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/*
This file is part of Kismet
Kismet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Kismet is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Kismet; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "wtapfilesource.h"
#ifdef HAVE_LIBWIRETAP
int WtapFileSource::OpenSource() {
paused = 0;
int err;
char *unconst = strdup(interface.c_str());
#ifdef HAVE_WTAP_ARGQUAD
char *nfo;
packfile = wtap_open_offline(unconst, &err, &nfo, false);
#else
packfile = wtap_open_offline(unconst, &err, false);
#endif
if (packfile == NULL) {
snprintf(errstr, 1024, "Wtap file source unable to open %s: %s",
unconst, strerror(err));
free(unconst);
return -1;
}
free(unconst);
// We need to update this someday to handle wtapfiles with other encodings,
// like we do with pcapfiles
if (wtap_file_encap(packfile) != WTAP_ENCAP_IEEE_802_11 &&
wtap_file_encap(packfile) != WTAP_ENCAP_IEEE_802_11_WITH_RADIO) {
snprintf(errstr, 1024, "Wtap file '%s' not an 802.11 encapsulation.",
interface.c_str());
return -1;
}
num_packets = 0;
return 1;
}
int WtapFileSource::CloseSource() {
if (packfile != NULL)
wtap_close(packfile);
return 1;
}
int WtapFileSource::FetchPacket(kis_packet *packet, uint8_t *data, uint8_t *moddata) {
int err;
long int offset;
#ifdef HAVE_WTAPREAD_INTINT
if (!wtap_read(packfile, &err, (int *) &offset))
#elif defined(HAVE_WTAP_ARGQUAD)
char *nfo;
if (!wtap_read(packfile, &err, &nfo, &offset))
#else
if (!wtap_read(packfile, &err, &offset))
#endif
{
snprintf(errstr, 1024, "Wtap file source failed to read packet.");
return -1;
}
packet_header = wtap_phdr(packfile);
if (packet_header == NULL) {
snprintf(errstr, 1024, "Wtap file source failed to read header.\n");
return -1;
}
packet_data = wtap_buf_ptr(packfile);
if (packet_data == NULL) {
snprintf(errstr, 1024, "Wtap file source failed to read data.\n");
return -1;
}
if (paused)
return 0;
Wtap2Common(packet, data, moddata);
num_packets++;
snprintf(packet->sourcename, 32, "%s", name.c_str());
packet->parm = parameters;
return(packet->caplen);
}
int WtapFileSource::Wtap2Common(kis_packet *packet, uint8_t *data, uint8_t *moddata) {
memset(packet, 0, sizeof(kis_packet));
packet->caplen = kismin(packet_header->caplen, (uint32_t) MAX_PACKET_LEN);
packet->len = packet->caplen;
packet->signal = -1;
packet->noise = -1;
packet->ts.tv_sec = packet_header->ts.tv_sec;
packet->ts.tv_usec = packet_header->ts.tv_usec;
packet->data = data;
packet->moddata = moddata;
packet->modified = 0;
// We don't use GPS for wtapfiles
/*
if (gpsd != NULL) {
gps->FetchLoc(&packet->gps_lat, &packet->gps_lon, &packet->gps_alt,
&packet->gps_spd, &packet->gps_fix);
}
*/
memcpy(packet->data, packet_data, packet->caplen);
// We assume all packets are 802.11b for now
packet->carrier = carrier_80211b;
return 1;
}
// Nonclass registrant
KisPacketSource *wtapfilesource_registrant(string in_name, string in_device,
char *in_err) {
return new WtapFileSource(in_name, in_device);
}
#endif
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