1402 lines
46 KiB
C
1402 lines
46 KiB
C
/* commview.c
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* Routines for opening CommView NCF and NCFX file format packet captures
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* Copyright 2007, Stephen Fisher (see AUTHORS file)
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Based on csids.c and nettl.c
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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/* A brief description of these file formats is available at:
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* https://www.tamos.com/htmlhelp/commview/logformat.htm
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* https://www.tamos.com/htmlhelp/commwifi/logformat.htm
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*
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* Use
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*
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* https://web.archive.org/web/20171022225753/http://www.tamos.com/htmlhelp/commview/logformat.htm
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*
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* if that doesn't display anything.
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*/
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#include "config.h"
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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 "commview.h"
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#include <wsutil/802_11-utils.h>
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/*
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* Capture medium types used in NCF and NCFX;
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* Token Ring isn't used in NCFX.
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*/
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#define MEDIUM_ETHERNET 0
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#define MEDIUM_WIFI 1
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#define MEDIUM_TOKEN_RING 2
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typedef struct commview_ncf_header {
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guint16 data_len;
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guint16 source_data_len;
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guint8 version;
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guint16 year;
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guint8 month;
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guint8 day;
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guint8 hours;
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guint8 minutes;
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guint8 seconds;
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guint32 usecs;
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guint8 flags; /* Bit-field positions defined below */
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guint8 signal_level_percent;
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guint8 rate;
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guint8 band;
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guint8 channel;
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guint8 direction; /* Or for WiFi, high order byte of
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* packet rate. */
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gint8 signal_level_dbm; /* WiFi-only */
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gint8 noise_level_dbm; /* WiFi-only */
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} commview_ncf_header_t;
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#define COMMVIEW_NCF_HEADER_SIZE 24
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/* Bit-field positions for various fields in the flags variable of the header */
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#define FLAGS_MEDIUM 0x0F
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#define FLAGS_DECRYPTED 0x10
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#define FLAGS_BROKEN 0x20
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#define FLAGS_COMPRESSED 0x40
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#define FLAGS_RESERVED 0x80
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/* Values for the band variable of the header */
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#define BAND_11A 0x01
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#define BAND_11B 0x02
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#define BAND_11G 0x04
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#define BAND_11A_TURBO 0x08
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#define BAND_SUPERG 0x10
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#define BAND_PUBLIC_SAFETY 0x20 /* 4.99 GHz public safety */
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#define BAND_11N_5GHZ 0x40
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#define BAND_11N_2_4GHZ 0x80
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static gboolean commview_ncf_read(wtap *wth, wtap_rec *rec, Buffer *buf,
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int *err, gchar **err_info, gint64 *data_offset);
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static gboolean commview_ncf_seek_read(wtap *wth, gint64 seek_off,
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wtap_rec *rec,
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Buffer *buf, int *err, gchar **err_info);
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static gboolean commview_ncf_read_header(commview_ncf_header_t *cv_hdr, FILE_T fh,
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int *err, gchar **err_info);
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static gboolean commview_ncf_dump(wtap_dumper *wdh, const wtap_rec *rec,
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const guint8 *pd, int *err, gchar **err_info);
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static int commview_ncf_file_type_subtype = -1;
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static int commview_ncfx_file_type_subtype = -1;
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void register_commview(void);
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wtap_open_return_val
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commview_ncf_open(wtap *wth, int *err, gchar **err_info)
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{
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commview_ncf_header_t cv_hdr;
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if(!commview_ncf_read_header(&cv_hdr, wth->fh, err, err_info)) {
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if (*err != 0 && *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 any of these fields do not match what we expect, bail out. */
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if(cv_hdr.version != 0 ||
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cv_hdr.year < 1970 || cv_hdr.year >= 2038 ||
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cv_hdr.month < 1 || cv_hdr.month > 12 ||
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cv_hdr.day < 1 || cv_hdr.day > 31 ||
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cv_hdr.hours > 23 ||
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cv_hdr.minutes > 59 ||
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cv_hdr.seconds > 60 ||
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cv_hdr.signal_level_percent > 100 ||
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(cv_hdr.flags & FLAGS_RESERVED) != 0 ||
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((cv_hdr.flags & FLAGS_MEDIUM) != MEDIUM_ETHERNET &&
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(cv_hdr.flags & FLAGS_MEDIUM) != MEDIUM_WIFI &&
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(cv_hdr.flags & FLAGS_MEDIUM) != MEDIUM_TOKEN_RING))
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return WTAP_OPEN_NOT_MINE; /* Not our kind of file */
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/* No file header. Reset the fh to 0 so we can read the first packet */
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if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
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return WTAP_OPEN_ERROR;
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/* Set up the pointers to the handlers for this file type */
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wth->subtype_read = commview_ncf_read;
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wth->subtype_seek_read = commview_ncf_seek_read;
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wth->file_type_subtype = commview_ncf_file_type_subtype;
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wth->file_encap = WTAP_ENCAP_PER_PACKET;
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wth->file_tsprec = WTAP_TSPREC_USEC;
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return WTAP_OPEN_MINE; /* Our kind of file */
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}
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static int
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commview_ncf_read_packet(FILE_T fh, wtap_rec *rec, Buffer *buf,
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int *err, gchar **err_info)
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{
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commview_ncf_header_t cv_hdr;
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struct tm tm;
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guint frequency;
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if(!commview_ncf_read_header(&cv_hdr, fh, err, err_info))
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return FALSE;
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/*
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* The maximum value of cv_hdr.data_len is 65535, which is less
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* than WTAP_MAX_PACKET_SIZE_STANDARD will ever be, so we don't need to
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* check it.
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*/
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switch(cv_hdr.flags & FLAGS_MEDIUM) {
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case MEDIUM_ETHERNET :
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rec->rec_header.packet_header.pkt_encap = WTAP_ENCAP_ETHERNET;
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rec->rec_header.packet_header.pseudo_header.eth.fcs_len = -1; /* Unknown */
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break;
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case MEDIUM_WIFI :
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rec->rec_header.packet_header.pkt_encap = 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 = -1; /* Unknown */
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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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switch (cv_hdr.band) {
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case BAND_11A:
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11A;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11a.has_channel_type = FALSE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11a.has_turbo_type = TRUE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11a.turbo_type =
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PHDR_802_11A_TURBO_TYPE_NORMAL;
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frequency = ieee80211_chan_to_mhz(cv_hdr.channel, FALSE);
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break;
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case BAND_11B:
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11B;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11b.has_short_preamble = FALSE;
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frequency = ieee80211_chan_to_mhz(cv_hdr.channel, TRUE);
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break;
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case BAND_11G:
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11G;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11g.has_mode = TRUE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11g.mode =
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PHDR_802_11G_MODE_NORMAL;
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frequency = ieee80211_chan_to_mhz(cv_hdr.channel, TRUE);
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break;
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case BAND_11A_TURBO:
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11A;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11a.has_turbo_type = TRUE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11a.turbo_type =
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PHDR_802_11A_TURBO_TYPE_TURBO;
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frequency = ieee80211_chan_to_mhz(cv_hdr.channel, FALSE);
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break;
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case BAND_SUPERG:
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11G;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11g.has_mode = TRUE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11g.mode =
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PHDR_802_11G_MODE_SUPER_G;
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frequency = ieee80211_chan_to_mhz(cv_hdr.channel, TRUE);
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break;
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case BAND_11N_5GHZ:
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11N;
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frequency = ieee80211_chan_to_mhz(cv_hdr.channel, FALSE);
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break;
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case BAND_11N_2_4GHZ:
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11N;
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frequency = ieee80211_chan_to_mhz(cv_hdr.channel, TRUE);
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break;
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case BAND_PUBLIC_SAFETY:
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/*
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* XXX - what do we do here? What are the channel
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* numbers? How do we distinguish the several
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* different flavors of 4.9 GHz frequencies?
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*/
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frequency = 0;
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break;
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default:
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frequency = 0;
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break;
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}
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if (frequency != 0) {
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_frequency = TRUE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.frequency = frequency;
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}
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_channel = TRUE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.channel = cv_hdr.channel;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_data_rate = TRUE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.data_rate =
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cv_hdr.rate | (cv_hdr.direction << 8);
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_signal_percent = TRUE;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.signal_percent = cv_hdr.signal_level_percent;
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/*
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* XXX - these are positive in captures I've seen; does
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* that mean that they are the negative of the actual
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* dBm value? (80 dBm is a bit more power than most
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* countries' regulatory agencies are likely to allow
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* any individual to have in their home. :-))
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*
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* XXX - sometimes these are 0; assume that means that no
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* value is provided.
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*/
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if (cv_hdr.signal_level_dbm != 0) {
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.signal_dbm = -cv_hdr.signal_level_dbm;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_signal_dbm = TRUE;
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}
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if (cv_hdr.noise_level_dbm != 0) {
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.noise_dbm = -cv_hdr.noise_level_dbm;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_noise_dbm = TRUE;
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}
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if (rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy == PHDR_802_11_PHY_UNKNOWN) {
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/*
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* We don't know they PHY, but we do have the
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* data rate; try to guess it based on the
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* data rate and center frequency.
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*/
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if (RATE_IS_DSSS(rec->rec_header.packet_header.pseudo_header.ieee_802_11.data_rate)) {
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/* 11b */
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11B;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11b.has_short_preamble = FALSE;
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} else if (RATE_IS_OFDM(rec->rec_header.packet_header.pseudo_header.ieee_802_11.data_rate)) {
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/* 11a or 11g, depending on the band. */
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if (rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_frequency) {
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if (FREQ_IS_BG(rec->rec_header.packet_header.pseudo_header.ieee_802_11.frequency)) {
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/* 11g */
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11G;
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} else {
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/* 11a */
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11A;
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}
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}
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}
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} else if (rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy == PHDR_802_11_PHY_11G) {
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if (RATE_IS_DSSS(rec->rec_header.packet_header.pseudo_header.ieee_802_11.data_rate)) {
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/* DSSS, so 11b. */
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11B;
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rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11b.has_short_preamble = FALSE;
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}
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}
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break;
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case MEDIUM_TOKEN_RING :
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rec->rec_header.packet_header.pkt_encap = WTAP_ENCAP_TOKEN_RING;
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break;
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default :
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*err = WTAP_ERR_BAD_FILE;
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*err_info = g_strdup_printf("commview: unsupported encap for NCF: %u",
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cv_hdr.flags & FLAGS_MEDIUM);
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return FALSE;
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}
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tm.tm_year = cv_hdr.year - 1900;
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tm.tm_mon = cv_hdr.month - 1;
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tm.tm_mday = cv_hdr.day;
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tm.tm_hour = cv_hdr.hours;
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tm.tm_min = cv_hdr.minutes;
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tm.tm_sec = cv_hdr.seconds;
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tm.tm_isdst = -1;
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rec->rec_type = REC_TYPE_PACKET;
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rec->block = wtap_block_create(WTAP_BLOCK_PACKET);
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rec->presence_flags = WTAP_HAS_TS;
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rec->rec_header.packet_header.len = cv_hdr.data_len;
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rec->rec_header.packet_header.caplen = cv_hdr.data_len;
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rec->ts.secs = mktime(&tm);
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rec->ts.nsecs = cv_hdr.usecs * 1000;
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return wtap_read_packet_bytes(fh, buf, rec->rec_header.packet_header.caplen, err, err_info);
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}
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static gboolean
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commview_ncf_read(wtap *wth, wtap_rec *rec, Buffer *buf, int *err,
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gchar **err_info, gint64 *data_offset)
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{
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*data_offset = file_tell(wth->fh);
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return commview_ncf_read_packet(wth->fh, rec, buf, err, err_info);
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}
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static gboolean
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commview_ncf_seek_read(wtap *wth, gint64 seek_off, wtap_rec *rec,
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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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return commview_ncf_read_packet(wth->random_fh, rec, buf, err, err_info);
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}
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static gboolean
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commview_ncf_read_header(commview_ncf_header_t *cv_hdr, FILE_T fh, int *err,
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gchar **err_info)
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{
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if (!wtap_read_bytes_or_eof(fh, &cv_hdr->data_len, 2, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->source_data_len, 2, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->version, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->year, 2, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->month, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->day, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->hours, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->minutes, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->seconds, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->usecs, 4, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->flags, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->signal_level_percent, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->rate, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->band, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->channel, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->direction, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->signal_level_dbm, 1, err, err_info))
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return FALSE;
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if (!wtap_read_bytes(fh, &cv_hdr->noise_level_dbm, 1, err, err_info))
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return FALSE;
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/* Convert multi-byte values from little endian to host endian format */
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cv_hdr->data_len = GUINT16_FROM_LE(cv_hdr->data_len);
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cv_hdr->source_data_len = GUINT16_FROM_LE(cv_hdr->source_data_len);
|
|
cv_hdr->year = GUINT16_FROM_LE(cv_hdr->year);
|
|
cv_hdr->usecs = GUINT32_FROM_LE(cv_hdr->usecs);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Returns 0 if we can write out the specified encapsulation type
|
|
* into a CommView format file. */
|
|
static int
|
|
commview_ncf_dump_can_write_encap(int encap)
|
|
{
|
|
switch (encap) {
|
|
|
|
case WTAP_ENCAP_ETHERNET :
|
|
case WTAP_ENCAP_IEEE_802_11 :
|
|
case WTAP_ENCAP_IEEE_802_11_WITH_RADIO :
|
|
case WTAP_ENCAP_TOKEN_RING :
|
|
case WTAP_ENCAP_PER_PACKET :
|
|
return 0;
|
|
|
|
default:
|
|
return WTAP_ERR_UNWRITABLE_ENCAP;
|
|
}
|
|
}
|
|
|
|
/* Returns TRUE on success, FALSE on failure;
|
|
sets "*err" to an error code on failure */
|
|
static gboolean
|
|
commview_ncf_dump_open(wtap_dumper *wdh, int *err _U_, gchar **err_info _U_)
|
|
{
|
|
wdh->subtype_write = commview_ncf_dump;
|
|
|
|
/* There is no file header to write out */
|
|
wdh->bytes_dumped = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Write a record for a packet to a dump file.
|
|
* Returns TRUE on success, FALSE on failure. */
|
|
static gboolean
|
|
commview_ncf_dump(wtap_dumper *wdh, const wtap_rec *rec, const guint8 *pd,
|
|
int *err, gchar **err_info _U_)
|
|
{
|
|
commview_ncf_header_t cv_hdr = {0};
|
|
struct tm *tm;
|
|
|
|
/* We can only write packet records. */
|
|
if (rec->rec_type != REC_TYPE_PACKET) {
|
|
*err = WTAP_ERR_UNWRITABLE_REC_TYPE;
|
|
return FALSE;
|
|
}
|
|
|
|
/* Don't write out anything bigger than we can read.
|
|
* (The length field in packet headers is 16 bits, which
|
|
* imposes a hard limit.) */
|
|
if (rec->rec_header.packet_header.caplen > 65535) {
|
|
*err = WTAP_ERR_PACKET_TOO_LARGE;
|
|
return FALSE;
|
|
}
|
|
|
|
cv_hdr.data_len = GUINT16_TO_LE((guint16)rec->rec_header.packet_header.caplen);
|
|
cv_hdr.source_data_len = GUINT16_TO_LE((guint16)rec->rec_header.packet_header.caplen);
|
|
cv_hdr.version = 0;
|
|
|
|
tm = localtime(&rec->ts.secs);
|
|
if (tm != NULL) {
|
|
cv_hdr.year = GUINT16_TO_LE(tm->tm_year + 1900);
|
|
cv_hdr.month = tm->tm_mon + 1;
|
|
cv_hdr.day = tm->tm_mday;
|
|
cv_hdr.hours = tm->tm_hour;
|
|
cv_hdr.minutes = tm->tm_min;
|
|
cv_hdr.seconds = tm->tm_sec;
|
|
cv_hdr.usecs = GUINT32_TO_LE(rec->ts.nsecs / 1000);
|
|
} else {
|
|
/*
|
|
* Second before the Epoch.
|
|
*/
|
|
cv_hdr.year = GUINT16_TO_LE(1969);
|
|
cv_hdr.month = 12;
|
|
cv_hdr.day = 31;
|
|
cv_hdr.hours = 23;
|
|
cv_hdr.minutes = 59;
|
|
cv_hdr.seconds = 59;
|
|
cv_hdr.usecs = 0;
|
|
}
|
|
|
|
switch(rec->rec_header.packet_header.pkt_encap) {
|
|
|
|
case WTAP_ENCAP_ETHERNET :
|
|
cv_hdr.flags |= MEDIUM_ETHERNET;
|
|
break;
|
|
|
|
case WTAP_ENCAP_IEEE_802_11 :
|
|
cv_hdr.flags |= MEDIUM_WIFI;
|
|
break;
|
|
|
|
case WTAP_ENCAP_IEEE_802_11_WITH_RADIO :
|
|
cv_hdr.flags |= MEDIUM_WIFI;
|
|
|
|
switch (rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy) {
|
|
|
|
case PHDR_802_11_PHY_11A:
|
|
/*
|
|
* If we don't know whether it's turbo, say it's
|
|
* not.
|
|
*/
|
|
if (!rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11a.has_turbo_type ||
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11a.turbo_type == PHDR_802_11A_TURBO_TYPE_NORMAL)
|
|
cv_hdr.band = BAND_11A;
|
|
else
|
|
cv_hdr.band = BAND_11A_TURBO;
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11B:
|
|
cv_hdr.band = BAND_11B;
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11G:
|
|
/*
|
|
* If we don't know whether it's Super G, say it's
|
|
* not.
|
|
*/
|
|
if (!rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11g.has_mode)
|
|
cv_hdr.band = BAND_11G;
|
|
else {
|
|
switch (rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11g.mode) {
|
|
|
|
case PHDR_802_11G_MODE_NORMAL:
|
|
cv_hdr.band = BAND_11G;
|
|
break;
|
|
|
|
case PHDR_802_11G_MODE_SUPER_G:
|
|
cv_hdr.band = BAND_SUPERG;
|
|
break;
|
|
|
|
default:
|
|
cv_hdr.band = BAND_11G;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11N:
|
|
/*
|
|
* Pick the band based on the frequency.
|
|
*/
|
|
if (rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_frequency) {
|
|
if (rec->rec_header.packet_header.pseudo_header.ieee_802_11.frequency > 2484) {
|
|
/* 5 GHz band */
|
|
cv_hdr.band = BAND_11N_5GHZ;
|
|
} else {
|
|
/* 2.4 GHz band */
|
|
cv_hdr.band = BAND_11N_2_4GHZ;
|
|
}
|
|
} else {
|
|
/* Band is unknown. */
|
|
cv_hdr.band = 0;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* It's not documented how they handle 11ac,
|
|
* and they don't support the older PHYs.
|
|
*/
|
|
cv_hdr.band = 0;
|
|
break;
|
|
}
|
|
cv_hdr.channel =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_channel ?
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.channel :
|
|
0;
|
|
cv_hdr.rate =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_data_rate ?
|
|
(guint8)(rec->rec_header.packet_header.pseudo_header.ieee_802_11.data_rate & 0xFF) :
|
|
0;
|
|
cv_hdr.direction =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_data_rate ?
|
|
(guint8)((rec->rec_header.packet_header.pseudo_header.ieee_802_11.data_rate >> 8) & 0xFF) :
|
|
0;
|
|
cv_hdr.signal_level_percent =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_signal_percent ?
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.signal_percent :
|
|
0;
|
|
cv_hdr.signal_level_dbm =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_signal_dbm ?
|
|
-rec->rec_header.packet_header.pseudo_header.ieee_802_11.signal_dbm :
|
|
0;
|
|
cv_hdr.noise_level_dbm =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_noise_dbm ?
|
|
-rec->rec_header.packet_header.pseudo_header.ieee_802_11.noise_dbm :
|
|
0;
|
|
break;
|
|
|
|
case WTAP_ENCAP_TOKEN_RING :
|
|
cv_hdr.flags |= MEDIUM_TOKEN_RING;
|
|
break;
|
|
|
|
default :
|
|
*err = WTAP_ERR_UNWRITABLE_ENCAP;
|
|
return FALSE;
|
|
}
|
|
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.data_len, 2, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.source_data_len, 2, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.version, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.year, 2, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.month, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.day, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.hours, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.minutes, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.seconds, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.usecs, 4, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.flags, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.signal_level_percent, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.rate, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.band, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.channel, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.direction, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.signal_level_dbm, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.noise_level_dbm, 1, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += COMMVIEW_NCF_HEADER_SIZE;
|
|
|
|
if (!wtap_dump_file_write(wdh, pd, rec->rec_header.packet_header.caplen, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += rec->rec_header.packet_header.caplen;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
typedef struct commview_ncfx_header {
|
|
guint32 data_len;
|
|
guint16 year;
|
|
guint8 month;
|
|
guint8 day;
|
|
guint8 hours;
|
|
guint8 minutes;
|
|
guint8 seconds;
|
|
guint32 usecs;
|
|
guint8 medium_type;
|
|
guint8 decryption_flag;
|
|
guint8 direction;
|
|
guint8 reserved1;
|
|
guint8 reserved2;
|
|
} commview_ncfx_header_t;
|
|
|
|
#define COMMVIEW_NCFX_HEADER_SIZE 20
|
|
|
|
typedef struct commview_ncfx_rf_header {
|
|
guint16 header_len; /* includes extension headers */
|
|
guint16 status_modulation;
|
|
guint16 frequency_band;
|
|
guint16 channel;
|
|
guint8 noise_level_dbm; /* abs(noise in dBm) */
|
|
guint8 signal_level_dbm; /* abs(signal in dBm) */
|
|
guint8 signal_level_percent;
|
|
guint8 reserved;
|
|
guint32 phy_rate; /* in 100Kbps units */
|
|
guint32 extensions_present;
|
|
} commview_ncfx_rf_header_t;
|
|
|
|
#define COMMVIEW_NCFX_RF_HEADER_SIZE 20
|
|
|
|
typedef struct commview_ncfx_mcs_header {
|
|
guint8 mcs_index;
|
|
guint8 n_streams;
|
|
guint8 channel_width;
|
|
guint8 guard_interval;
|
|
} commview_ncfx_mcs_header_t;
|
|
|
|
#define COMMVIEW_NCFX_MCS_HEADER_SIZE 4
|
|
|
|
/*
|
|
* Bit-field positions for various fields in the status_modulation variable
|
|
* of the header.
|
|
*/
|
|
#define STATUS_MODULATION_BAD_FCS 0x01
|
|
#define STATUS_MODULATION_HT_PHY 0x02
|
|
#define STATUS_MODULATION_VHT_PHY 0x04
|
|
#define STATUS_MODULATION_HE_PHY 0x08
|
|
#define STATUS_MODULATION_HE_OFDMA 0x10
|
|
|
|
/* Values for the frequency_band variable of the header */
|
|
#define BAND_5GHZ 0x40
|
|
#define BAND_2_4GHZ 0x80
|
|
|
|
/* Presence bits */
|
|
#define PRESENCE_MCS_HEADER 0x00000001 /* type 0, bit 0 */
|
|
|
|
static gboolean commview_ncfx_read(wtap *wth, wtap_rec *rec, Buffer *buf,
|
|
int *err, gchar **err_info, gint64 *data_offset);
|
|
static gboolean commview_ncfx_seek_read(wtap *wth, gint64 seek_off,
|
|
wtap_rec *rec, Buffer *buf, int *err, gchar **err_info);
|
|
static gboolean commview_ncfx_read_header(commview_ncfx_header_t *cv_hdr,
|
|
FILE_T fh, int *err, gchar **err_info);
|
|
static gboolean commview_ncfx_read_rf_header(commview_ncfx_rf_header_t *cv_rf_hdr,
|
|
FILE_T fh, int *err, gchar **err_info);
|
|
static gboolean commview_ncfx_read_mcs_header(commview_ncfx_mcs_header_t *cv_mcs_hdr,
|
|
FILE_T fh, int *err, gchar **err_info);
|
|
static gboolean commview_ncfx_dump(wtap_dumper *wdh, const wtap_rec *rec,
|
|
const guint8 *pd, int *err, gchar **err_info);
|
|
|
|
wtap_open_return_val
|
|
commview_ncfx_open(wtap *wth, int *err, gchar **err_info)
|
|
{
|
|
commview_ncfx_header_t cv_hdr;
|
|
|
|
if(!commview_ncfx_read_header(&cv_hdr, wth->fh, err, err_info)) {
|
|
if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
|
|
return WTAP_OPEN_ERROR;
|
|
return WTAP_OPEN_NOT_MINE;
|
|
}
|
|
|
|
/* If any of these fields do not match what we expect, bail out. */
|
|
if(cv_hdr.year < 2000 || /* XXX - when was this format introduced? */
|
|
cv_hdr.month < 1 || cv_hdr.month > 12 ||
|
|
cv_hdr.day < 1 || cv_hdr.day > 31 ||
|
|
cv_hdr.hours > 23 ||
|
|
cv_hdr.minutes > 59 ||
|
|
cv_hdr.seconds > 60)
|
|
return WTAP_OPEN_NOT_MINE; /* Not our kind of file */
|
|
switch (cv_hdr.medium_type) {
|
|
|
|
case MEDIUM_ETHERNET:
|
|
if (cv_hdr.direction != 0x00 &&
|
|
cv_hdr.direction != 0x01 &&
|
|
cv_hdr.direction != 0x02)
|
|
return WTAP_OPEN_NOT_MINE; /* Not our kind of file */
|
|
break;
|
|
|
|
case MEDIUM_WIFI:
|
|
if (cv_hdr.decryption_flag != 0x00 &&
|
|
cv_hdr.decryption_flag != 0x01)
|
|
return WTAP_OPEN_NOT_MINE; /* Not our kind of file */
|
|
if (cv_hdr.direction != 0x00)
|
|
return WTAP_OPEN_NOT_MINE; /* Not our kind of file */
|
|
break;
|
|
|
|
default:
|
|
return WTAP_OPEN_NOT_MINE; /* Not our kind of file */
|
|
}
|
|
|
|
/* No file header. Reset the fh to 0 so we can read the first packet */
|
|
if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
|
|
return WTAP_OPEN_ERROR;
|
|
|
|
/* Set up the pointers to the handlers for this file type */
|
|
wth->subtype_read = commview_ncfx_read;
|
|
wth->subtype_seek_read = commview_ncfx_seek_read;
|
|
|
|
wth->file_type_subtype = commview_ncfx_file_type_subtype;
|
|
wth->file_encap = WTAP_ENCAP_PER_PACKET;
|
|
wth->file_tsprec = WTAP_TSPREC_USEC;
|
|
|
|
return WTAP_OPEN_MINE; /* Our kind of file */
|
|
}
|
|
|
|
static int
|
|
commview_ncfx_read_packet(FILE_T fh, wtap_rec *rec, Buffer *buf,
|
|
int *err, gchar **err_info)
|
|
{
|
|
commview_ncfx_header_t cv_hdr;
|
|
guint32 length_remaining;
|
|
struct tm tm;
|
|
commview_ncfx_rf_header_t cv_rf_hdr;
|
|
guint frequency;
|
|
commview_ncfx_mcs_header_t cv_mcs_hdr;
|
|
|
|
if (!commview_ncfx_read_header(&cv_hdr, fh, err, err_info))
|
|
return FALSE;
|
|
|
|
/* Amount of data remaining in the record, after the header */
|
|
length_remaining = cv_hdr.data_len - COMMVIEW_NCFX_HEADER_SIZE;
|
|
|
|
switch(cv_hdr.medium_type) {
|
|
|
|
case MEDIUM_ETHERNET :
|
|
rec->rec_header.packet_header.pkt_encap = WTAP_ENCAP_ETHERNET;
|
|
rec->rec_header.packet_header.pseudo_header.eth.fcs_len = -1; /* Unknown */
|
|
break;
|
|
|
|
case MEDIUM_WIFI :
|
|
rec->rec_header.packet_header.pkt_encap = WTAP_ENCAP_IEEE_802_11_WITH_RADIO;
|
|
memset(&rec->rec_header.packet_header.pseudo_header.ieee_802_11, 0, sizeof(rec->rec_header.packet_header.pseudo_header.ieee_802_11));
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.fcs_len = 0; /* No FCS */
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.decrypted = (cv_hdr.decryption_flag == 0x01);
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.datapad = FALSE;
|
|
|
|
/*
|
|
* Make sure we have enough data left for the RF header.
|
|
*/
|
|
if (length_remaining < COMMVIEW_NCFX_RF_HEADER_SIZE) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("commview: RF header goes past the NCFX data length %u",
|
|
cv_hdr.data_len);
|
|
return FALSE;
|
|
}
|
|
length_remaining -= COMMVIEW_NCFX_RF_HEADER_SIZE;
|
|
|
|
/*
|
|
* Read the RF header.
|
|
*/
|
|
if (!commview_ncfx_read_rf_header(&cv_rf_hdr, fh, err, err_info))
|
|
return FALSE;
|
|
if (cv_rf_hdr.status_modulation & STATUS_MODULATION_HE_PHY)
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11AX;
|
|
else if (cv_rf_hdr.status_modulation & STATUS_MODULATION_VHT_PHY)
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11AC;
|
|
else if (cv_rf_hdr.status_modulation & STATUS_MODULATION_HT_PHY)
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11N;
|
|
else {
|
|
/*
|
|
* Unknown PHY, for now.
|
|
*/
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_UNKNOWN;
|
|
}
|
|
switch (cv_rf_hdr.frequency_band) {
|
|
|
|
case BAND_5GHZ:
|
|
frequency = ieee80211_chan_to_mhz(cv_rf_hdr.channel, FALSE);
|
|
if (rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy == PHDR_802_11_PHY_UNKNOWN) {
|
|
/*
|
|
* None of the modulation bits were set, so
|
|
* this is presumably the 11a OFDM PHY.
|
|
*/
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11A;
|
|
}
|
|
break;
|
|
|
|
case BAND_2_4GHZ:
|
|
frequency = ieee80211_chan_to_mhz(cv_rf_hdr.channel, TRUE);
|
|
if (rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy == PHDR_802_11_PHY_UNKNOWN) {
|
|
/*
|
|
* None of the modulation bits were set, so
|
|
* guess the PHY based on the data rate.
|
|
*
|
|
* cv_rf_hdr.phy_rate is in units of 100
|
|
* Kbits/s.
|
|
*/
|
|
if (cv_rf_hdr.phy_rate == 10 /* 1 Mb/s */ ||
|
|
cv_rf_hdr.phy_rate == 20 /* 2 Mb/s */ ||
|
|
cv_rf_hdr.phy_rate == 55 /* 5.5 Mb/s */ ||
|
|
cv_rf_hdr.phy_rate == 110 /* 11 Mb/s */ ||
|
|
cv_rf_hdr.phy_rate == 220 /* 22 Mb/s */ ||
|
|
cv_rf_hdr.phy_rate == 330 /* 33 Mb/s */)
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11B;
|
|
else
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11G;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
frequency = 0;
|
|
break;
|
|
}
|
|
if (frequency != 0) {
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_frequency = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.frequency = frequency;
|
|
}
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_channel = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.channel = cv_rf_hdr.channel;
|
|
|
|
/*
|
|
* cv_rf_hdr.phy_rate is in units of 100 Kbits/s.
|
|
*
|
|
* pseudo_header.ieee_802_11.data_rate is in units of 500
|
|
* Kbits/s.
|
|
*/
|
|
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 =
|
|
cv_rf_hdr.phy_rate/5;
|
|
|
|
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 = cv_rf_hdr.signal_level_percent;
|
|
|
|
/*
|
|
* These is the absolute value of the signal and noise,
|
|
* in dBm. The value is the negative of that.
|
|
*
|
|
* XXX - sometimes these are 0; assume that means that no
|
|
* value is provided.
|
|
*/
|
|
if (cv_rf_hdr.signal_level_dbm != 0) {
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.signal_dbm = -cv_rf_hdr.signal_level_dbm;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_signal_dbm = TRUE;
|
|
}
|
|
if (cv_rf_hdr.noise_level_dbm != 0) {
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.noise_dbm = -cv_rf_hdr.noise_level_dbm;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_noise_dbm = TRUE;
|
|
}
|
|
|
|
if (cv_rf_hdr.extensions_present & PRESENCE_MCS_HEADER) {
|
|
/*
|
|
* Make sure we have enough data left for the
|
|
* MCS header.
|
|
*/
|
|
if (length_remaining < COMMVIEW_NCFX_MCS_HEADER_SIZE) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("commview: MCS header goes past the NCFX data length %u",
|
|
cv_hdr.data_len);
|
|
return FALSE;
|
|
}
|
|
length_remaining -= COMMVIEW_NCFX_MCS_HEADER_SIZE;
|
|
|
|
/*
|
|
* Read the MCS header.
|
|
*/
|
|
if (!commview_ncfx_read_mcs_header(&cv_mcs_hdr, fh,
|
|
err, err_info))
|
|
return FALSE;
|
|
switch (rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy) {
|
|
|
|
case PHDR_802_11_PHY_11N:
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11n.has_mcs_index = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11n.mcs_index = cv_mcs_hdr.mcs_index;
|
|
/* number of STBC streams? */
|
|
switch (cv_mcs_hdr.channel_width) {
|
|
|
|
case 0x00:
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11n.has_bandwidth = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11n.bandwidth = PHDR_802_11_BANDWIDTH_20_MHZ;
|
|
break;
|
|
|
|
case 0x01:
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11n.has_bandwidth = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11n.bandwidth = PHDR_802_11_BANDWIDTH_40_MHZ;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
/* Guard interval? */
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11AC:
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.mcs[0] = cv_mcs_hdr.mcs_index;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.mcs[1] = 0;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.mcs[2] = 0;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.mcs[3] = 0;
|
|
/* Remaining MCS indices? */
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.nss[0] = cv_mcs_hdr.n_streams;
|
|
switch (cv_mcs_hdr.channel_width) {
|
|
|
|
case 0x00:
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.has_bandwidth = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.bandwidth = PHDR_802_11_BANDWIDTH_20_MHZ;
|
|
break;
|
|
|
|
case 0x01:
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.has_bandwidth = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.bandwidth = PHDR_802_11_BANDWIDTH_40_MHZ;
|
|
break;
|
|
|
|
case 0x02:
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.has_bandwidth = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ac.bandwidth = PHDR_802_11_BANDWIDTH_80_MHZ;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
/* Guard interval? */
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11AX:
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ax.has_mcs_index = TRUE;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ax.mcs = cv_mcs_hdr.mcs_index;
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy_info.info_11ax.nsts = cv_mcs_hdr.n_streams;
|
|
/* Bandwidth stuff? */
|
|
/* Guard interval? */
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default :
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("commview: unsupported encap for NCFX: %u",
|
|
cv_hdr.medium_type);
|
|
return FALSE;
|
|
}
|
|
|
|
tm.tm_year = cv_hdr.year - 1900;
|
|
tm.tm_mon = cv_hdr.month - 1;
|
|
tm.tm_mday = cv_hdr.day;
|
|
tm.tm_hour = cv_hdr.hours;
|
|
tm.tm_min = cv_hdr.minutes;
|
|
tm.tm_sec = cv_hdr.seconds;
|
|
tm.tm_isdst = -1;
|
|
|
|
rec->rec_type = REC_TYPE_PACKET;
|
|
rec->block = wtap_block_create(WTAP_BLOCK_PACKET);
|
|
rec->presence_flags = WTAP_HAS_TS;
|
|
|
|
if (length_remaining > WTAP_MAX_PACKET_SIZE_STANDARD) {
|
|
/*
|
|
* Probably a corrupt capture file; don't blow up trying
|
|
* to allocate space for an immensely-large packet.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("commview: File has %u-byte packet, bigger than maximum of %u",
|
|
length_remaining, WTAP_MAX_PACKET_SIZE_STANDARD);
|
|
return FALSE;
|
|
}
|
|
|
|
rec->rec_header.packet_header.len = length_remaining;
|
|
rec->rec_header.packet_header.caplen = length_remaining;
|
|
|
|
rec->ts.secs = mktime(&tm);
|
|
rec->ts.nsecs = cv_hdr.usecs * 1000;
|
|
|
|
return wtap_read_packet_bytes(fh, buf, rec->rec_header.packet_header.caplen, err, err_info);
|
|
}
|
|
|
|
static gboolean
|
|
commview_ncfx_read(wtap *wth, wtap_rec *rec, Buffer *buf, int *err,
|
|
gchar **err_info, gint64 *data_offset)
|
|
{
|
|
*data_offset = file_tell(wth->fh);
|
|
|
|
return commview_ncfx_read_packet(wth->fh, rec, buf, err, err_info);
|
|
}
|
|
|
|
static gboolean
|
|
commview_ncfx_seek_read(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;
|
|
|
|
return commview_ncfx_read_packet(wth->random_fh, rec, buf, err, err_info);
|
|
}
|
|
|
|
static gboolean
|
|
commview_ncfx_read_header(commview_ncfx_header_t *cv_hdr, FILE_T fh, int *err,
|
|
gchar **err_info)
|
|
{
|
|
if (!wtap_read_bytes_or_eof(fh, &cv_hdr->data_len, 4, err, err_info))
|
|
return FALSE;
|
|
|
|
/* Convert data length from little endian to host endian format */
|
|
cv_hdr->data_len = GUINT32_FROM_LE(cv_hdr->data_len);
|
|
|
|
/* It must be at least the length of the general header. */
|
|
if (cv_hdr->data_len < COMMVIEW_NCFX_HEADER_SIZE) {
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("commview: NCFX data length %u < %u",
|
|
cv_hdr->data_len,
|
|
COMMVIEW_NCFX_HEADER_SIZE);
|
|
return FALSE;
|
|
}
|
|
|
|
if (!wtap_read_bytes(fh, &cv_hdr->year, 2, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->month, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->day, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->hours, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->minutes, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->seconds, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->usecs, 4, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->medium_type, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->decryption_flag, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->direction, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->reserved1, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_hdr->reserved2, 1, err, err_info))
|
|
return FALSE;
|
|
|
|
/* Convert multi-byte values from little endian to host endian format */
|
|
cv_hdr->year = GUINT16_FROM_LE(cv_hdr->year);
|
|
cv_hdr->usecs = GUINT32_FROM_LE(cv_hdr->usecs);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
commview_ncfx_read_rf_header(commview_ncfx_rf_header_t *cv_rf_hdr, FILE_T fh,
|
|
int *err, gchar **err_info)
|
|
{
|
|
if (!wtap_read_bytes(fh, &cv_rf_hdr->header_len, 2, err, err_info))
|
|
return FALSE;
|
|
|
|
/* Convert header length from little endian to host endian format */
|
|
cv_rf_hdr->header_len = GUINT16_FROM_LE(cv_rf_hdr->header_len);
|
|
|
|
if (!wtap_read_bytes(fh, &cv_rf_hdr->status_modulation, 2, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_rf_hdr->frequency_band, 2, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_rf_hdr->channel, 2, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_rf_hdr->noise_level_dbm, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_rf_hdr->signal_level_dbm, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_rf_hdr->signal_level_percent, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_rf_hdr->reserved, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_rf_hdr->phy_rate, 4, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_rf_hdr->extensions_present, 4, err, err_info))
|
|
return FALSE;
|
|
|
|
/* Convert remaining multi-byte values from little endian to host endian format */
|
|
cv_rf_hdr->status_modulation = GUINT16_FROM_LE(cv_rf_hdr->status_modulation);
|
|
cv_rf_hdr->frequency_band = GUINT16_FROM_LE(cv_rf_hdr->frequency_band);
|
|
cv_rf_hdr->channel = GUINT16_FROM_LE(cv_rf_hdr->channel);
|
|
cv_rf_hdr->phy_rate = GUINT32_FROM_LE(cv_rf_hdr->phy_rate);
|
|
cv_rf_hdr->extensions_present = GUINT32_FROM_LE(cv_rf_hdr->extensions_present);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
commview_ncfx_read_mcs_header(commview_ncfx_mcs_header_t *cv_mcs_hdr, FILE_T fh,
|
|
int *err, gchar **err_info)
|
|
{
|
|
if (!wtap_read_bytes(fh, &cv_mcs_hdr->mcs_index, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_mcs_hdr->n_streams, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_mcs_hdr->channel_width, 1, err, err_info))
|
|
return FALSE;
|
|
if (!wtap_read_bytes(fh, &cv_mcs_hdr->guard_interval, 1, err, err_info))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Returns 0 if we can write out the specified encapsulation type
|
|
* into a CommView format file. */
|
|
static int
|
|
commview_ncfx_dump_can_write_encap(int encap)
|
|
{
|
|
switch (encap) {
|
|
|
|
case WTAP_ENCAP_ETHERNET :
|
|
case WTAP_ENCAP_IEEE_802_11 :
|
|
case WTAP_ENCAP_IEEE_802_11_WITH_RADIO :
|
|
case WTAP_ENCAP_PER_PACKET :
|
|
return 0;
|
|
|
|
default:
|
|
return WTAP_ERR_UNWRITABLE_ENCAP;
|
|
}
|
|
}
|
|
|
|
/* Returns TRUE on success, FALSE on failure;
|
|
sets "*err" to an error code on failure */
|
|
static gboolean
|
|
commview_ncfx_dump_open(wtap_dumper *wdh, int *err _U_, gchar **err_info _U_)
|
|
{
|
|
wdh->subtype_write = commview_ncfx_dump;
|
|
|
|
/* There is no file header to write out */
|
|
wdh->bytes_dumped = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Write a record for a packet to a dump file.
|
|
* Returns TRUE on success, FALSE on failure. */
|
|
static gboolean
|
|
commview_ncfx_dump(wtap_dumper *wdh, const wtap_rec *rec, const guint8 *pd,
|
|
int *err, gchar **err_info _U_)
|
|
{
|
|
commview_ncfx_header_t cv_hdr = {0};
|
|
struct tm *tm;
|
|
|
|
/* We can only write packet records. */
|
|
if (rec->rec_type != REC_TYPE_PACKET) {
|
|
*err = WTAP_ERR_UNWRITABLE_REC_TYPE;
|
|
return FALSE;
|
|
}
|
|
|
|
/* Don't write out anything bigger than we can read.
|
|
* (The length field in packet headers is 16 bits, which
|
|
* imposes a hard limit.) */
|
|
if (rec->rec_header.packet_header.caplen > 65535) {
|
|
*err = WTAP_ERR_PACKET_TOO_LARGE;
|
|
return FALSE;
|
|
}
|
|
|
|
cv_hdr.data_len = GUINT32_TO_LE((guint32)rec->rec_header.packet_header.caplen);
|
|
|
|
tm = localtime(&rec->ts.secs);
|
|
if (tm != NULL) {
|
|
cv_hdr.year = GUINT16_TO_LE(tm->tm_year + 1900);
|
|
cv_hdr.month = tm->tm_mon + 1;
|
|
cv_hdr.day = tm->tm_mday;
|
|
cv_hdr.hours = tm->tm_hour;
|
|
cv_hdr.minutes = tm->tm_min;
|
|
cv_hdr.seconds = tm->tm_sec;
|
|
cv_hdr.usecs = GUINT32_TO_LE(rec->ts.nsecs / 1000);
|
|
} else {
|
|
/*
|
|
* Second before the Epoch.
|
|
*/
|
|
cv_hdr.year = GUINT16_TO_LE(1969);
|
|
cv_hdr.month = 12;
|
|
cv_hdr.day = 31;
|
|
cv_hdr.hours = 23;
|
|
cv_hdr.minutes = 59;
|
|
cv_hdr.seconds = 59;
|
|
cv_hdr.usecs = 0;
|
|
}
|
|
cv_hdr.reserved1 = 0;
|
|
cv_hdr.reserved2 = 0;
|
|
|
|
switch(rec->rec_header.packet_header.pkt_encap) {
|
|
|
|
case WTAP_ENCAP_ETHERNET :
|
|
cv_hdr.medium_type = MEDIUM_ETHERNET;
|
|
cv_hdr.decryption_flag = 0x00;
|
|
cv_hdr.direction = 0x00; /* what does this mean? */
|
|
break;
|
|
|
|
case WTAP_ENCAP_IEEE_802_11 :
|
|
/* XXX - the claim is that the RF header is mandatory */
|
|
cv_hdr.medium_type = MEDIUM_WIFI;
|
|
break;
|
|
|
|
case WTAP_ENCAP_IEEE_802_11_WITH_RADIO :
|
|
cv_hdr.medium_type = MEDIUM_WIFI;
|
|
|
|
#if 0
|
|
switch (rec->rec_header.packet_header.pseudo_header.ieee_802_11.phy) {
|
|
|
|
case PHDR_802_11_PHY_11N:
|
|
cv_hdr.status_modulation = STATUS_MODULATION_HT_PHY;
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11AC:
|
|
cv_hdr.status_modulation = STATUS_MODULATION_VHT_PHY;
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11AX:
|
|
cv_hdr.status_modulation = STATUS_MODULATION_HE_PHY;
|
|
break;
|
|
|
|
default:
|
|
cv_hdr.status_modulation = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Pick the band based on the frequency.
|
|
*/
|
|
if (rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_frequency) {
|
|
if (rec->rec_header.packet_header.pseudo_header.ieee_802_11.frequency > 2484) {
|
|
/* 5 GHz band */
|
|
cv_hdr.frequency_band = BAND_5GHZ;
|
|
} else {
|
|
/* 2.4 GHz band */
|
|
cv_hdr.frequency_band = BAND_2_4GHZ;
|
|
}
|
|
} else {
|
|
/* Band is unknown. */
|
|
cv_hdr.band = 0;
|
|
}
|
|
|
|
cv_hdr.channel =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_channel ?
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.channel :
|
|
0;
|
|
cv_hdr.noise_level_dbm =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_noise_dbm ?
|
|
-rec->rec_header.packet_header.pseudo_header.ieee_802_11.noise_dbm :
|
|
0;
|
|
cv_hdr.signal_level_dbm =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_signal_dbm ?
|
|
-rec->rec_header.packet_header.pseudo_header.ieee_802_11.signal_dbm :
|
|
0;
|
|
cv_hdr.signal_level_percent =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_signal_percent ?
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.signal_percent :
|
|
0;
|
|
cv_hdr.reserved = 0;
|
|
cv_hdr.phy_rate =
|
|
rec->rec_header.packet_header.pseudo_header.ieee_802_11.has_data_rate ?
|
|
(guint32)(rec->rec_header.packet_header.pseudo_header.ieee_802_11.data_rate & 0xFF) :
|
|
0;
|
|
#endif
|
|
break;
|
|
|
|
default :
|
|
*err = WTAP_ERR_UNWRITABLE_ENCAP;
|
|
return FALSE;
|
|
}
|
|
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.data_len, 4, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.year, 2, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.month, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.day, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.hours, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.minutes, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.seconds, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.usecs, 4, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.medium_type, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.decryption_flag, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.direction, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.reserved1, 1, err))
|
|
return FALSE;
|
|
if (!wtap_dump_file_write(wdh, &cv_hdr.reserved2, 1, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += COMMVIEW_NCFX_HEADER_SIZE;
|
|
|
|
/* XXX - RF and MCS headers */
|
|
|
|
if (!wtap_dump_file_write(wdh, pd, rec->rec_header.packet_header.caplen, err))
|
|
return FALSE;
|
|
wdh->bytes_dumped += rec->rec_header.packet_header.caplen;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static const struct supported_block_type commview_blocks_supported[] = {
|
|
/*
|
|
* We support packet blocks, with no comments or other options.
|
|
*/
|
|
{ WTAP_BLOCK_PACKET, MULTIPLE_BLOCKS_SUPPORTED, NO_OPTIONS_SUPPORTED }
|
|
};
|
|
|
|
static const struct file_type_subtype_info commview_ncf_info = {
|
|
"TamoSoft CommView NCF", "commview-ncf", "ncf", NULL,
|
|
FALSE, BLOCKS_SUPPORTED(commview_blocks_supported),
|
|
commview_ncf_dump_can_write_encap, commview_ncf_dump_open, NULL
|
|
};
|
|
|
|
static const struct file_type_subtype_info commview_ncfx_info = {
|
|
"TamoSoft CommView NCFX", "commview-ncfx", "ncfx", NULL,
|
|
FALSE, BLOCKS_SUPPORTED(commview_blocks_supported),
|
|
commview_ncfx_dump_can_write_encap, commview_ncfx_dump_open, NULL
|
|
};
|
|
|
|
void register_commview(void)
|
|
{
|
|
commview_ncf_file_type_subtype = wtap_register_file_type_subtype(&commview_ncf_info);
|
|
commview_ncfx_file_type_subtype = wtap_register_file_type_subtype(&commview_ncfx_info);
|
|
|
|
/*
|
|
* Register name for backwards compatibility with the
|
|
* wtap_filetypes table in Lua.
|
|
*
|
|
* We don't need to register the new type, as the Wireshark
|
|
* version with which we're providing backwards compatibility
|
|
* didn't support the NCFX format. New code should fetch
|
|
* the file type/subtype with wtap_name_to_file_type_subtype().
|
|
*/
|
|
wtap_register_backwards_compatibility_lua_name("COMMVIEW",
|
|
commview_ncf_file_type_subtype);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://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:
|
|
*/
|