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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 "config.h"
#include "gpsmap_cache.h"
// Read a cache from a file, error out if there isn't a cache or there isn't a
// valid cache
int ReadGpsCacheFile(const char *in_gpsfname,
vector<wireless_network *> *in_networklist,
vector<gps_point *> *in_points) {
gpscache_header fheader;
struct stat fstat;
time_t gpsmod;
int slashpos;
char cachefname[1024];
struct passwd *pw;
#ifdef HAVE_LIBZ
gzFile cachefile;
#else
FILE *cachefile;
#endif
// Get home dir
pw = getpwuid(getuid());
if (pw == NULL) {
fprintf(stderr, "ERROR: Could not find home directory path for gpscache, "
"getpwuid() failed, %s\n", strerror(errno));
return -1;
}
// Get gps and net xml timestamps
if (stat(in_gpsfname, &fstat) == -1) {
fprintf(stderr, "ERROR: Could not stat gpsxml file %s\n",
in_gpsfname);
return -1;
}
gpsmod = fstat.st_mtime;
// Find the file name of the gps file
for (slashpos = strlen(in_gpsfname); slashpos >= 0; slashpos--) {
if (in_gpsfname[slashpos] == '/')
break;
}
slashpos++;
snprintf(cachefname, 1024, "%s/%s/%s%s", pw->pw_dir, GPSCACHE_DIR,
in_gpsfname + slashpos, GPSCACHE_SUFFIX);
// Bail if the cache file doesn't exist
#ifdef HAVE_LIBZ
if ((cachefile = gzopen(cachefname, "rb")) == NULL)
#else
if ((cachefile = fopen(cachefname, "r")) == NULL)
#endif
return -1;
// Read the header
#ifdef HAVE_LIBZ
if (gzread(cachefile, &fheader, sizeof(gpscache_header)) <
(int) sizeof(gpscache_header)) {
gzclose(cachefile);
return -1;
}
#else
if ((fread(&fheader, sizeof(gpscache_header), 1, cachefile)) <
(int) sizeof(gpscache_header)) {
fclose(cachefile);
return -1;
}
#endif
if (fheader.cache_magic != GPSCACHE_MAGIC ||
fheader.cache_version != GPSCACHE_VERSION) {
#ifdef HAVE_LIBZ
gzclose(cachefile);
#else
fclose(cachefile);
#endif
return -1;
}
if (fheader.gps_last_mod != gpsmod) {
fprintf(stderr, "NOTICE: Cache file %s doesn't match %s modification time.\n",
cachefname, in_gpsfname);
#ifdef HAVE_LIBZ
gzclose(cachefile);
#else
fclose(cachefile);
#endif
return -1;
}
// Now our file is good, so read in all the networks and points
in_networklist->reserve(fheader.num_networks);
for (unsigned int nnet = 0; nnet < fheader.num_networks; nnet++) {
gpscache_network cnet;
wireless_network *wnet = new wireless_network;
#ifdef HAVE_LIBZ
if (gzread(cachefile, &cnet, sizeof(gpscache_network)) <
(int) sizeof(gpscache_network)) {
gzclose(cachefile);
return -1;
}
#else
if ((fread(&cnet, sizeof(gpscache_network), 1, cachefile)) <
(int) sizeof(gpscache_network)) {
fclose(cachefile);
return -1;
}
#endif
wnet->type = (wireless_network_type) cnet.type;
wnet->bssid = mac_addr((uint8_t *) cnet.bssid);
wnet->ssid = cnet.ssid;
wnet->beacon_info = cnet.beacon_info;
wnet->llc_packets = cnet.llc_packets;
wnet->data_packets = cnet.data_packets;
wnet->crypt_packets = cnet.crypt_packets;
wnet->interesting_packets = cnet.interesting_packets;
wnet->channel = cnet.channel;
wnet->crypt_set = cnet.wep;
wnet->last_time = cnet.last_time;
wnet->first_time = cnet.first_time;
wnet->beacon = cnet.beacon;
wnet->carrier_set = cnet.carrier_set;
wnet->encoding_set = cnet.encoding_set;
wnet->datasize = cnet.data_size;
wnet->ipdata.range_ip[0] = cnet.range_ip[0];
wnet->ipdata.range_ip[1] = cnet.range_ip[1];
wnet->ipdata.range_ip[2] = cnet.range_ip[2];
wnet->ipdata.range_ip[3] = cnet.range_ip[3];
in_networklist->push_back(wnet);
}
// Now read all the points
int point_id = 0;
in_points->reserve(fheader.num_points);
for (unsigned int nsam = 0; nsam < fheader.num_points; nsam++) {
gpscache_point cpt;
gps_point *pt = new gps_point;
#ifdef HAVE_LIBZ
if (gzread(cachefile, &cpt, sizeof(gpscache_point)) <
(int) sizeof(gpscache_point)) {
gzclose(cachefile);
return -1;
}
#else
if ((fread(&cpt, sizeof(gpscache_point), 1, cachefile)) <
(int) sizeof(gpscache_point)) {
fclose(cachefile);
return -1;
}
#endif
strncpy(pt->bssid, cpt.bssid, MAC_STR_LEN);
strncpy(pt->source, cpt.source, MAC_STR_LEN);
pt->bssid[MAC_STR_LEN-1] = '\0';
pt->source[MAC_STR_LEN-1] = '\0';
pt->tv_sec = cpt.tv_sec;
pt->tv_usec = cpt.tv_usec;
pt->lat = cpt.lat;
pt->lon = cpt.lon;
pt->spd = cpt.spd;
pt->alt = cpt.alt;
pt->heading = cpt.heading;
pt->fix = cpt.fix;
pt->signal = cpt.signal;
pt->noise = cpt.noise;
pt->id = point_id++;
in_points->push_back(pt);
}
#ifdef HAVE_LIBZ
gzclose(cachefile);
#else
fclose(cachefile);
#endif
return 1;
}
// Cache gps data to a file
int WriteGpsCacheFile(const char *in_gpsfname,
vector<wireless_network *> *in_networklist,
vector<gps_point *> *in_points) {
struct stat fstat;
time_t gpsmod;
int slashpos;
char cachefname[1024];
struct passwd *pw;
#ifdef HAVE_LIBZ
gzFile cachefile;
#else
FILE *cachefile;
#endif
// Get home dir
pw = getpwuid(getuid());
if (pw == NULL) {
fprintf(stderr, "ERROR: Could not find home directory path for gpscache, "
"getpwuid() failed, %s\n", strerror(errno));
return -1;
}
// Get gps and net xml timestamps
if (stat(in_gpsfname, &fstat) == -1) {
fprintf(stderr, "ERROR: Could not stat gpsxml file %s\n",
in_gpsfname);
return -1;
}
gpsmod = fstat.st_mtime;
// Find out if the cache dir exists, try to make it if it doesn't.
snprintf(cachefname, 1024, "%s/%s/", pw->pw_dir, GPSCACHE_DIR);
if (stat(cachefname, &fstat) == -1) {
fprintf(stderr, "NOTICE: Config dir %s doesn't exist, making it...\n",
cachefname);
if (mkdir(cachefname, S_IRUSR | S_IWUSR | S_IXUSR) < 0) {
fprintf(stderr, "FATAL: Could not make cache dir, %s\n",
strerror(errno));
return -1;
}
}
// Find the file name of the gps file
for (slashpos = strlen(in_gpsfname); slashpos >= 0; slashpos--) {
if (in_gpsfname[slashpos] == '/')
break;
}
slashpos++;
snprintf(cachefname, 1024, "%s/%s/%s%s", pw->pw_dir, GPSCACHE_DIR,
in_gpsfname + slashpos, GPSCACHE_SUFFIX);
// Open the cache file for writing
#ifdef HAVE_LIBZ
if ((cachefile = gzopen(cachefname, "wb")) == NULL) {
#else
if ((cachefile = fopen(cachefname, "w")) == NULL) {
#endif
fprintf(stderr, "WARNING: Could not open gps cache file %s for writing (%s)\n",
cachefname, strerror(errno));
return -1;
}
gpscache_header fheader;
fheader.cache_magic = GPSCACHE_MAGIC;
fheader.cache_version = GPSCACHE_VERSION;
fheader.gps_last_mod = gpsmod;
fheader.num_networks = in_networklist->size();
fheader.num_points = in_points->size();
#ifdef HAVE_LIBZ
if (gzwrite(cachefile, &fheader, sizeof(gpscache_header)) <
(int) sizeof(gpscache_header)) {
gzclose(cachefile);
fprintf(stderr, "FATAL: Error writing to cache %s: %s\n",
cachefname, strerror(errno));
unlink(cachefname);
return -1;
}
#else
if (fwrite(&fheader, sizeof(gpscache_header), 1, cachefile) <
(int) sizeof(gpscache_header)) {
fclose(cachefile);
fprintf(stderr, "FATAL: Error writing to cache %s: %s\n",
cachefname, strerror(errno));
unlink(cachefname);
return -1;
}
#endif
// Write the networks out
for (unsigned int nnet = 0; nnet < fheader.num_networks; nnet++) {
gpscache_network cnet;
wireless_network *wnet = (*in_networklist)[nnet];
cnet.type = wnet->type;
for (unsigned int m = 0; m < 6; m++)
cnet.bssid[m] = wnet->bssid[m];
snprintf(cnet.ssid, 32, "%s", wnet->ssid.c_str());
snprintf(cnet.beacon_info, 256, "%s", wnet->beacon_info.c_str());
cnet.llc_packets = wnet->llc_packets;
cnet.data_packets = wnet->data_packets;
cnet.crypt_packets = wnet->crypt_packets;
cnet.interesting_packets = wnet->interesting_packets;
cnet.channel = wnet->channel;
cnet.wep = wnet->crypt_set;
cnet.last_time = wnet->last_time;
cnet.first_time = wnet->first_time;
cnet.beacon = wnet->beacon;
cnet.carrier_set = wnet->carrier_set;
cnet.encoding_set = wnet->encoding_set;
cnet.data_size = wnet->datasize;
cnet.range_ip[0] = wnet->ipdata.range_ip[0];
cnet.range_ip[1] = wnet->ipdata.range_ip[1];
cnet.range_ip[2] = wnet->ipdata.range_ip[2];
cnet.range_ip[3] = wnet->ipdata.range_ip[3];
#ifdef HAVE_LIBZ
if (gzwrite(cachefile, &cnet, sizeof(gpscache_network)) <
(int) sizeof(gpscache_network)) {
gzclose(cachefile);
fprintf(stderr, "FATAL: Error writing to cache %s: %s\n",
cachefname, strerror(errno));
unlink(cachefname);
return -1;
}
#else
if ((fwrite(&cnet, sizeof(gpscache_network), 1, cachefile)) <
(int) sizeof(gpscache_network)) {
fclose(cachefile);
fprintf(stderr, "FATAL: Error writing to cache %s: %s\n",
cachefname, strerror(errno));
unlink(cachefname);
return -1;
}
#endif
}
// Now read all the points
for (unsigned int nsam = 0; nsam < fheader.num_points; nsam++) {
gpscache_point cpt;
gps_point *pt = (*in_points)[nsam];
memset(&cpt, 0, sizeof cpt);
strncpy(cpt.bssid, pt->bssid, sizeof(cpt.bssid)-1);
strncpy(cpt.source, pt->source, sizeof(cpt.source)-1);
cpt.tv_sec = pt->tv_sec;
cpt.tv_usec = pt->tv_usec;
cpt.lat = pt->lat;
cpt.lon = pt->lon;
cpt.spd = pt->spd;
cpt.alt = pt->alt;
cpt.heading = pt->heading;
cpt.fix = pt->fix;
cpt.signal = pt->signal;
cpt.noise = pt->noise;
#ifdef HAVE_LIBZ
if (gzwrite(cachefile, &cpt, sizeof(gpscache_point)) <
(int) sizeof(gpscache_point)) {
gzclose(cachefile);
fprintf(stderr, "FATAL: Error writing to cache %s: %s\n",
cachefname, strerror(errno));
unlink(cachefname);
return -1;
}
#else
if ((fwrite(&cpt, sizeof(gpscache_point), 1, cachefile)) <
(int) sizeof(gpscache_point)) {
fclose(cachefile);
fprintf(stderr, "FATAL: Error writing to cache %s: %s\n",
cachefname, strerror(errno));
unlink(cachefname);
return -1;
}
#endif
}
#ifdef HAVE_LIBZ
gzclose(cachefile);
#else
fclose(cachefile);
#endif
return 1;
}
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