656 lines
20 KiB
C
656 lines
20 KiB
C
/* peekclassic.c
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* Routines for opening files in what Savvius (formerly WildPackets) calls
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* the classic file format in the description of their "PeekRdr Sample
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* Application" (C++ source code to read their capture files, downloading
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* of which requires a maintenance contract, so it's not free as in beer
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* and probably not as in speech, either).
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*
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* As that description says, it's used by AiroPeek and AiroPeek NX prior
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* to 2.0, EtherPeek prior to 6.0, and EtherPeek NX prior to 3.0. It
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* was probably also used by TokenPeek.
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*
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* This handles versions 5, 6, and 7 of that format (the format version
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* number is what appears in the file, and is distinct from the application
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* version number).
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*
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* Copyright (c) 2001, Daniel Thompson <d.thompson@gmx.net>
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*
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* Wiretap Library
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* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <errno.h>
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#include <string.h>
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#include "wtap-int.h"
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#include "file_wrappers.h"
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#include "peekclassic.h"
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/* CREDITS
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*
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* This file decoder could not have been writen without examining how
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* tcptrace (http://www.tcptrace.org/) handles EtherPeek files.
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*/
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/* master header */
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typedef struct peekclassic_master_header {
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guint8 version;
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guint8 status;
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} peekclassic_master_header_t;
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#define PEEKCLASSIC_MASTER_HDR_SIZE 2
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/* secondary header (V5,V6,V7) */
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typedef struct peekclassic_v567_header {
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guint32 filelength;
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guint32 numPackets;
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guint32 timeDate;
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guint32 timeStart;
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guint32 timeStop;
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guint32 mediaType; /* Media Type Ethernet=0 Token Ring = 1 */
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guint32 physMedium; /* Physical Medium native=0 802.1=1 */
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guint32 appVers; /* App Version Number Maj.Min.Bug.Build */
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guint32 linkSpeed; /* Link Speed Bits/sec */
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guint32 reserved[3];
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} peekclassic_v567_header_t;
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#define PEEKCLASSIC_V567_HDR_SIZE 48
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/* full header */
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typedef struct peekclassic_header {
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peekclassic_master_header_t master;
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union {
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peekclassic_v567_header_t v567;
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} secondary;
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} peekclassic_header_t;
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/*
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* Packet header (V5, V6).
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*
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* NOTE: the time stamp, although it's a 32-bit number, is only aligned
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* on a 16-bit boundary. (Does this date back to 68K Macs? The 68000
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* only required 16-bit alignment of 32-bit quantities, as did the 68010,
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* and the 68020/68030/68040 required no alignment.)
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*
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* As such, we cannot declare this as a C structure, as compilers on
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* most platforms will put 2 bytes of padding before the time stamp to
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* align it on a 32-bit boundary.
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*
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* So, instead, we #define numbers as the offsets of the fields.
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*/
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#define PEEKCLASSIC_V56_LENGTH_OFFSET 0
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#define PEEKCLASSIC_V56_SLICE_LENGTH_OFFSET 2
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#define PEEKCLASSIC_V56_FLAGS_OFFSET 4
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#define PEEKCLASSIC_V56_STATUS_OFFSET 5
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#define PEEKCLASSIC_V56_TIMESTAMP_OFFSET 6
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#define PEEKCLASSIC_V56_DESTNUM_OFFSET 10
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#define PEEKCLASSIC_V56_SRCNUM_OFFSET 12
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#define PEEKCLASSIC_V56_PROTONUM_OFFSET 14
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#define PEEKCLASSIC_V56_PROTOSTR_OFFSET 16
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#define PEEKCLASSIC_V56_FILTERNUM_OFFSET 24
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#define PEEKCLASSIC_V56_PKT_SIZE 26
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/* 64-bit time in micro seconds from the (Mac) epoch */
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typedef struct peekclassic_utime {
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guint32 upper;
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guint32 lower;
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} peekclassic_utime;
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/*
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* Packet header (V7).
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*
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* This doesn't have the same alignment problem, but we do it with
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* #defines anyway.
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*/
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#define PEEKCLASSIC_V7_PROTONUM_OFFSET 0
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#define PEEKCLASSIC_V7_LENGTH_OFFSET 2
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#define PEEKCLASSIC_V7_SLICE_LENGTH_OFFSET 4
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#define PEEKCLASSIC_V7_FLAGS_OFFSET 6
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#define PEEKCLASSIC_V7_STATUS_OFFSET 7
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#define PEEKCLASSIC_V7_TIMESTAMP_OFFSET 8
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#define PEEKCLASSIC_V7_PKT_SIZE 16
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typedef struct peekclassic_encap_lookup {
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guint16 protoNum;
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int encap;
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} peekclassic_encap_lookup_t;
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static const unsigned int mac2unix = 2082844800u;
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static const peekclassic_encap_lookup_t peekclassic_encap[] = {
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{ 1400, WTAP_ENCAP_ETHERNET }
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};
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#define NUM_PEEKCLASSIC_ENCAPS \
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(sizeof (peekclassic_encap) / sizeof (peekclassic_encap[0]))
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typedef struct {
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time_t reference_time;
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} peekclassic_t;
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static gboolean peekclassic_read_v7(wtap *wth, int *err, gchar **err_info,
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gint64 *data_offset);
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static gboolean peekclassic_seek_read_v7(wtap *wth, gint64 seek_off,
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wtap_rec *rec, Buffer *buf, int *err, gchar **err_info);
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static int peekclassic_read_packet_v7(wtap *wth, FILE_T fh,
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wtap_rec *rec, Buffer *buf, int *err, gchar **err_info);
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static gboolean peekclassic_read_v56(wtap *wth, int *err, gchar **err_info,
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gint64 *data_offset);
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static gboolean peekclassic_seek_read_v56(wtap *wth, gint64 seek_off,
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wtap_rec *rec, Buffer *buf, int *err, gchar **err_info);
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static gboolean peekclassic_read_packet_v56(wtap *wth, FILE_T fh,
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wtap_rec *rec, Buffer *buf, int *err, gchar **err_info);
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wtap_open_return_val peekclassic_open(wtap *wth, int *err, gchar **err_info)
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{
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peekclassic_header_t ep_hdr;
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time_t reference_time;
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int file_encap;
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peekclassic_t *peekclassic;
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/* Peek classic files do not start with a magic value large enough
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* to be unique; hence we use the following algorithm to determine
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* the type of an unknown file:
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* - populate the master header and reject file if there is no match
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* - populate the secondary header and check that the reserved space
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* is zero, and check some other fields; this isn't perfect,
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* and we may have to add more checks at some point.
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*/
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g_assert(sizeof(ep_hdr.master) == PEEKCLASSIC_MASTER_HDR_SIZE);
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if (!wtap_read_bytes(wth->fh, &ep_hdr.master,
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(int)sizeof(ep_hdr.master), err, err_info)) {
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if (*err != WTAP_ERR_SHORT_READ)
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return WTAP_OPEN_ERROR;
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return WTAP_OPEN_NOT_MINE;
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}
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/*
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* It appears that EtherHelp (a free application from WildPackets
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* that did blind capture, saving to a file, so that you could
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* give the resulting file to somebody with EtherPeek) saved
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* captures in EtherPeek format except that it ORed the 0x80
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* bit on in the version number.
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*
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* We therefore strip off the 0x80 bit in the version number.
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* Perhaps there's some reason to care whether the capture
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* came from EtherHelp; if we discover one, we should check
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* that bit.
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*/
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ep_hdr.master.version &= ~0x80;
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/* switch on the file version */
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switch (ep_hdr.master.version) {
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case 5:
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case 6:
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case 7:
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/* get the secondary header */
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g_assert(sizeof(ep_hdr.secondary.v567) ==
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PEEKCLASSIC_V567_HDR_SIZE);
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if (!wtap_read_bytes(wth->fh, &ep_hdr.secondary.v567,
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(int)sizeof(ep_hdr.secondary.v567), err, err_info)) {
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if (*err != WTAP_ERR_SHORT_READ)
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return WTAP_OPEN_ERROR;
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return WTAP_OPEN_NOT_MINE;
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}
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if ((0 != ep_hdr.secondary.v567.reserved[0]) ||
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(0 != ep_hdr.secondary.v567.reserved[1]) ||
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(0 != ep_hdr.secondary.v567.reserved[2])) {
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/* still unknown */
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return WTAP_OPEN_NOT_MINE;
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}
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/*
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* Check the mediaType and physMedium fields.
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* We assume it's not a Peek classic file if
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* these aren't values we know, rather than
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* reporting them as invalid Peek classic files,
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* as, given the lack of a magic number, we need
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* all the checks we can get.
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*/
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ep_hdr.secondary.v567.mediaType =
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g_ntohl(ep_hdr.secondary.v567.mediaType);
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ep_hdr.secondary.v567.physMedium =
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g_ntohl(ep_hdr.secondary.v567.physMedium);
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switch (ep_hdr.secondary.v567.physMedium) {
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case 0:
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/*
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* "Native" format, presumably meaning
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* Ethernet or Token Ring.
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*/
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switch (ep_hdr.secondary.v567.mediaType) {
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case 0:
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file_encap = WTAP_ENCAP_ETHERNET;
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break;
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case 1:
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file_encap = WTAP_ENCAP_TOKEN_RING;
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break;
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default:
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/*
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* Assume this isn't a Peek classic file.
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*/
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return WTAP_OPEN_NOT_MINE;
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}
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break;
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case 1:
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switch (ep_hdr.secondary.v567.mediaType) {
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case 0:
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/*
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* 802.11, with a private header giving
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* some radio information. Presumably
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* this is from AiroPeek.
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*/
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file_encap = WTAP_ENCAP_IEEE_802_11_WITH_RADIO;
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break;
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default:
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/*
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* Assume this isn't a Peek classic file.
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*/
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return WTAP_OPEN_NOT_MINE;
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}
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break;
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default:
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/*
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* Assume this isn't a Peek classic file.
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*/
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return WTAP_OPEN_NOT_MINE;
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}
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/*
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* Assume this is a V5, V6 or V7 Peek classic file, and
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* byte swap the rest of the fields in the secondary header.
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*
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* XXX - we could check the file length if the file were
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* uncompressed, but it might be compressed.
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*/
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ep_hdr.secondary.v567.filelength =
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g_ntohl(ep_hdr.secondary.v567.filelength);
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ep_hdr.secondary.v567.numPackets =
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g_ntohl(ep_hdr.secondary.v567.numPackets);
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ep_hdr.secondary.v567.timeDate =
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g_ntohl(ep_hdr.secondary.v567.timeDate);
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ep_hdr.secondary.v567.timeStart =
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g_ntohl(ep_hdr.secondary.v567.timeStart);
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ep_hdr.secondary.v567.timeStop =
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g_ntohl(ep_hdr.secondary.v567.timeStop);
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ep_hdr.secondary.v567.appVers =
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g_ntohl(ep_hdr.secondary.v567.appVers);
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ep_hdr.secondary.v567.linkSpeed =
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g_ntohl(ep_hdr.secondary.v567.linkSpeed);
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/* Get the reference time as a time_t */
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reference_time = ep_hdr.secondary.v567.timeDate - mac2unix;
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break;
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default:
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/*
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* Assume this isn't a Peek classic file.
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*/
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return WTAP_OPEN_NOT_MINE;
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}
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/*
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* This is a Peek classic file.
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*
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* At this point we have recognised the file type and have populated
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* the whole ep_hdr structure in host byte order.
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*/
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peekclassic = (peekclassic_t *)g_malloc(sizeof(peekclassic_t));
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wth->priv = (void *)peekclassic;
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peekclassic->reference_time = reference_time;
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switch (ep_hdr.master.version) {
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case 5:
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case 6:
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wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PEEKCLASSIC_V56;
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/*
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* XXX - can we get the file encapsulation from the
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* header in the same way we do for V7 files?
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*/
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wth->file_encap = WTAP_ENCAP_PER_PACKET;
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wth->subtype_read = peekclassic_read_v56;
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wth->subtype_seek_read = peekclassic_seek_read_v56;
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break;
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case 7:
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wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_PEEKCLASSIC_V7;
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wth->file_encap = file_encap;
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wth->subtype_read = peekclassic_read_v7;
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wth->subtype_seek_read = peekclassic_seek_read_v7;
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break;
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default:
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/* this is impossible */
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g_assert_not_reached();
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}
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wth->snapshot_length = 0; /* not available in header */
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wth->file_tsprec = WTAP_TSPREC_USEC;
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return WTAP_OPEN_MINE;
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}
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static gboolean peekclassic_read_v7(wtap *wth, int *err, gchar **err_info,
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gint64 *data_offset)
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{
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int sliceLength;
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*data_offset = file_tell(wth->fh);
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/* Read the packet. */
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sliceLength = peekclassic_read_packet_v7(wth, wth->fh, &wth->rec,
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wth->rec_data, err, err_info);
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if (sliceLength < 0)
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return FALSE;
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/* Skip extra ignored data at the end of the packet. */
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if ((guint32)sliceLength > wth->rec.rec_header.packet_header.caplen) {
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if (!wtap_read_bytes(wth->fh, NULL, sliceLength - wth->rec.rec_header.packet_header.caplen,
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err, err_info))
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return FALSE;
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}
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/* Records are padded to an even length, so if the slice length
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is odd, read the padding byte. */
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if (sliceLength & 0x01) {
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if (!wtap_read_bytes(wth->fh, NULL, 1, err, err_info))
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return FALSE;
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}
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return TRUE;
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}
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static gboolean peekclassic_seek_read_v7(wtap *wth, gint64 seek_off,
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wtap_rec *rec, Buffer *buf, int *err, gchar **err_info)
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{
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if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
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return FALSE;
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/* Read the packet. */
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if (peekclassic_read_packet_v7(wth, wth->random_fh, rec, buf,
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err, err_info) == -1) {
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if (*err == 0)
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*err = WTAP_ERR_SHORT_READ;
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return FALSE;
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}
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return TRUE;
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}
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#define RADIO_INFO_SIZE 4
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static int peekclassic_read_packet_v7(wtap *wth, FILE_T fh,
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wtap_rec *rec, Buffer *buf, int *err, gchar **err_info)
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{
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guint8 ep_pkt[PEEKCLASSIC_V7_PKT_SIZE];
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#if 0
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guint16 protoNum;
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#endif
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guint16 length;
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guint16 sliceLength;
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#if 0
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guint8 flags;
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#endif
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guint8 status;
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guint64 timestamp;
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time_t tsecs;
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guint32 tusecs;
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guint8 radio_info[RADIO_INFO_SIZE];
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if (!wtap_read_bytes_or_eof(fh, ep_pkt, sizeof(ep_pkt), err, err_info))
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return -1;
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/* Extract the fields from the packet */
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#if 0
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protoNum = pntoh16(&ep_pkt[PEEKCLASSIC_V7_PROTONUM_OFFSET]);
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#endif
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length = pntoh16(&ep_pkt[PEEKCLASSIC_V7_LENGTH_OFFSET]);
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sliceLength = pntoh16(&ep_pkt[PEEKCLASSIC_V7_SLICE_LENGTH_OFFSET]);
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#if 0
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flags = ep_pkt[PEEKCLASSIC_V7_FLAGS_OFFSET];
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#endif
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status = ep_pkt[PEEKCLASSIC_V7_STATUS_OFFSET];
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timestamp = pntoh64(&ep_pkt[PEEKCLASSIC_V7_TIMESTAMP_OFFSET]);
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/* force sliceLength to be the actual length of the packet */
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if (0 == sliceLength) {
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sliceLength = length;
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}
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/*
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* The maximum value of sliceLength and length are 65535, which
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* are less than WTAP_MAX_PACKET_SIZE_STANDARD will ever be, so we don't
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* need to check them.
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*/
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/* fill in packet header values */
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rec->rec_type = REC_TYPE_PACKET;
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rec->presence_flags = WTAP_HAS_TS|WTAP_HAS_CAP_LEN;
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tsecs = (time_t) (timestamp/1000000);
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tusecs = (guint32) (timestamp - tsecs*1000000);
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rec->ts.secs = tsecs - mac2unix;
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rec->ts.nsecs = tusecs * 1000;
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rec->rec_header.packet_header.len = length;
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rec->rec_header.packet_header.caplen = sliceLength;
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switch (wth->file_encap) {
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case WTAP_ENCAP_IEEE_802_11_WITH_RADIO:
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memset(&rec->rec_header.packet_header.pseudo_header.ieee_802_11, 0, sizeof(rec->rec_header.packet_header.pseudo_header.ieee_802_11));
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.fcs_len = 0; /* no FCS */
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.decrypted = FALSE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.datapad = FALSE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_UNKNOWN;
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/*
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* Now process the radio information pseudo-header.
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* It's a 4-byte pseudo-header, consisting of:
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*
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* 1 byte of data rate, in units of 500 kb/s;
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*
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* 1 byte of channel number;
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*
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* 1 byte of signal strength as a percentage of
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* the maximum, i.e. (RXVECTOR RSSI/RXVECTOR RSSI_Max)*100,
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* or, at least, that's what I infer it is, given what
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* the WildPackets note "Converting Signal Strength
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* Percentage to dBm Values" says (it also says that
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* the conversion the percentage to a dBm value is
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* an adapter-dependent process, so, as we don't know
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* what type of adapter was used to do the capture,
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* we can't do the conversion);
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*
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* 1 byte of unknown content (padding?).
|
|
*/
|
|
if (rec->rec_header.packet_header.len < RADIO_INFO_SIZE || rec->rec_header.packet_header.caplen < RADIO_INFO_SIZE) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("peekclassic: 802.11 packet has length < 4");
|
|
return -1;
|
|
}
|
|
rec->rec_header.packet_header.len -= RADIO_INFO_SIZE;
|
|
rec->rec_header.packet_header.caplen -= RADIO_INFO_SIZE;
|
|
sliceLength -= RADIO_INFO_SIZE;
|
|
|
|
/* read the pseudo-header */
|
|
if (!wtap_read_bytes(fh, radio_info, RADIO_INFO_SIZE, err, err_info))
|
|
return -1;
|
|
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_data_rate = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.data_rate = radio_info[0];
|
|
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_channel = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.channel = radio_info[1];
|
|
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_signal_percent = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.signal_percent = radio_info[2];
|
|
|
|
/*
|
|
* The last 4 bytes appear to be random data - the length
|
|
* might include the FCS - so we reduce the length by 4.
|
|
*
|
|
* Or maybe this is just the same kind of random 4 bytes
|
|
* of junk at the end you get in Wireless Sniffer
|
|
* captures.
|
|
*/
|
|
if (rec->rec_header.packet_header.len < 4 || rec->rec_header.packet_header.caplen < 4) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("peekclassic: 802.11 packet has length < 8");
|
|
return -1;
|
|
}
|
|
rec->rec_header.packet_header.len -= 4;
|
|
rec->rec_header.packet_header.caplen -= 4;
|
|
break;
|
|
|
|
case WTAP_ENCAP_ETHERNET:
|
|
/* XXX - it appears that if the low-order bit of
|
|
"status" is 0, there's an FCS in this frame,
|
|
and if it's 1, there's 4 bytes of 0. */
|
|
rec->rec_header.packet_header.pseudo_header.eth.fcs_len = (status & 0x01) ? 0 : 4;
|
|
break;
|
|
}
|
|
|
|
/* read the packet data */
|
|
if (!wtap_read_packet_bytes(fh, buf, rec->rec_header.packet_header.caplen, err, err_info))
|
|
return -1;
|
|
|
|
return sliceLength;
|
|
}
|
|
|
|
static gboolean peekclassic_read_v56(wtap *wth, int *err, gchar **err_info,
|
|
gint64 *data_offset)
|
|
{
|
|
*data_offset = file_tell(wth->fh);
|
|
|
|
/* read the packet */
|
|
if (!peekclassic_read_packet_v56(wth, wth->fh, &wth->rec,
|
|
wth->rec_data, err, err_info))
|
|
return FALSE;
|
|
|
|
/*
|
|
* XXX - is the captured packet data padded to a multiple
|
|
* of 2 bytes?
|
|
*/
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean peekclassic_seek_read_v56(wtap *wth, gint64 seek_off,
|
|
wtap_rec *rec, Buffer *buf, int *err, gchar **err_info)
|
|
{
|
|
if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
|
|
return FALSE;
|
|
|
|
/* read the packet */
|
|
if (!peekclassic_read_packet_v56(wth, wth->random_fh, rec, buf,
|
|
err, err_info)) {
|
|
if (*err == 0)
|
|
*err = WTAP_ERR_SHORT_READ;
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean peekclassic_read_packet_v56(wtap *wth, FILE_T fh,
|
|
wtap_rec *rec, Buffer *buf, int *err, gchar **err_info)
|
|
{
|
|
peekclassic_t *peekclassic = (peekclassic_t *)wth->priv;
|
|
guint8 ep_pkt[PEEKCLASSIC_V56_PKT_SIZE];
|
|
guint16 length;
|
|
guint16 sliceLength;
|
|
#if 0
|
|
guint8 flags;
|
|
guint8 status;
|
|
#endif
|
|
guint32 timestamp;
|
|
#if 0
|
|
guint16 destNum;
|
|
guint16 srcNum;
|
|
#endif
|
|
guint16 protoNum;
|
|
#if 0
|
|
char protoStr[8];
|
|
#endif
|
|
unsigned int i;
|
|
|
|
if (!wtap_read_bytes_or_eof(fh, ep_pkt, sizeof(ep_pkt), err, err_info))
|
|
return FALSE;
|
|
|
|
/* Extract the fields from the packet */
|
|
length = pntoh16(&ep_pkt[PEEKCLASSIC_V56_LENGTH_OFFSET]);
|
|
sliceLength = pntoh16(&ep_pkt[PEEKCLASSIC_V56_SLICE_LENGTH_OFFSET]);
|
|
#if 0
|
|
flags = ep_pkt[PEEKCLASSIC_V56_FLAGS_OFFSET];
|
|
status = ep_pkt[PEEKCLASSIC_V56_STATUS_OFFSET];
|
|
#endif
|
|
timestamp = pntoh32(&ep_pkt[PEEKCLASSIC_V56_TIMESTAMP_OFFSET]);
|
|
#if 0
|
|
destNum = pntoh16(&ep_pkt[PEEKCLASSIC_V56_DESTNUM_OFFSET]);
|
|
srcNum = pntoh16(&ep_pkt[PEEKCLASSIC_V56_SRCNUM_OFFSET]);
|
|
#endif
|
|
protoNum = pntoh16(&ep_pkt[PEEKCLASSIC_V56_PROTONUM_OFFSET]);
|
|
#if 0
|
|
memcpy(protoStr, &ep_pkt[PEEKCLASSIC_V56_PROTOSTR_OFFSET],
|
|
sizeof protoStr);
|
|
#endif
|
|
|
|
/*
|
|
* XXX - is the captured packet data padded to a multiple
|
|
* of 2 bytes?
|
|
*/
|
|
|
|
/* force sliceLength to be the actual length of the packet */
|
|
if (0 == sliceLength) {
|
|
sliceLength = length;
|
|
}
|
|
/*
|
|
* The maximum value of sliceLength and length are 65535, which
|
|
* are less than WTAP_MAX_PACKET_SIZE_STANDARD will ever be, so we don't
|
|
* need to check them.
|
|
*/
|
|
|
|
/* fill in packet header values */
|
|
rec->rec_type = REC_TYPE_PACKET;
|
|
rec->presence_flags = WTAP_HAS_TS|WTAP_HAS_CAP_LEN;
|
|
/* timestamp is in milliseconds since reference_time */
|
|
rec->ts.secs = peekclassic->reference_time + (timestamp / 1000);
|
|
rec->ts.nsecs = 1000 * (timestamp % 1000) * 1000;
|
|
rec->rec_header.packet_header.len = length;
|
|
rec->rec_header.packet_header.caplen = sliceLength;
|
|
|
|
rec->rec_header.packet_header.pkt_encap = WTAP_ENCAP_UNKNOWN;
|
|
for (i=0; i<NUM_PEEKCLASSIC_ENCAPS; i++) {
|
|
if (peekclassic_encap[i].protoNum == protoNum) {
|
|
rec->rec_header.packet_header.pkt_encap = peekclassic_encap[i].encap;
|
|
}
|
|
}
|
|
|
|
switch (rec->rec_header.packet_header.pkt_encap) {
|
|
|
|
case WTAP_ENCAP_ETHERNET:
|
|
/* We assume there's no FCS in this frame. */
|
|
rec->rec_header.packet_header.pseudo_header.eth.fcs_len = 0;
|
|
break;
|
|
}
|
|
|
|
/* read the packet data */
|
|
return wtap_read_packet_bytes(fh, buf, sliceLength, err, err_info);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|