_USB_LINUX:
1279 case WTAP_ENCAP_USB_LINUX_MMAPPED:
1280 if (check_packet_size &&
1281 packet_size < sizeof (struct linux_usb_phdr)) {
1283 * Uh-oh, the packet isn't big enough to even
1284 * have a pseudo-header.
1286 *err = WTAP_ERR_BAD_RECORD;
1287 *err_info = g_strdup_printf("pcap: Linux USB file has a %u-byte packet, too small to have even a Linux USB pseudo-header",
1291 if (!pcap_read_linux_usb_pseudoheader(fh,
1292 pseudo_header, bytes_swapped, err))
1293 return -1; /* Read error */
1295 phdr_len = (int)sizeof (struct linux_usb_phdr);
1298 case WTAP_ENCAP_BLUETOOTH_H4:
1299 /* We don't have pseudoheader, so just pretend we received everything. */
1300 pseudo_header->p2p.sent = FALSE;
1303 case WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR:
1304 if (check_packet_size &&
1305 packet_size < sizeof (struct libpcap_bt_phdr)) {
1307 * Uh-oh, the packet isn't big enough to even
1308 * have a pseudo-header.
1310 *err = WTAP_ERR_BAD_RECORD;
1311 *err_info = g_strdup_printf("pcap: lipcap bluetooth file has a %u-byte packet, too small to have even a pseudo-header",
1315 if (!pcap_read_bt_pseudoheader(fh,
1316 pseudo_header, err))
1317 return -1; /* Read error */
1319 phdr_len = (int)sizeof (struct libpcap_bt_phdr);
1322 case WTAP_ENCAP_PPP_WITH_PHDR:
1323 if (check_packet_size &&
1324 packet_size < sizeof (struct libpcap_ppp_phdr)) {
1326 * Uh-oh, the packet isn't big enough to even
1327 * have a pseudo-header.
1329 *err = WTAP_ERR_BAD_RECORD;
1330 *err_info = g_strdup_printf("pcap: lipcap ppp file has a %u-byte packet, too small to have even a pseudo-header",
1334 if (!pcap_read_ppp_pseudoheader(fh,
1335 pseudo_header, err))
1336 return -1; /* Read error */
1338 phdr_len = (int)sizeof (struct libpcap_ppp_phdr);
1341 case WTAP_ENCAP_ERF:
1342 if (check_packet_size &&
1343 packet_size < sizeof(struct erf_phdr) ) {
1345 * Uh-oh, the packet isn't big enough to even
1346 * have a pseudo-header.
1348 *err = WTAP_ERR_BAD_RECORD;
1349 *err_info = g_strdup_printf("pcap: ERF file has a %u-byte packet, too small to have even an ERF pseudo-header",
1354 if (!pcap_read_erf_pseudoheader(fh, phdr, pseudo_header,
1356 return -1; /* Read error */
1358 phdr_len = (int)sizeof(struct erf_phdr);
1360 /* check the optional Extension header */
1361 if (!pcap_read_erf_exheader(fh, pseudo_header, err, err_info,
1363 return -1; /* Read error */
1367 /* check the optional Multi Channel header */
1368 if (!pcap_read_erf_subheader(fh, pseudo_header, err, err_info,
1370 return -1; /* Read error */
1375 case WTAP_ENCAP_I2C:
1376 if (check_packet_size &&
1377 packet_size < sizeof (struct i2c_file_hdr)) {
1379 * Uh-oh, the packet isn't big enough to even
1380 * have a pseudo-header.
1382 *err = WTAP_ERR_BAD_RECORD;
1383 *err_info = g_strdup_printf("pcap: I2C file has a %u-byte packet, too small to have even a I2C pseudo-header",
1387 if (!pcap_read_i2c_pseudoheader(fh, pseudo_header,
1389 return -1; /* Read error */
1392 * Don't count the pseudo-header as part of the packet.
1394 phdr_len = (int)sizeof (struct i2c_file_hdr);
1402 pcap_get_phdr_size(int encap, const union wtap_pseudo_header *pseudo_header)
1408 case WTAP_ENCAP_ATM_PDUS:
1409 hdrsize = SUNATM_LEN;
1412 case WTAP_ENCAP_IRDA:
1413 hdrsize = IRDA_SLL_LEN;
1416 case WTAP_ENCAP_MTP2_WITH_PHDR:
1417 hdrsize = MTP2_HDR_LEN;
1420 case WTAP_ENCAP_LINUX_LAPD:
1421 hdrsize = LAPD_SLL_LEN;
1424 case WTAP_ENCAP_SITA:
1425 hdrsize = SITA_HDR_LEN;
1428 case WTAP_ENCAP_USB_LINUX:
1429 case WTAP_ENCAP_USB_LINUX_MMAPPED:
1430 hdrsize = (int)sizeof (struct linux_usb_phdr);
1433 case WTAP_ENCAP_ERF:
1434 hdrsize = (int)sizeof (struct erf_phdr);
1435 if (pseudo_header->erf.phdr.type & 0x80)
1437 switch (pseudo_header->erf.phdr.type & 0x7F) {
1439 case ERF_TYPE_MC_HDLC:
1440 case ERF_TYPE_MC_RAW:
1441 case ERF_TYPE_MC_ATM:
1442 case ERF_TYPE_MC_RAW_CHANNEL:
1443 case ERF_TYPE_MC_AAL5:
1444 case ERF_TYPE_MC_AAL2:
1445 case ERF_TYPE_COLOR_MC_HDLC_POS:
1446 hdrsize += (int)sizeof(struct erf_mc_hdr);
1450 case ERF_TYPE_COLOR_ETH:
1451 case ERF_TYPE_DSM_COLOR_ETH:
1452 hdrsize += (int)sizeof(struct erf_eth_hdr);
1460 case WTAP_ENCAP_I2C:
1461 hdrsize = (int)sizeof (struct i2c_file_hdr);
1464 case WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR:
1465 hdrsize = (int)sizeof (struct libpcap_bt_phdr);
1468 case WTAP_ENCAP_PPP_WITH_PHDR:
1469 hdrsize = (int)sizeof (struct libpcap_ppp_phdr);
1481 pcap_write_phdr(wtap_dumper *wdh, int encap, const union wtap_pseudo_header *pseudo_header,
1484 guint8 atm_hdr[SUNATM_LEN];
1485 guint8 irda_hdr[IRDA_SLL_LEN];
1486 guint8 lapd_hdr[LAPD_SLL_LEN];
1487 guint8 mtp2_hdr[MTP2_HDR_LEN];
1488 guint8 sita_hdr[SITA_HDR_LEN];
1489 guint8 erf_hdr[ sizeof(struct erf_mc_phdr)];
1490 struct i2c_file_hdr i2c_hdr;
1491 struct libpcap_bt_phdr bt_hdr;
1492 struct libpcap_ppp_phdr ppp_hdr;
1498 case WTAP_ENCAP_ATM_PDUS:
1500 * Write the ATM header.
1502 atm_hdr[SUNATM_FLAGS] =
1503 (pseudo_header->atm.channel == 0) ? 0x80 : 0x00;
1504 switch (pseudo_header->atm.aal) {
1506 case AAL_SIGNALLING:
1508 atm_hdr[SUNATM_FLAGS] |= 0x06;
1512 switch (pseudo_header->atm.type) {
1516 atm_hdr[SUNATM_FLAGS] |= 0x01;
1520 /* RFC 1483 LLC multiplexed traffic */
1521 atm_hdr[SUNATM_FLAGS] |= 0x02;
1526 atm_hdr[SUNATM_FLAGS] |= 0x05;
1531 atm_hdr[SUNATM_VPI] = (guint8)pseudo_header->atm.vpi;
1532 phtons(&atm_hdr[SUNATM_VCI], pseudo_header->atm.vci);
1533 nwritten = wtap_dump_file_write(wdh, atm_hdr, sizeof(atm_hdr));
1534 if (nwritten != sizeof(atm_hdr)) {
1535 if (nwritten == 0 && wtap_dump_file_ferror(wdh))
1536 *err = wtap_dump_file_ferror(wdh);
1538 *err = WTAP_ERR_SHORT_WRITE;
1541 wdh->bytes_dumped += sizeof(atm_hdr);
1544 case WTAP_ENCAP_IRDA:
1546 * Write the IrDA header.
1548 memset(irda_hdr, 0, sizeof(irda_hdr));
1549 phtons(&irda_hdr[IRDA_SLL_PKTTYPE_OFFSET],
1550 pseudo_header->irda.pkttype);
1551 phtons(&irda_hdr[IRDA_SLL_PROTOCOL_OFFSET], 0x0017);
1552 nwritten = wtap_dump_file_write(wdh, irda_hdr, sizeof(irda_hdr));
1553 if (nwritten != sizeof(irda_hdr)) {
1554 if (nwritten == 0 && wtap_dump_file_ferror(wdh))
1555 *err = wtap_dump_file_ferror(wdh);
1557 *err = WTAP_ERR_SHORT_WRITE;
1560 wdh->bytes_dumped += sizeof(irda_hdr);
1563 case WTAP_ENCAP_MTP2_WITH_PHDR:
1565 * Write the MTP2 header.
1567 memset(&mtp2_hdr, 0, sizeof(mtp2_hdr));
1568 mtp2_hdr[MTP2_SENT_OFFSET] = pseudo_header->mtp2.sent;
1569 mtp2_hdr[MTP2_ANNEX_A_USED_OFFSET] = pseudo_header->mtp2.annex_a_used;
1570 phtons(&mtp2_hdr[MTP2_LINK_NUMBER_OFFSET],
1571 pseudo_header->mtp2.link_number);
1572 nwritten = wtap_dump_file_write(wdh, mtp2_hdr, sizeof(mtp2_hdr));
1573 if (nwritten != sizeof(mtp2_hdr)) {
1574 if (nwritten == 0 && wtap_dump_file_ferror(wdh))
1575 *err = wtap_dump_file_ferror(wdh);
1577 *err = WTAP_ERR_SHORT_WRITE;
1580 wdh->bytes_dumped += sizeof(mtp2_hdr);
1583 case WTAP_ENCAP_LINUX_LAPD:
1585 * Write the LAPD header.
1587 memset(&lapd_hdr, 0, sizeof(lapd_hdr));
1588 phtons(&lapd_hdr[LAPD_SLL_PKTTYPE_OFFSET],
1589 pseudo_header->lapd.pkttype);
1590 phtons(&lapd_hdr[LAPD_SLL_PROTOCOL_OFFSET], ETH_P_LAPD);
1591 lapd_hdr[LAPD_SLL_ADDR_OFFSET + 0] =
1592 pseudo_header->lapd.we_network?0x01:0x00;
1593 nwritten = fwrite(&lapd_hdr, 1, sizeof(lapd_hdr), wdh->fh);
1594 if (nwritten != sizeof(lapd_hdr)) {
1595 if (nwritten == 0 && ferror(wdh->fh))
1598 *err = WTAP_ERR_SHORT_WRITE;
1601 wdh->bytes_dumped += sizeof(lapd_hdr);
1604 case WTAP_ENCAP_SITA:
1606 * Write the SITA header.
1608 memset(&sita_hdr, 0, sizeof(sita_hdr));
1609 sita_hdr[SITA_FLAGS_OFFSET] = pseudo_header->sita.flags;
1610 sita_hdr[SITA_SIGNALS_OFFSET] = pseudo_header->sita.signals;
1611 sita_hdr[SITA_ERRORS1_OFFSET] = pseudo_header->sita.errors1;
1612 sita_hdr[SITA_ERRORS2_OFFSET] = pseudo_header->sita.errors2;
1613 sita_hdr[SITA_PROTO_OFFSET] = pseudo_header->sita.proto;
1614 nwritten = fwrite(&sita_hdr, 1, sizeof(sita_hdr), wdh->fh);
1615 if (nwritten != sizeof(sita_hdr)) {
1616 if (nwritten == 0 && ferror(wdh->fh))
1619 *err = WTAP_ERR_SHORT_WRITE;
1622 wdh->bytes_dumped += sizeof(sita_hdr);
1625 case WTAP_ENCAP_USB_LINUX:
1626 case WTAP_ENCAP_USB_LINUX_MMAPPED:
1628 * Write out the pseudo-header; it has the same format
1629 * as the Linux USB header, and that header is supposed
1630 * to be written in the host byte order of the machine
1633 nwritten = fwrite(&pseudo_header->linux_usb, 1,
1634 sizeof(pseudo_header->linux_usb), wdh->fh);
1635 if (nwritten != sizeof(pseudo_header->linux_usb)) {
1636 if (nwritten == 0 && ferror(wdh->fh))
1639 *err = WTAP_ERR_SHORT_WRITE;
1642 wdh->bytes_dumped += sizeof(lapd_hdr);
1645 case WTAP_ENCAP_ERF:
1647 * Write the ERF header.
1649 memset(&erf_hdr, 0, sizeof(erf_hdr));
1650 pletonll(&erf_hdr[0], pseudo_header->erf.phdr.ts);
1651 erf_hdr[8] = pseudo_header->erf.phdr.type;
1652 erf_hdr[9] = pseudo_header->erf.phdr.flags;
1653 phtons(&erf_hdr[10], pseudo_header->erf.phdr.rlen);
1654 phtons(&erf_hdr[12], pseudo_header->erf.phdr.lctr);
1655 phtons(&erf_hdr[14], pseudo_header->erf.phdr.wlen);
1656 size = sizeof(struct erf_phdr);
1658 switch(pseudo_header->erf.phdr.type & 0x7F) {
1659 case ERF_TYPE_MC_HDLC:
1660 case ERF_TYPE_MC_RAW:
1661 case ERF_TYPE_MC_ATM:
1662 case ERF_TYPE_MC_RAW_CHANNEL:
1663 case ERF_TYPE_MC_AAL5:
1664 case ERF_TYPE_MC_AAL2:
1665 case ERF_TYPE_COLOR_MC_HDLC_POS:
1666 phtonl(&erf_hdr[16], pseudo_header->erf.subhdr.mc_hdr);
1667 size += (int)sizeof(struct erf_mc_hdr);
1670 case ERF_TYPE_COLOR_ETH:
1671 case ERF_TYPE_DSM_COLOR_ETH:
1672 phtons(&erf_hdr[16], pseudo_header->erf.subhdr.eth_hdr);
1673 size += (int)sizeof(struct erf_eth_hdr);
1678 nwritten = wtap_dump_file_write(wdh, erf_hdr, size);
1679 if (nwritten != (guint) size) {
1680 if (nwritten == 0 && wtap_dump_file_ferror(wdh))
1681 *err = wtap_dump_file_ferror(wdh);
1683 *err = WTAP_ERR_SHORT_WRITE;
1686 wdh->bytes_dumped += size;
1689 case WTAP_ENCAP_I2C:
1691 * Write the I2C header.
1693 memset(&i2c_hdr, 0, sizeof(i2c_hdr));
1694 i2c_hdr.bus = pseudo_header->i2c.bus |
1695 (pseudo_header->i2c.is_event ? 0x80 : 0x00);
1696 phtonl((guint8 *)&i2c_hdr.flags, pseudo_header->i2c.flags);
1697 nwritten = fwrite(&i2c_hdr, 1, sizeof(i2c_hdr), wdh->fh);
1698 if (nwritten != sizeof(i2c_hdr)) {
1699 if (nwritten == 0 && ferror(wdh->fh))
1702 *err = WTAP_ERR_SHORT_WRITE;
1705 wdh->bytes_dumped += sizeof(i2c_hdr);
1708 case WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR:
1709 bt_hdr.direction = GUINT32_TO_BE(pseudo_header->p2p.sent ? LIBPCAP_BT_PHDR_SENT : LIBPCAP_BT_PHDR_RECV);
1710 nwritten = wtap_dump_file_write(wdh, &bt_hdr, sizeof bt_hdr);
1711 if (nwritten != sizeof bt_hdr) {
1712 if (nwritten == 0 && wtap_dump_file_ferror(wdh))
1713 *err = wtap_dump_file_ferror(wdh);
1715 *err = WTAP_ERR_SHORT_WRITE;
1718 wdh->bytes_dumped += sizeof bt_hdr;
1721 case WTAP_ENCAP_PPP_WITH_PHDR:
1722 ppp_hdr.direction = (pseudo_header->p2p.sent ? LIBPCAP_PPP_PHDR_SENT : LIBPCAP_PPP_PHDR_RECV);
1723 nwritten = wtap_dump_file_write(wdh, &ppp_hdr, sizeof ppp_hdr);
1724 if (nwritten != sizeof ppp_hdr) {
1725 if (nwritten == 0 && wtap_dump_file_ferror(wdh))
1726 *err = wtap_dump_file_ferror(wdh);
1728 *err = WTAP_ERR_SHORT_WRITE;
1731 wdh->bytes_dumped += sizeof ppp_hdr;