![Guy Harris](/assets/img/avatar_default.png)
aren't 1/1193000.0 second; the code used to use 1/1193180.0 second, but at least one capture appears to have units of somewhere around 1/3579540.0 second. svn path=/trunk/; revision=7388
1236 lines
35 KiB
C
1236 lines
35 KiB
C
/* netxray.c
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*
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* $Id: netxray.c,v 1.81 2003/03/31 21:11:49 guy Exp $
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdlib.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 "netxray.h"
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#include "buffer.h"
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#include "atm.h"
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/* Capture file header, *including* magic number, is padded to 128 bytes. */
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#define CAPTUREFILE_HEADER_SIZE 128
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/* Magic number in NetXRay 1.x files. */
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static const char old_netxray_magic[] = {
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'V', 'L', '\0', '\0'
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};
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/* Magic number in NetXRay 2.0 and later, and Windows Sniffer, files. */
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static const char netxray_magic[] = { /* magic header */
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'X', 'C', 'P', '\0'
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};
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/* NetXRay file header (minus magic number). */
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struct netxray_hdr {
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char version[8]; /* version number */
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guint32 start_time; /* UNIX time when capture started */
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guint32 nframes; /* number of packets */
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guint32 xxx; /* unknown */
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guint32 start_offset; /* offset of first packet in capture */
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guint32 end_offset; /* offset after last packet in capture */
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guint32 xxy[3]; /* unknown */
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guint16 network; /* datalink type */
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guint8 xxz[2]; /* XXX - is this the upper 2 bytes of the datalink type? */
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guint8 timeunit; /* encodes length of a tick */
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guint8 xxa[3]; /* XXX - is this the upper 3 bytes of the time units? */
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guint32 timelo; /* lower 32 bits of time stamp of capture start */
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guint32 timehi; /* upper 32 bits of time stamp of capture start */
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guint32 linespeed; /* speed of network, in bits/second */
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guint8 xxb[64]; /* other stuff */
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};
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/*
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* Capture type, in xxb[20].
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*/
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#define CAPTYPE_NDIS 0 /* Capture on network interface using NDIS */
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#define CAPTYPE_BROUTER 1 /* Bridge/router captured with pod */
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#define CAPTYPE_GIGPOD 2 /* gigabit Ethernet captured with pod */
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#define CAPTYPE_PPP 3 /* PPP captured with pod */
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#define CAPTYPE_FRELAY 4 /* Frame Relay captured with pod */
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#define CAPTYPE_BROUTER2 5 /* Bridge/router captured with pod */
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#define CAPTYPE_HDLC 6 /* HDLC (X.25, ISDN) captured with pod */
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#define CAPTYPE_SDLC 7 /* SDLC captured with pod */
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#define CAPTYPE_HDLC2 8 /* HDLC captured with pod */
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#define CAPTYPE_BROUTER3 9 /* Bridge/router captured with pod */
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#define CAPTYPE_SMDS 10 /* SMDS DXI */
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#define CAPTYPE_BROUTER4 11 /* Bridge/router captured with pod */
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#define CAPTYPE_BROUTER5 12 /* Bridge/router captured with pod */
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/*
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* # of ticks that equal 1 second
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*
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* XXX - the third item was 1193180.0, presumably because somebody found
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* it gave the right answer for some captures, but 3 times that, i.e.
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* 3579540.0, appears to give the right answer for some other captures.
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*
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* Is there something else in the file header to indicate which of those
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* is correct?
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*/
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static double TpS[] = { 1e6, 1193000.0, 3579540.0 };
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#define NUM_NETXRAY_TIMEUNITS (sizeof TpS / sizeof TpS[0])
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/* Version number strings. */
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static const char vers_1_0[] = {
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'0', '0', '1', '.', '0', '0', '0', '\0'
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};
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static const char vers_1_1[] = {
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'0', '0', '1', '.', '1', '0', '0', '\0'
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};
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static const char vers_2_000[] = {
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'0', '0', '2', '.', '0', '0', '0', '\0'
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};
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static const char vers_2_001[] = {
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'0', '0', '2', '.', '0', '0', '1', '\0'
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};
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static const char vers_2_002[] = {
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'0', '0', '2', '.', '0', '0', '2', '\0'
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};
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/* Old NetXRay data record format - followed by frame data. */
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struct old_netxrayrec_hdr {
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guint32 timelo; /* lower 32 bits of time stamp */
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guint32 timehi; /* upper 32 bits of time stamp */
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guint16 len; /* packet length */
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guint8 xxx[6]; /* unknown */
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};
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/* NetXRay format version 1.x data record format - followed by frame data. */
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struct netxrayrec_1_x_hdr {
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guint32 timelo; /* lower 32 bits of time stamp */
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guint32 timehi; /* upper 32 bits of time stamp */
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guint16 orig_len; /* packet length */
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guint16 incl_len; /* capture length */
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guint8 xxx[16]; /* unknown */
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};
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/* NetXRay format version 2.x data record format - followed by frame data. */
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struct netxrayrec_2_x_hdr {
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guint32 timelo; /* lower 32 bits of time stamp */
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guint32 timehi; /* upper 32 bits of time stamp */
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guint16 orig_len; /* packet length */
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guint16 incl_len; /* capture length */
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guint8 xxx[28]; /* various data */
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};
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/*
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* Union of the data record headers.
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*/
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union netxrayrec_hdr {
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struct old_netxrayrec_hdr old_hdr;
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struct netxrayrec_1_x_hdr hdr_1_x;
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struct netxrayrec_2_x_hdr hdr_2_x;
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};
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static gboolean netxray_read(wtap *wth, int *err, long *data_offset);
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static gboolean netxray_seek_read(wtap *wth, long seek_off,
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union wtap_pseudo_header *pseudo_header, guchar *pd, int length, int *err);
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static int netxray_read_rec_header(wtap *wth, FILE_T fh,
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union netxrayrec_hdr *hdr, int *err);
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static void netxray_set_pseudo_header(wtap *wth, const guint8 *pd, int len,
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union wtap_pseudo_header *pseudo_header, union netxrayrec_hdr *hdr);
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static gboolean netxray_read_rec_data(FILE_T fh, guint8 *data_ptr,
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guint32 packet_size, int *err);
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static void netxray_close(wtap *wth);
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static gboolean netxray_dump_1_1(wtap_dumper *wdh,
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const struct wtap_pkthdr *phdr,
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const union wtap_pseudo_header *pseudo_header, const guchar *pd, int *err);
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static gboolean netxray_dump_close_1_1(wtap_dumper *wdh, int *err);
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static gboolean netxray_dump_2_0(wtap_dumper *wdh,
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const struct wtap_pkthdr *phdr,
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const union wtap_pseudo_header *pseudo_header, const guchar *pd, int *err);
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static gboolean netxray_dump_close_2_0(wtap_dumper *wdh, int *err);
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int netxray_open(wtap *wth, int *err)
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{
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int bytes_read;
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char magic[sizeof netxray_magic];
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gboolean is_old;
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struct netxray_hdr hdr;
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double timeunit;
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int version_major;
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int file_type;
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double t;
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static const int netxray_encap[] = {
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WTAP_ENCAP_ETHERNET,
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WTAP_ENCAP_TOKEN_RING,
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WTAP_ENCAP_FDDI_BITSWAPPED,
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/*
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* XXX - PPP captures may look like Ethernet, perhaps
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* because they're using NDIS to capture on the
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* same machine and it provides simulated-Ethernet
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* packets, but at least one ISDN capture uses the
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* same network type value but isn't shaped like
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* Ethernet.
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*/
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WTAP_ENCAP_ETHERNET, /* WAN(PPP), but shaped like Ethernet */
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WTAP_ENCAP_UNKNOWN, /* LocalTalk */
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WTAP_ENCAP_UNKNOWN, /* "DIX" - should not occur */
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WTAP_ENCAP_UNKNOWN, /* ARCNET raw */
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WTAP_ENCAP_UNKNOWN, /* ARCNET 878.2 */
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WTAP_ENCAP_ATM_PDUS_UNTRUNCATED, /* ATM */
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WTAP_ENCAP_IEEE_802_11_WITH_RADIO,
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/* Wireless WAN with radio information */
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WTAP_ENCAP_UNKNOWN /* IrDA */
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};
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#define NUM_NETXRAY_ENCAPS (sizeof netxray_encap / sizeof netxray_encap[0])
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int file_encap;
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guint isdn_type = 0;
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/* Read in the string that should be at the start of a NetXRay
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* file */
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errno = WTAP_ERR_CANT_READ;
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bytes_read = file_read(magic, 1, sizeof magic, wth->fh);
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if (bytes_read != sizeof magic) {
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*err = file_error(wth->fh);
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if (*err != 0)
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return -1;
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return 0;
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}
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wth->data_offset += sizeof magic;
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if (memcmp(magic, netxray_magic, sizeof magic) == 0) {
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is_old = FALSE;
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} else if (memcmp(magic, old_netxray_magic, sizeof magic) == 0) {
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is_old = TRUE;
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} else {
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return 0;
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}
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/* Read the rest of the header. */
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errno = WTAP_ERR_CANT_READ;
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bytes_read = file_read(&hdr, 1, sizeof hdr, wth->fh);
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if (bytes_read != sizeof hdr) {
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*err = file_error(wth->fh);
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if (*err != 0)
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return -1;
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return 0;
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}
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wth->data_offset += sizeof hdr;
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if (is_old) {
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timeunit = 1000.0;
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version_major = 0;
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file_type = WTAP_FILE_NETXRAY_OLD;
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} else {
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/* It appears that version 1.1 files (as produced by Windows
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* Sniffer Pro 2.0.01) have the time stamp in microseconds,
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* rather than the milliseconds version 1.0 files appear to
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* have.
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*
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* It also appears that version 2.00x files have per-packet
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* headers with some extra fields. */
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if (memcmp(hdr.version, vers_1_0, sizeof vers_1_0) == 0) {
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timeunit = 1000.0;
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version_major = 1;
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file_type = WTAP_FILE_NETXRAY_1_0;
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} else if (memcmp(hdr.version, vers_1_1, sizeof vers_1_1) == 0) {
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timeunit = 1000000.0;
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version_major = 1;
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file_type = WTAP_FILE_NETXRAY_1_1;
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} else if (memcmp(hdr.version, vers_2_000, sizeof vers_2_000) == 0
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|| memcmp(hdr.version, vers_2_001, sizeof vers_2_001) == 0
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|| memcmp(hdr.version, vers_2_002, sizeof vers_2_002) == 0) {
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/*
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* It appears that, at least for Ethernet
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* captures, if hdr.xxb[20] is 2, that indicates
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* that it's a gigabit Ethernet capture, possibly
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* from a special whizzo gigabit pod, and also
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* indicates that the time stamps have some
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* higher resolution than in other captures,
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* possibly thanks to a high-resolution
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* timer on the pod.
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*/
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if (hdr.network == 0 && hdr.xxb[20] == CAPTYPE_GIGPOD) {
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/*
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* It appears that the time units for these
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* captures are nanoseconds, unless
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* hdr.timeunit is 2, in which case it's
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* 1/31250000.0 of a second.
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*/
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if (hdr.timeunit == 2)
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timeunit = 31250000.0;
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else
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timeunit = 1e9;
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} else {
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if (hdr.timeunit > NUM_NETXRAY_TIMEUNITS) {
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g_message("netxray: Unknown timeunit %u",
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hdr.timeunit);
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*err = WTAP_ERR_UNSUPPORTED;
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return -1;
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}
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timeunit = TpS[hdr.timeunit];
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}
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version_major = 2;
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file_type = WTAP_FILE_NETXRAY_2_00x;
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} else {
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g_message("netxray: version \"%.8s\" unsupported", hdr.version);
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*err = WTAP_ERR_UNSUPPORTED;
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return -1;
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}
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}
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hdr.network = pletohs(&hdr.network);
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if (hdr.network >= NUM_NETXRAY_ENCAPS
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|| netxray_encap[hdr.network] == WTAP_ENCAP_UNKNOWN) {
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g_message("netxray: network type %u unknown or unsupported",
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hdr.network);
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*err = WTAP_ERR_UNSUPPORTED_ENCAP;
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return -1;
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}
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if (hdr.network == 3) {
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/*
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* In version 0 and 1, we assume, for now, that all
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* WAN captures have frames that look like Ethernet
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* frames (as a result, presumably, of having passed
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* through NDISWAN).
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*
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* In version 2, it looks as if there's stuff in the "xxb"
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* words of the file header to specify what particular
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* type of WAN capture we have.
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*/
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if (version_major == 2) {
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switch (hdr.xxb[20]) {
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case CAPTYPE_PPP:
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/*
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* PPP.
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*/
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file_encap = WTAP_ENCAP_PPP_WITH_PHDR;
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break;
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case CAPTYPE_FRELAY:
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/*
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* Frame Relay.
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*/
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file_encap = WTAP_ENCAP_FRELAY_WITH_PHDR;
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break;
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case CAPTYPE_HDLC:
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case CAPTYPE_HDLC2:
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/*
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* Various HDLC flavors?
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*/
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switch (hdr.xxb[28]) {
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case 0: /* LAPB/X.25 */
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file_encap = WTAP_ENCAP_LAPB;
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break;
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case 1: /* E1 PRI */
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case 2: /* T1 PRI */
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case 3: /* BRI */
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file_encap = WTAP_ENCAP_ISDN;
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isdn_type = hdr.xxb[28];
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break;
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default:
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g_message("netxray: WAN HDLC capture subsubtype 0x%02x unknown or unsupported",
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hdr.xxb[28]);
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*err = WTAP_ERR_UNSUPPORTED_ENCAP;
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return -1;
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}
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break;
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case CAPTYPE_SDLC:
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/*
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* SDLC.
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*/
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file_encap = WTAP_ENCAP_SDLC;
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break;
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default:
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g_message("netxray: WAN capture subtype 0x%02x unknown or unsupported",
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hdr.xxb[20]);
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*err = WTAP_ERR_UNSUPPORTED_ENCAP;
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return -1;
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}
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} else
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file_encap = WTAP_ENCAP_ETHERNET;
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} else
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file_encap = netxray_encap[hdr.network];
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/* This is a netxray file */
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wth->file_type = file_type;
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wth->capture.netxray = g_malloc(sizeof(netxray_t));
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wth->subtype_read = netxray_read;
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wth->subtype_seek_read = netxray_seek_read;
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wth->subtype_close = netxray_close;
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wth->file_encap = file_encap;
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wth->snapshot_length = 0; /* not available in header */
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wth->capture.netxray->start_time = pletohl(&hdr.start_time);
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wth->capture.netxray->timeunit = timeunit;
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t = (double)pletohl(&hdr.timelo)
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+ (double)pletohl(&hdr.timehi)*4294967296.0;
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t = t/timeunit;
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wth->capture.netxray->start_timestamp = t;
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wth->capture.netxray->version_major = version_major;
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/*
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* End-of-packet padding. 802.11 captures appear to have four
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* bytes of it, as do some ISDN captures; those 4 bytes don't
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* show up as frame data.
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*
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* We've seen what appears to be an FCS at the end of some frames
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* in some Ethernet captures, but this stuff appears to be just
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* padding - Sniffers don't show it, and it doesn't have values
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* that look like FCS values, so it looks like padding.
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*/
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wth->capture.netxray->padding = 0;
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switch (file_encap) {
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case WTAP_ENCAP_IEEE_802_11_WITH_RADIO:
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wth->capture.netxray->padding = 4;
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break;
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case WTAP_ENCAP_ISDN:
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/*
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* The only captures we've seen with padding are PRI
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* captures; until we see PRI captures with no padding,
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* or BRI captures with padding, we assume that PRI
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* captures have padding and BRI captures don't.
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*/
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if (isdn_type == 1 || isdn_type == 2)
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wth->capture.netxray->padding = 4;
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break;
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}
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/*
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* Remember the ISDN type, as we need it to interpret the
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* channel number in ISDN captures.
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*/
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wth->capture.netxray->isdn_type = isdn_type;
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/* Remember the offset after the last packet in the capture (which
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* isn't necessarily the last packet in the file), as it appears
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* there's sometimes crud after it. */
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wth->capture.netxray->wrapped = FALSE;
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wth->capture.netxray->end_offset = pletohl(&hdr.end_offset);
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/* Seek to the beginning of the data records. */
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if (file_seek(wth->fh, pletohl(&hdr.start_offset), SEEK_SET, err) == -1) {
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g_free(wth->capture.netxray);
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return -1;
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}
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wth->data_offset = pletohl(&hdr.start_offset);
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return 1;
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}
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|
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/* Read the next packet */
|
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static gboolean netxray_read(wtap *wth, int *err, long *data_offset)
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{
|
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guint32 packet_size;
|
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union netxrayrec_hdr hdr;
|
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int hdr_size;
|
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double t;
|
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guint8 *pd;
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|
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reread:
|
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/* Have we reached the end of the packet data? */
|
|
if (wth->data_offset == wth->capture.netxray->end_offset) {
|
|
/* Yes. */
|
|
*err = 0; /* it's just an EOF, not an error */
|
|
return FALSE;
|
|
}
|
|
/* Read record header. */
|
|
hdr_size = netxray_read_rec_header(wth, wth->fh, &hdr, err);
|
|
if (hdr_size == 0) {
|
|
/*
|
|
* Error or EOF.
|
|
*/
|
|
if (*err != 0) {
|
|
/*
|
|
* Error of some sort; give up.
|
|
*/
|
|
return FALSE;
|
|
}
|
|
|
|
/* We're at EOF. Wrap? */
|
|
if (!wth->capture.netxray->wrapped) {
|
|
/* Yes. Remember that we did. */
|
|
wth->capture.netxray->wrapped = TRUE;
|
|
if (file_seek(wth->fh, CAPTUREFILE_HEADER_SIZE,
|
|
SEEK_SET, err) == -1)
|
|
return FALSE;
|
|
wth->data_offset = CAPTUREFILE_HEADER_SIZE;
|
|
goto reread;
|
|
}
|
|
|
|
/* We've already wrapped - don't wrap again. */
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* Return the offset of the record header, so we can reread it
|
|
* if we go back to this frame.
|
|
*/
|
|
*data_offset = wth->data_offset;
|
|
wth->data_offset += hdr_size;
|
|
|
|
/*
|
|
* Read the packet data.
|
|
*/
|
|
if (wth->capture.netxray->version_major == 0)
|
|
packet_size = pletohs(&hdr.old_hdr.len);
|
|
else
|
|
packet_size = pletohs(&hdr.hdr_1_x.incl_len);
|
|
buffer_assure_space(wth->frame_buffer, packet_size);
|
|
pd = buffer_start_ptr(wth->frame_buffer);
|
|
if (!netxray_read_rec_data(wth->fh, pd, packet_size, err))
|
|
return FALSE;
|
|
wth->data_offset += packet_size;
|
|
|
|
/*
|
|
* Set the pseudo-header.
|
|
*/
|
|
netxray_set_pseudo_header(wth, pd, packet_size, &wth->pseudo_header,
|
|
&hdr);
|
|
|
|
if (wth->capture.netxray->version_major == 0) {
|
|
t = (double)pletohl(&hdr.old_hdr.timelo)
|
|
+ (double)pletohl(&hdr.old_hdr.timehi)*4294967296.0;
|
|
t /= wth->capture.netxray->timeunit;
|
|
t -= wth->capture.netxray->start_timestamp;
|
|
wth->phdr.ts.tv_sec = wth->capture.netxray->start_time + (long)t;
|
|
wth->phdr.ts.tv_usec = (unsigned long)((t-(double)(unsigned long)(t))
|
|
*1.0e6);
|
|
/*
|
|
* We subtract the padding from the packet size, so our caller
|
|
* doesn't see it.
|
|
*/
|
|
wth->phdr.caplen = packet_size - wth->capture.netxray->padding;
|
|
wth->phdr.len = wth->phdr.caplen;
|
|
} else {
|
|
t = (double)pletohl(&hdr.hdr_1_x.timelo)
|
|
+ (double)pletohl(&hdr.hdr_1_x.timehi)*4294967296.0;
|
|
t /= wth->capture.netxray->timeunit;
|
|
t -= wth->capture.netxray->start_timestamp;
|
|
wth->phdr.ts.tv_sec = wth->capture.netxray->start_time + (long)t;
|
|
wth->phdr.ts.tv_usec = (unsigned long)((t-(double)(unsigned long)(t))
|
|
*1.0e6);
|
|
/*
|
|
* We subtract the padding from the packet size, so our caller
|
|
* doesn't see it.
|
|
*/
|
|
wth->phdr.caplen = packet_size - wth->capture.netxray->padding;
|
|
wth->phdr.len = pletohs(&hdr.hdr_1_x.orig_len) - wth->capture.netxray->padding;
|
|
}
|
|
wth->phdr.pkt_encap = wth->file_encap;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
netxray_seek_read(wtap *wth, long seek_off,
|
|
union wtap_pseudo_header *pseudo_header, guchar *pd, int length, int *err)
|
|
{
|
|
union netxrayrec_hdr hdr;
|
|
gboolean ret;
|
|
|
|
if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
|
|
return FALSE;
|
|
|
|
if (!netxray_read_rec_header(wth, wth->random_fh, &hdr, err)) {
|
|
if (*err == 0) {
|
|
/*
|
|
* EOF - we report that as a short read, as
|
|
* we've read this once and know that it
|
|
* should be there.
|
|
*/
|
|
*err = WTAP_ERR_SHORT_READ;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* Read the packet data.
|
|
*/
|
|
ret = netxray_read_rec_data(wth->random_fh, pd, length, err);
|
|
if (!ret)
|
|
return FALSE;
|
|
/*
|
|
* Set the pseudo-header.
|
|
*/
|
|
netxray_set_pseudo_header(wth, pd, length, pseudo_header, &hdr);
|
|
return TRUE;
|
|
}
|
|
|
|
static int
|
|
netxray_read_rec_header(wtap *wth, FILE_T fh, union netxrayrec_hdr *hdr,
|
|
int *err)
|
|
{
|
|
int bytes_read;
|
|
int hdr_size = 0;
|
|
|
|
/* Read record header. */
|
|
switch (wth->capture.netxray->version_major) {
|
|
|
|
case 0:
|
|
hdr_size = sizeof (struct old_netxrayrec_hdr);
|
|
break;
|
|
|
|
case 1:
|
|
hdr_size = sizeof (struct netxrayrec_1_x_hdr);
|
|
break;
|
|
|
|
case 2:
|
|
hdr_size = sizeof (struct netxrayrec_2_x_hdr);
|
|
break;
|
|
}
|
|
errno = WTAP_ERR_CANT_READ;
|
|
bytes_read = file_read(hdr, 1, hdr_size, fh);
|
|
if (bytes_read != hdr_size) {
|
|
*err = file_error(wth->fh);
|
|
if (*err != 0)
|
|
return 0;
|
|
if (bytes_read != 0) {
|
|
*err = WTAP_ERR_SHORT_READ;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We're at EOF. "*err" is 0; we return FALSE - that
|
|
* combination tells our caller we're at EOF.
|
|
*/
|
|
return 0;
|
|
}
|
|
return hdr_size;
|
|
}
|
|
|
|
static void
|
|
netxray_set_pseudo_header(wtap *wth, const guint8 *pd, int len,
|
|
union wtap_pseudo_header *pseudo_header, union netxrayrec_hdr *hdr)
|
|
{
|
|
/*
|
|
* If this is 802.11, ISDN, X.25, or ATM, set the pseudo-header.
|
|
*/
|
|
if (wth->capture.netxray->version_major == 2) {
|
|
switch (wth->file_encap) {
|
|
|
|
case WTAP_ENCAP_IEEE_802_11_WITH_RADIO:
|
|
pseudo_header->ieee_802_11.channel =
|
|
hdr->hdr_2_x.xxx[12];
|
|
pseudo_header->ieee_802_11.data_rate =
|
|
hdr->hdr_2_x.xxx[13];
|
|
pseudo_header->ieee_802_11.signal_level =
|
|
hdr->hdr_2_x.xxx[14];
|
|
break;
|
|
|
|
case WTAP_ENCAP_ISDN:
|
|
/*
|
|
* ISDN.
|
|
*
|
|
* The bottommost bit of byte 12 of "hdr.hdr_2_x.xxx"
|
|
* is the direction flag.
|
|
*
|
|
* The bottom 5 bits of byte 13 of "hdr.hdr_2_x.xxx"
|
|
* are the channel number, but some mapping is
|
|
* required for PRI. (Is it really just the time
|
|
* slot?)
|
|
*/
|
|
pseudo_header->isdn.uton =
|
|
(hdr->hdr_2_x.xxx[12] & 0x01);
|
|
pseudo_header->isdn.channel =
|
|
hdr->hdr_2_x.xxx[13] & 0x1F;
|
|
switch (wth->capture.netxray->isdn_type) {
|
|
|
|
case 1:
|
|
/*
|
|
* E1 PRI. Channel numbers 0 and 16
|
|
* are the D channel; channel numbers 1
|
|
* through 15 are B1 through B15; channel
|
|
* numbers 17 through 31 are B16 through
|
|
* B31.
|
|
*/
|
|
if (pseudo_header->isdn.channel == 16)
|
|
pseudo_header->isdn.channel = 0;
|
|
else if (pseudo_header->isdn.channel > 16)
|
|
pseudo_header->isdn.channel -= 1;
|
|
break;
|
|
|
|
case 2:
|
|
/*
|
|
* T1 PRI. Channel numbers 0 and 24
|
|
* are the D channel; channel numbers 1
|
|
* through 23 are B1 through B23.
|
|
*/
|
|
if (pseudo_header->isdn.channel == 24)
|
|
pseudo_header->isdn.channel = 0;
|
|
else if (pseudo_header->isdn.channel > 24)
|
|
pseudo_header->isdn.channel -= 1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case WTAP_ENCAP_LAPB:
|
|
case WTAP_ENCAP_FRELAY_WITH_PHDR:
|
|
/*
|
|
* LAPB/X.25 and Frame Relay.
|
|
*
|
|
* The bottommost bit of byte 12 of "hdr.hdr_2_x.xxx"
|
|
* is the direction flag. (Probably true for other
|
|
* HDLC encapsulations as well.)
|
|
*/
|
|
pseudo_header->x25.flags =
|
|
(hdr->hdr_2_x.xxx[12] & 0x01) ? 0x00 : FROM_DCE;
|
|
break;
|
|
|
|
case WTAP_ENCAP_PPP_WITH_PHDR:
|
|
case WTAP_ENCAP_SDLC:
|
|
pseudo_header->p2p.sent =
|
|
(hdr->hdr_2_x.xxx[12] & 0x01) ? TRUE : FALSE;
|
|
break;
|
|
|
|
case WTAP_ENCAP_ATM_PDUS_UNTRUNCATED:
|
|
pseudo_header->atm.flags = 0;
|
|
/*
|
|
* XXX - is 0x08 an "OAM cell" flag?
|
|
*/
|
|
if (hdr->hdr_2_x.xxx[9] & 0x04)
|
|
pseudo_header->atm.flags |= ATM_RAW_CELL;
|
|
pseudo_header->atm.vpi = hdr->hdr_2_x.xxx[11];
|
|
pseudo_header->atm.vci = pletohs(&hdr->hdr_2_x.xxx[12]);
|
|
pseudo_header->atm.channel =
|
|
(hdr->hdr_2_x.xxx[15] & 0x10)? 1 : 0;
|
|
pseudo_header->atm.cells = 0;
|
|
|
|
switch (hdr->hdr_2_x.xxx[0] & 0xF0) {
|
|
|
|
case 0x00: /* Unknown */
|
|
/*
|
|
* Infer the AAL, traffic type, and subtype.
|
|
*/
|
|
atm_guess_traffic_type(pd, len,
|
|
pseudo_header);
|
|
break;
|
|
|
|
case 0x50: /* AAL5 (including signalling) */
|
|
pseudo_header->atm.aal = AAL_5;
|
|
switch (hdr->hdr_2_x.xxx[0] & 0x0F) {
|
|
|
|
case 0x09:
|
|
case 0x0a: /* Signalling traffic */
|
|
pseudo_header->atm.aal = AAL_SIGNALLING;
|
|
pseudo_header->atm.type = TRAF_UNKNOWN;
|
|
pseudo_header->atm.subtype = TRAF_ST_UNKNOWN;
|
|
break;
|
|
|
|
case 0x0b: /* ILMI */
|
|
pseudo_header->atm.type = TRAF_ILMI;
|
|
pseudo_header->atm.subtype = TRAF_ST_UNKNOWN;
|
|
break;
|
|
|
|
case 0x0c: /* LANE LE Control */
|
|
pseudo_header->atm.type = TRAF_LANE;
|
|
pseudo_header->atm.subtype = TRAF_ST_LANE_LE_CTRL;
|
|
break;
|
|
|
|
case 0x0d:
|
|
/*
|
|
* 0x0d is *mostly* LANE 802.3,
|
|
* but I've seen an LE Control frame
|
|
* with 0x0d.
|
|
*/
|
|
pseudo_header->atm.type = TRAF_LANE;
|
|
atm_guess_lane_type(pd, len,
|
|
pseudo_header);
|
|
break;
|
|
|
|
case 0x0f: /* LLC multiplexed */
|
|
pseudo_header->atm.type = TRAF_LLCMX; /* XXX */
|
|
pseudo_header->atm.subtype = TRAF_ST_UNKNOWN; /* XXX */
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* XXX - discover the other types.
|
|
*/
|
|
pseudo_header->atm.type = TRAF_UNKNOWN;
|
|
pseudo_header->atm.subtype = TRAF_ST_UNKNOWN;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* 0x60 seen, and dissected by Sniffer
|
|
* Pro as a raw cell.
|
|
*
|
|
* XXX - discover what those types are.
|
|
*/
|
|
pseudo_header->atm.aal = AAL_UNKNOWN;
|
|
pseudo_header->atm.type = TRAF_UNKNOWN;
|
|
pseudo_header->atm.subtype = TRAF_ST_UNKNOWN;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
netxray_read_rec_data(FILE_T fh, guint8 *data_ptr, guint32 packet_size,
|
|
int *err)
|
|
{
|
|
int bytes_read;
|
|
|
|
errno = WTAP_ERR_CANT_READ;
|
|
bytes_read = file_read(data_ptr, 1, packet_size, fh);
|
|
|
|
if (bytes_read <= 0 || (guint32)bytes_read != packet_size) {
|
|
*err = file_error(fh);
|
|
if (*err == 0)
|
|
*err = WTAP_ERR_SHORT_READ;
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
netxray_close(wtap *wth)
|
|
{
|
|
g_free(wth->capture.netxray);
|
|
}
|
|
|
|
static const struct {
|
|
int wtap_encap_value;
|
|
int ndis_value;
|
|
} wtap_encap_1_1[] = {
|
|
{ WTAP_ENCAP_ETHERNET, 0 }, /* -> NDIS Ethernet */
|
|
{ WTAP_ENCAP_TOKEN_RING, 1 }, /* -> NDIS Token Ring */
|
|
{ WTAP_ENCAP_FDDI, 2 }, /* -> NDIS FDDI */
|
|
{ WTAP_ENCAP_FDDI_BITSWAPPED, 2 }, /* -> NDIS FDDI */
|
|
};
|
|
#define NUM_WTAP_ENCAPS_1_1 (sizeof wtap_encap_1_1 / sizeof wtap_encap_1_1[0])
|
|
|
|
static int
|
|
wtap_encap_to_netxray_1_1_encap(int encap)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < NUM_WTAP_ENCAPS_1_1; i++) {
|
|
if (encap == wtap_encap_1_1[i].wtap_encap_value)
|
|
return wtap_encap_1_1[i].ndis_value;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* Returns 0 if we could write the specified encapsulation type,
|
|
an error indication otherwise. */
|
|
int netxray_dump_can_write_encap_1_1(int encap)
|
|
{
|
|
/* Per-packet encapsulations aren't supported. */
|
|
if (encap == WTAP_ENCAP_PER_PACKET)
|
|
return WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED;
|
|
|
|
if (wtap_encap_to_netxray_1_1_encap(encap) == -1)
|
|
return WTAP_ERR_UNSUPPORTED_ENCAP;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Returns TRUE on success, FALSE on failure; sets "*err" to an error code on
|
|
failure */
|
|
gboolean netxray_dump_open_1_1(wtap_dumper *wdh, gboolean cant_seek, int *err)
|
|
{
|
|
/* This is a NetXRay file. We can't fill in some fields in the header
|
|
until all the packets have been written, so we can't write to a
|
|
pipe. */
|
|
if (cant_seek) {
|
|
*err = WTAP_ERR_CANT_WRITE_TO_PIPE;
|
|
return FALSE;
|
|
}
|
|
|
|
wdh->subtype_write = netxray_dump_1_1;
|
|
wdh->subtype_close = netxray_dump_close_1_1;
|
|
|
|
/* We can't fill in all the fields in the file header, as we
|
|
haven't yet written any packets. As we'll have to rewrite
|
|
the header when we've written out all the packets, we just
|
|
skip over the header for now. */
|
|
if (fseek(wdh->fh, CAPTUREFILE_HEADER_SIZE, SEEK_SET) == -1) {
|
|
*err = errno;
|
|
return FALSE;
|
|
}
|
|
|
|
wdh->dump.netxray = g_malloc(sizeof(netxray_dump_t));
|
|
wdh->dump.netxray->first_frame = TRUE;
|
|
wdh->dump.netxray->start.tv_sec = 0;
|
|
wdh->dump.netxray->start.tv_usec = 0;
|
|
wdh->dump.netxray->nframes = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Write a record for a packet to a dump file.
|
|
Returns TRUE on success, FALSE on failure. */
|
|
static gboolean netxray_dump_1_1(wtap_dumper *wdh,
|
|
const struct wtap_pkthdr *phdr,
|
|
const union wtap_pseudo_header *pseudo_header _U_,
|
|
const guchar *pd, int *err)
|
|
{
|
|
netxray_dump_t *netxray = wdh->dump.netxray;
|
|
guint32 timestamp;
|
|
struct netxrayrec_1_x_hdr rec_hdr;
|
|
size_t nwritten;
|
|
|
|
/* NetXRay/Windows Sniffer files have a capture start date/time
|
|
in the header, in a UNIX-style format, with one-second resolution,
|
|
and a start time stamp with microsecond resolution that's just
|
|
an arbitrary time stamp relative to some unknown time (boot
|
|
time?), and have times relative to the start time stamp in
|
|
the packet headers; pick the seconds value of the time stamp
|
|
of the first packet as the UNIX-style start date/time, and make
|
|
the high-resolution start time stamp 0, with the time stamp of
|
|
packets being the delta between the stamp of the packet and
|
|
the stamp of the first packet with the microseconds part 0. */
|
|
if (netxray->first_frame) {
|
|
netxray->first_frame = FALSE;
|
|
netxray->start = phdr->ts;
|
|
}
|
|
|
|
/* build the header for each packet */
|
|
memset(&rec_hdr, '\0', sizeof(rec_hdr));
|
|
timestamp = (phdr->ts.tv_sec - netxray->start.tv_sec)*1000000 +
|
|
phdr->ts.tv_usec;
|
|
rec_hdr.timelo = htolel(timestamp);
|
|
rec_hdr.timehi = htolel(0);
|
|
rec_hdr.orig_len = htoles(phdr->len);
|
|
rec_hdr.incl_len = htoles(phdr->caplen);
|
|
|
|
nwritten = fwrite(&rec_hdr, 1, sizeof(rec_hdr), wdh->fh);
|
|
if (nwritten != sizeof(rec_hdr)) {
|
|
if (nwritten == 0 && ferror(wdh->fh))
|
|
*err = errno;
|
|
else
|
|
*err = WTAP_ERR_SHORT_WRITE;
|
|
return FALSE;
|
|
}
|
|
|
|
/* write the packet data */
|
|
nwritten = fwrite(pd, 1, phdr->caplen, wdh->fh);
|
|
if (nwritten != phdr->caplen) {
|
|
if (nwritten == 0 && ferror(wdh->fh))
|
|
*err = errno;
|
|
else
|
|
*err = WTAP_ERR_SHORT_WRITE;
|
|
return FALSE;
|
|
}
|
|
|
|
netxray->nframes++;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Finish writing to a dump file.
|
|
Returns TRUE on success, FALSE on failure. */
|
|
static gboolean netxray_dump_close_1_1(wtap_dumper *wdh, int *err)
|
|
{
|
|
char hdr_buf[CAPTUREFILE_HEADER_SIZE - sizeof(netxray_magic)];
|
|
netxray_dump_t *netxray = wdh->dump.netxray;
|
|
guint32 filelen;
|
|
struct netxray_hdr file_hdr;
|
|
size_t nwritten;
|
|
|
|
filelen = ftell(wdh->fh);
|
|
|
|
/* Go back to beginning */
|
|
fseek(wdh->fh, 0, SEEK_SET);
|
|
|
|
/* Rewrite the file header. */
|
|
nwritten = fwrite(netxray_magic, 1, sizeof netxray_magic, wdh->fh);
|
|
if (nwritten != sizeof netxray_magic) {
|
|
if (err != NULL) {
|
|
if (nwritten == 0 && ferror(wdh->fh))
|
|
*err = errno;
|
|
else
|
|
*err = WTAP_ERR_SHORT_WRITE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/* "sniffer" version ? */
|
|
memset(&file_hdr, '\0', sizeof file_hdr);
|
|
memcpy(file_hdr.version, vers_1_1, sizeof vers_1_1);
|
|
file_hdr.start_time = htolel(netxray->start.tv_sec);
|
|
file_hdr.nframes = htolel(netxray->nframes);
|
|
file_hdr.start_offset = htolel(CAPTUREFILE_HEADER_SIZE);
|
|
file_hdr.end_offset = htolel(filelen);
|
|
file_hdr.network = htoles(wtap_encap_to_netxray_1_1_encap(wdh->encap));
|
|
file_hdr.timelo = htolel(0);
|
|
file_hdr.timehi = htolel(0);
|
|
|
|
memset(hdr_buf, '\0', sizeof hdr_buf);
|
|
memcpy(hdr_buf, &file_hdr, sizeof(file_hdr));
|
|
nwritten = fwrite(hdr_buf, 1, sizeof hdr_buf, wdh->fh);
|
|
if (nwritten != sizeof hdr_buf) {
|
|
if (err != NULL) {
|
|
if (nwritten == 0 && ferror(wdh->fh))
|
|
*err = errno;
|
|
else
|
|
*err = WTAP_ERR_SHORT_WRITE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static const struct {
|
|
int wtap_encap_value;
|
|
int ndis_value;
|
|
} wtap_encap_2_0[] = {
|
|
{ WTAP_ENCAP_ETHERNET, 0 }, /* -> NDIS Ethernet */
|
|
{ WTAP_ENCAP_TOKEN_RING, 1 }, /* -> NDIS Token Ring */
|
|
{ WTAP_ENCAP_FDDI, 2 }, /* -> NDIS FDDI */
|
|
{ WTAP_ENCAP_FDDI_BITSWAPPED, 2 }, /* -> NDIS FDDI */
|
|
{ WTAP_ENCAP_PPP_WITH_PHDR, 3 }, /* -> NDIS WAN */
|
|
{ WTAP_ENCAP_FRELAY_WITH_PHDR, 3 }, /* -> NDIS WAN */
|
|
{ WTAP_ENCAP_LAPB, 3 }, /* -> NDIS WAN */
|
|
{ WTAP_ENCAP_SDLC, 3 }, /* -> NDIS WAN */
|
|
};
|
|
#define NUM_WTAP_ENCAPS_2_0 (sizeof wtap_encap_2_0 / sizeof wtap_encap_2_0[0])
|
|
|
|
static int
|
|
wtap_encap_to_netxray_2_0_encap(int encap)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < NUM_WTAP_ENCAPS_2_0; i++) {
|
|
if (encap == wtap_encap_2_0[i].wtap_encap_value)
|
|
return wtap_encap_2_0[i].ndis_value;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* Returns 0 if we could write the specified encapsulation type,
|
|
an error indication otherwise. */
|
|
int netxray_dump_can_write_encap_2_0(int encap)
|
|
{
|
|
/* Per-packet encapsulations aren't supported. */
|
|
if (encap == WTAP_ENCAP_PER_PACKET)
|
|
return WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED;
|
|
|
|
if (wtap_encap_to_netxray_2_0_encap(encap) == -1)
|
|
return WTAP_ERR_UNSUPPORTED_ENCAP;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Returns TRUE on success, FALSE on failure; sets "*err" to an error code on
|
|
failure */
|
|
gboolean netxray_dump_open_2_0(wtap_dumper *wdh, gboolean cant_seek, int *err)
|
|
{
|
|
/* This is a NetXRay file. We can't fill in some fields in the header
|
|
until all the packets have been written, so we can't write to a
|
|
pipe. */
|
|
if (cant_seek) {
|
|
*err = WTAP_ERR_CANT_WRITE_TO_PIPE;
|
|
return FALSE;
|
|
}
|
|
|
|
wdh->subtype_write = netxray_dump_2_0;
|
|
wdh->subtype_close = netxray_dump_close_2_0;
|
|
|
|
/* We can't fill in all the fields in the file header, as we
|
|
haven't yet written any packets. As we'll have to rewrite
|
|
the header when we've written out all the packets, we just
|
|
skip over the header for now. */
|
|
if (fseek(wdh->fh, CAPTUREFILE_HEADER_SIZE, SEEK_SET) == -1) {
|
|
*err = errno;
|
|
return FALSE;
|
|
}
|
|
|
|
wdh->dump.netxray = g_malloc(sizeof(netxray_dump_t));
|
|
wdh->dump.netxray->first_frame = TRUE;
|
|
wdh->dump.netxray->start.tv_sec = 0;
|
|
wdh->dump.netxray->start.tv_usec = 0;
|
|
wdh->dump.netxray->nframes = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Write a record for a packet to a dump file.
|
|
Returns TRUE on success, FALSE on failure. */
|
|
static gboolean netxray_dump_2_0(wtap_dumper *wdh,
|
|
const struct wtap_pkthdr *phdr,
|
|
const union wtap_pseudo_header *pseudo_header _U_,
|
|
const guchar *pd, int *err)
|
|
{
|
|
netxray_dump_t *netxray = wdh->dump.netxray;
|
|
guint32 timestamp;
|
|
struct netxrayrec_2_x_hdr rec_hdr;
|
|
size_t nwritten;
|
|
|
|
/* NetXRay/Windows Sniffer files have a capture start date/time
|
|
in the header, in a UNIX-style format, with one-second resolution,
|
|
and a start time stamp with microsecond resolution that's just
|
|
an arbitrary time stamp relative to some unknown time (boot
|
|
time?), and have times relative to the start time stamp in
|
|
the packet headers; pick the seconds value of the time stamp
|
|
of the first packet as the UNIX-style start date/time, and make
|
|
the high-resolution start time stamp 0, with the time stamp of
|
|
packets being the delta between the stamp of the packet and
|
|
the stamp of the first packet with the microseconds part 0. */
|
|
if (netxray->first_frame) {
|
|
netxray->first_frame = FALSE;
|
|
netxray->start = phdr->ts;
|
|
}
|
|
|
|
/* build the header for each packet */
|
|
memset(&rec_hdr, '\0', sizeof(rec_hdr));
|
|
timestamp = (phdr->ts.tv_sec - netxray->start.tv_sec)*1000000 +
|
|
phdr->ts.tv_usec;
|
|
rec_hdr.timelo = htolel(timestamp);
|
|
rec_hdr.timehi = htolel(0);
|
|
rec_hdr.orig_len = htoles(phdr->len);
|
|
rec_hdr.incl_len = htoles(phdr->caplen);
|
|
|
|
switch (phdr->pkt_encap) {
|
|
|
|
case WTAP_ENCAP_IEEE_802_11_WITH_RADIO:
|
|
rec_hdr.xxx[12] = pseudo_header->ieee_802_11.channel;
|
|
rec_hdr.xxx[13] = pseudo_header->ieee_802_11.data_rate;
|
|
rec_hdr.xxx[14] = pseudo_header->ieee_802_11.signal_level;
|
|
break;
|
|
|
|
case WTAP_ENCAP_PPP_WITH_PHDR:
|
|
case WTAP_ENCAP_SDLC:
|
|
rec_hdr.xxx[12] |= pseudo_header->p2p.sent ? 0x01 : 0x00;
|
|
break;
|
|
|
|
case WTAP_ENCAP_FRELAY_WITH_PHDR:
|
|
rec_hdr.xxx[12] |= (pseudo_header->x25.flags & FROM_DCE) ? 0x00 : 0x01;
|
|
break;
|
|
}
|
|
|
|
nwritten = fwrite(&rec_hdr, 1, sizeof(rec_hdr), wdh->fh);
|
|
if (nwritten != sizeof(rec_hdr)) {
|
|
if (nwritten == 0 && ferror(wdh->fh))
|
|
*err = errno;
|
|
else
|
|
*err = WTAP_ERR_SHORT_WRITE;
|
|
return FALSE;
|
|
}
|
|
|
|
/* write the packet data */
|
|
nwritten = fwrite(pd, 1, phdr->caplen, wdh->fh);
|
|
if (nwritten != phdr->caplen) {
|
|
if (nwritten == 0 && ferror(wdh->fh))
|
|
*err = errno;
|
|
else
|
|
*err = WTAP_ERR_SHORT_WRITE;
|
|
return FALSE;
|
|
}
|
|
|
|
netxray->nframes++;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Finish writing to a dump file.
|
|
Returns TRUE on success, FALSE on failure. */
|
|
static gboolean netxray_dump_close_2_0(wtap_dumper *wdh, int *err)
|
|
{
|
|
char hdr_buf[CAPTUREFILE_HEADER_SIZE - sizeof(netxray_magic)];
|
|
netxray_dump_t *netxray = wdh->dump.netxray;
|
|
guint32 filelen;
|
|
struct netxray_hdr file_hdr;
|
|
size_t nwritten;
|
|
|
|
filelen = ftell(wdh->fh);
|
|
|
|
/* Go back to beginning */
|
|
fseek(wdh->fh, 0, SEEK_SET);
|
|
|
|
/* Rewrite the file header. */
|
|
nwritten = fwrite(netxray_magic, 1, sizeof netxray_magic, wdh->fh);
|
|
if (nwritten != sizeof netxray_magic) {
|
|
if (err != NULL) {
|
|
if (nwritten == 0 && ferror(wdh->fh))
|
|
*err = errno;
|
|
else
|
|
*err = WTAP_ERR_SHORT_WRITE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/* "sniffer" version ? */
|
|
memset(&file_hdr, '\0', sizeof file_hdr);
|
|
memcpy(file_hdr.version, vers_2_001, sizeof vers_2_001);
|
|
file_hdr.start_time = htolel(netxray->start.tv_sec);
|
|
file_hdr.nframes = htolel(netxray->nframes);
|
|
file_hdr.start_offset = htolel(CAPTUREFILE_HEADER_SIZE);
|
|
file_hdr.end_offset = htolel(filelen);
|
|
file_hdr.network = htoles(wtap_encap_to_netxray_2_0_encap(wdh->encap));
|
|
file_hdr.timelo = htolel(0);
|
|
file_hdr.timehi = htolel(0);
|
|
switch (wdh->encap) {
|
|
|
|
case WTAP_ENCAP_PPP_WITH_PHDR:
|
|
file_hdr.xxb[20] = CAPTYPE_PPP;
|
|
break;
|
|
|
|
case WTAP_ENCAP_FRELAY_WITH_PHDR:
|
|
file_hdr.xxb[20] = CAPTYPE_FRELAY;
|
|
break;
|
|
|
|
case WTAP_ENCAP_LAPB:
|
|
file_hdr.xxb[20] = CAPTYPE_HDLC;
|
|
file_hdr.xxb[28] = 0;
|
|
break;
|
|
|
|
case WTAP_ENCAP_SDLC:
|
|
file_hdr.xxb[20] = CAPTYPE_SDLC;
|
|
break;
|
|
}
|
|
|
|
memset(hdr_buf, '\0', sizeof hdr_buf);
|
|
memcpy(hdr_buf, &file_hdr, sizeof(file_hdr));
|
|
nwritten = fwrite(hdr_buf, 1, sizeof hdr_buf, wdh->fh);
|
|
if (nwritten != sizeof hdr_buf) {
|
|
if (err != NULL) {
|
|
if (nwritten == 0 && ferror(wdh->fh))
|
|
*err = errno;
|
|
else
|
|
*err = WTAP_ERR_SHORT_WRITE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|