static int
commview_read_packet(FILE_T fh, struct wtap_pkthdr *phdr, Buffer *buf,
int *err, gchar **err_info)
{
commview_header_t cv_hdr;
struct tm tm;
if(!commview_read_header(&cv_hdr, fh, err, err_info))
return FALSE;
switch(cv_hdr.flags & FLAGS_MEDIUM) {
case MEDIUM_ETHERNET :
phdr->pkt_encap = WTAP_ENCAP_ETHERNET;
phdr->pseudo_header.eth.fcs_len = -1; /* Unknown */
break;
case MEDIUM_WIFI :
phdr->pkt_encap = WTAP_ENCAP_IEEE_802_11_WITH_RADIO;
phdr->pseudo_header.ieee_802_11.fcs_len = -1; /* Unknown */
phdr->pseudo_header.ieee_802_11.channel = cv_hdr.channel;
phdr->pseudo_header.ieee_802_11.data_rate =
cv_hdr.rate | (cv_hdr.direction << 8);
phdr->pseudo_header.ieee_802_11.signal_level = cv_hdr.signal_level_percent;
break;
case MEDIUM_TOKEN_RING :
phdr->pkt_encap = WTAP_ENCAP_TOKEN_RING;
break;
default :
*err = WTAP_ERR_BAD_FILE;
*err_info = g_strdup_printf("commview: unsupported encap: %u",
cv_hdr.flags & FLAGS_MEDIUM);
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;
phdr->rec_type = REC_TYPE_PACKET;
phdr->presence_flags = WTAP_HAS_TS;
phdr->len = cv_hdr.data_len;
phdr->caplen = cv_hdr.data_len;
phdr->ts.secs = mktime(&tm);
phdr->ts.nsecs = cv_hdr.usecs * 1000;
return wtap_read_packet_bytes(fh, buf, phdr->caplen, err, err_info);
}
int commview_open(wtap *wth, int *err, gchar **err_info)
{
commview_header_t cv_hdr;
if(!commview_read_header(&cv_hdr, wth->fh, err, err_info)) {
if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
return -1;
return 0;
}
/* If any of these fields do not match what we expect, bail out. */
if(cv_hdr.version != 0 ||
cv_hdr.year < 1970 || cv_hdr.year >= 2038 ||
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 ||
cv_hdr.signal_level_percent > 100 ||
(cv_hdr.flags & FLAGS_RESERVED) != 0 ||
((cv_hdr.flags & FLAGS_MEDIUM) != MEDIUM_ETHERNET &&
(cv_hdr.flags & FLAGS_MEDIUM) != MEDIUM_WIFI &&
(cv_hdr.flags & FLAGS_MEDIUM) != MEDIUM_TOKEN_RING))
return 0; /* 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 -1;
/* Set up the pointers to the handlers for this file type */
wth->subtype_read = commview_read;
wth->subtype_seek_read = commview_seek_read;
wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_COMMVIEW;
wth->file_encap = WTAP_ENCAP_PER_PACKET;
wth->tsprecision = WTAP_FILE_TSPREC_USEC;
return 1; /* Our kind of file */
}
static gboolean
commview_seek_read(wtap *wth, gint64 seek_off, union wtap_pseudo_header
*pseudo_header, guint8 *pd, int length, int *err,
gchar **err_info)
{
commview_header_t cv_hdr;
int bytes_read;
if(file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
return FALSE;
if(!commview_read_header(&cv_hdr, wth->random_fh, err, err_info)) {
if(*err == 0)
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
if(length != cv_hdr.data_len) {
*err = WTAP_ERR_BAD_FILE;
*err_info = g_strdup_printf("commview: record length %u doesn't match requested length %d", cv_hdr.data_len, length);
return FALSE;
}
commview_set_pseudo_header(&cv_hdr, pseudo_header);
bytes_read = file_read(pd, cv_hdr.data_len, wth->random_fh);
if(bytes_read != cv_hdr.data_len) {
*err = file_error(wth->random_fh, err_info);
if(*err == 0)
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
return TRUE;
}
static gboolean
commview_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset)
{
commview_header_t cv_hdr;
struct tm tm;
int bytes_read;
*data_offset = wth->data_offset;
if(!commview_read_header(&cv_hdr, wth->fh, err, err_info))
return FALSE;
wth->data_offset += COMMVIEW_HEADER_SIZE;
switch(cv_hdr.flags & FLAGS_MEDIUM) {
case MEDIUM_ETHERNET :
wth->phdr.pkt_encap = WTAP_ENCAP_ETHERNET;
break;
case MEDIUM_WIFI :
wth->phdr.pkt_encap = WTAP_ENCAP_IEEE_802_11_WITH_RADIO;
break;
case MEDIUM_TOKEN_RING :
wth->phdr.pkt_encap = WTAP_ENCAP_TOKEN_RING;
break;
default :
*err = WTAP_ERR_BAD_FILE;
*err_info = g_strdup_printf("commview: unsupported encap: %u",
cv_hdr.flags & FLAGS_MEDIUM);
return FALSE;
}
commview_set_pseudo_header(&cv_hdr, &wth->pseudo_header);
buffer_assure_space(wth->frame_buffer, cv_hdr.data_len);
bytes_read = file_read(buffer_start_ptr(wth->frame_buffer),
cv_hdr.data_len, wth->fh);
if(bytes_read != cv_hdr.data_len) {
*err = file_error(wth->fh, err_info);
if(*err == 0)
*err = WTAP_ERR_SHORT_READ;
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;
wth->data_offset += cv_hdr.data_len;
wth->phdr.presence_flags = WTAP_HAS_TS;
wth->phdr.len = cv_hdr.data_len;
wth->phdr.caplen = cv_hdr.data_len;
wth->phdr.ts.secs = mktime(&tm);
wth->phdr.ts.nsecs = cv_hdr.usecs * 1000;
return TRUE;
}
static int
commview_read_packet(FILE_T fh, struct wtap_pkthdr *phdr, Buffer *buf,
int *err, gchar **err_info)
{
commview_header_t cv_hdr;
struct tm tm;
guint frequency;
if(!commview_read_header(&cv_hdr, fh, err, err_info))
return FALSE;
switch(cv_hdr.flags & FLAGS_MEDIUM) {
case MEDIUM_ETHERNET :
phdr->pkt_encap = WTAP_ENCAP_ETHERNET;
phdr->pseudo_header.eth.fcs_len = -1; /* Unknown */
break;
case MEDIUM_WIFI :
phdr->pkt_encap = WTAP_ENCAP_IEEE_802_11_WITH_RADIO;
phdr->pseudo_header.ieee_802_11.fcs_len = -1; /* Unknown */
phdr->pseudo_header.ieee_802_11.decrypted = FALSE;
phdr->pseudo_header.ieee_802_11.datapad = FALSE;
phdr->pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_UNKNOWN;
phdr->pseudo_header.ieee_802_11.presence_flags =
PHDR_802_11_HAS_CHANNEL |
PHDR_802_11_HAS_DATA_RATE |
PHDR_802_11_HAS_SIGNAL_PERCENT;
switch (cv_hdr.band) {
case BAND_11A:
phdr->pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11A;
phdr->pseudo_header.ieee_802_11.phy_info.info_11a.presence_flags =
PHDR_802_11A_HAS_TURBO_TYPE;
phdr->pseudo_header.ieee_802_11.phy_info.info_11a.turbo_type =
PHDR_802_11A_TURBO_TYPE_NORMAL;
frequency = ieee80211_chan_to_mhz(cv_hdr.channel, FALSE);
break;
case BAND_11B:
phdr->pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11B;
phdr->pseudo_header.ieee_802_11.phy_info.info_11b.presence_flags = 0;
frequency = ieee80211_chan_to_mhz(cv_hdr.channel, TRUE);
break;
case BAND_11G:
phdr->pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11G;
phdr->pseudo_header.ieee_802_11.phy_info.info_11g.presence_flags =
PHDR_802_11G_HAS_MODE;
phdr->pseudo_header.ieee_802_11.phy_info.info_11g.mode =
PHDR_802_11G_MODE_NORMAL;
frequency = ieee80211_chan_to_mhz(cv_hdr.channel, TRUE);
break;
case BAND_11A_TURBO:
phdr->pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11A;
phdr->pseudo_header.ieee_802_11.phy_info.info_11a.presence_flags =
PHDR_802_11A_HAS_TURBO_TYPE;
phdr->pseudo_header.ieee_802_11.phy_info.info_11a.turbo_type =
PHDR_802_11A_TURBO_TYPE_TURBO;
frequency = ieee80211_chan_to_mhz(cv_hdr.channel, FALSE);
break;
case BAND_SUPERG:
phdr->pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11G;
phdr->pseudo_header.ieee_802_11.phy_info.info_11g.presence_flags =
PHDR_802_11G_HAS_MODE;
phdr->pseudo_header.ieee_802_11.phy_info.info_11g.mode =
PHDR_802_11G_MODE_SUPER_G;
frequency = ieee80211_chan_to_mhz(cv_hdr.channel, TRUE);
break;
case BAND_11N_5GHZ:
phdr->pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11N;
phdr->pseudo_header.ieee_802_11.phy_info.info_11n.presence_flags =
0;
frequency = ieee80211_chan_to_mhz(cv_hdr.channel, FALSE);
break;
case BAND_11N_2_4GHZ:
phdr->pseudo_header.ieee_802_11.phy = PHDR_802_11_PHY_11N;
phdr->pseudo_header.ieee_802_11.phy_info.info_11n.presence_flags =
0;
frequency = ieee80211_chan_to_mhz(cv_hdr.channel, TRUE);
break;
case BAND_PUBLIC_SAFETY:
/*
* XXX - what do we do here? What are the channel
* numbers? How do we distinguish the several
* different flavors of 4.9 GHz frequencies?
*/
frequency = 0;
break;
default:
frequency = 0;
break;
}
if (frequency != 0) {
phdr->pseudo_header.ieee_802_11.presence_flags |=
PHDR_802_11_HAS_FREQUENCY;
phdr->pseudo_header.ieee_802_11.frequency = frequency;
}
phdr->pseudo_header.ieee_802_11.channel = cv_hdr.channel;
phdr->pseudo_header.ieee_802_11.data_rate =
cv_hdr.rate | (cv_hdr.direction << 8);
phdr->pseudo_header.ieee_802_11.signal_percent = cv_hdr.signal_level_percent;
/*
* XXX - these are positive in captures I've seen; does
* that mean that they are the negative of the actual
* dBm value? (80 dBm is a bit more power than most
* countries' regulatory agencies are likely to allow
* any individual to have in their home. :-))
*
* XXX - sometimes these are 0; assume that means that no
* value is provided.
*/
if (cv_hdr.signal_level_dbm != 0) {
phdr->pseudo_header.ieee_802_11.signal_dbm = -cv_hdr.signal_level_dbm;
phdr->pseudo_header.ieee_802_11.presence_flags |=
PHDR_802_11_HAS_SIGNAL_DBM;
}
if (cv_hdr.noise_level != 0) {
phdr->pseudo_header.ieee_802_11.noise_dbm = -cv_hdr.noise_level;
phdr->pseudo_header.ieee_802_11.presence_flags |=
PHDR_802_11_HAS_NOISE_DBM;
}
break;
case MEDIUM_TOKEN_RING :
phdr->pkt_encap = WTAP_ENCAP_TOKEN_RING;
break;
default :
*err = WTAP_ERR_BAD_FILE;
*err_info = g_strdup_printf("commview: unsupported encap: %u",
cv_hdr.flags & FLAGS_MEDIUM);
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;
phdr->rec_type = REC_TYPE_PACKET;
phdr->presence_flags = WTAP_HAS_TS;
phdr->len = cv_hdr.data_len;
phdr->caplen = cv_hdr.data_len;
phdr->ts.secs = mktime(&tm);
phdr->ts.nsecs = cv_hdr.usecs * 1000;
return wtap_read_packet_bytes(fh, buf, phdr->caplen, err, err_info);
}
