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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2017 ZeroTier, Inc. https://www.zerotier.com/
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
* --
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial closed-source software that incorporates or links
* directly against ZeroTier software without disclosing the source code
* of your own application.
*/
#ifdef ZT_ENABLE_CLUSTER
#include <math.h>
#include <cmath>
#include "ClusterGeoIpService.hpp"
#include "../node/Utils.hpp"
#include "../osdep/OSUtils.hpp"
#define ZT_CLUSTERGEOIPSERVICE_FILE_MODIFICATION_CHECK_EVERY 10000
namespace ZeroTier {
ClusterGeoIpService::ClusterGeoIpService() :
_pathToCsv(),
_ipStartColumn(-1),
_ipEndColumn(-1),
_latitudeColumn(-1),
_longitudeColumn(-1),
_lastFileCheckTime(0),
_csvModificationTime(0),
_csvFileSize(0)
{
}
ClusterGeoIpService::~ClusterGeoIpService()
{
}
bool ClusterGeoIpService::locate(const InetAddress &ip,int &x,int &y,int &z)
{
Mutex::Lock _l(_lock);
if ((_pathToCsv.length() > 0)&&((OSUtils::now() - _lastFileCheckTime) > ZT_CLUSTERGEOIPSERVICE_FILE_MODIFICATION_CHECK_EVERY)) {
_lastFileCheckTime = OSUtils::now();
if ((_csvFileSize != OSUtils::getFileSize(_pathToCsv.c_str()))||(_csvModificationTime != OSUtils::getLastModified(_pathToCsv.c_str())))
_load(_pathToCsv.c_str(),_ipStartColumn,_ipEndColumn,_latitudeColumn,_longitudeColumn);
}
/* We search by looking up the upper bound of the sorted vXdb vectors
* and then iterating down for a matching IP range. We stop when we hit
* the beginning or an entry whose start and end are before the IP we
* are searching. */
if ((ip.ss_family == AF_INET)&&(_v4db.size() > 0)) {
_V4E key;
key.start = Utils::ntoh((uint32_t)(reinterpret_cast<const struct sockaddr_in *>(&ip)->sin_addr.s_addr));
std::vector<_V4E>::const_iterator i(std::upper_bound(_v4db.begin(),_v4db.end(),key));
while (i != _v4db.begin()) {
--i;
if ((key.start >= i->start)&&(key.start <= i->end)) {
x = i->x;
y = i->y;
z = i->z;
//printf("%s : %f,%f %d,%d,%d\n",ip.toIpString().c_str(),i->lat,i->lon,x,y,z);
return true;
} else if ((key.start > i->start)&&(key.start > i->end))
break;
}
} else if ((ip.ss_family == AF_INET6)&&(_v6db.size() > 0)) {
_V6E key;
memcpy(key.start,reinterpret_cast<const struct sockaddr_in6 *>(&ip)->sin6_addr.s6_addr,16);
std::vector<_V6E>::const_iterator i(std::upper_bound(_v6db.begin(),_v6db.end(),key));
while (i != _v6db.begin()) {
--i;
const int s_vs_s = memcmp(key.start,i->start,16);
const int s_vs_e = memcmp(key.start,i->end,16);
if ((s_vs_s >= 0)&&(s_vs_e <= 0)) {
x = i->x;
y = i->y;
z = i->z;
//printf("%s : %f,%f %d,%d,%d\n",ip.toIpString().c_str(),i->lat,i->lon,x,y,z);
return true;
} else if ((s_vs_s > 0)&&(s_vs_e > 0))
break;
}
}
return false;
}
void ClusterGeoIpService::_parseLine(const char *line,std::vector<_V4E> &v4db,std::vector<_V6E> &v6db,int ipStartColumn,int ipEndColumn,int latitudeColumn,int longitudeColumn)
{
std::vector<std::string> ls(OSUtils::split(line,",\t","\\","\"'"));
if ( ((ipStartColumn >= 0)&&(ipStartColumn < (int)ls.size()))&&
((ipEndColumn >= 0)&&(ipEndColumn < (int)ls.size()))&&
((latitudeColumn >= 0)&&(latitudeColumn < (int)ls.size()))&&
((longitudeColumn >= 0)&&(longitudeColumn < (int)ls.size())) ) {
InetAddress ipStart(ls[ipStartColumn].c_str(),0);
InetAddress ipEnd(ls[ipEndColumn].c_str(),0);
const double lat = strtod(ls[latitudeColumn].c_str(),(char **)0);
const double lon = strtod(ls[longitudeColumn].c_str(),(char **)0);
if ((ipStart.ss_family == ipEnd.ss_family)&&(ipStart)&&(ipEnd)&&(std::isfinite(lat))&&(std::isfinite(lon))) {
const double latRadians = lat * 0.01745329251994; // PI / 180
const double lonRadians = lon * 0.01745329251994; // PI / 180
const double cosLat = cos(latRadians);
const int x = (int)round((-6371.0) * cosLat * cos(lonRadians)); // 6371 == Earth's approximate radius in kilometers
const int y = (int)round(6371.0 * sin(latRadians));
const int z = (int)round(6371.0 * cosLat * sin(lonRadians));
if (ipStart.ss_family == AF_INET) {
v4db.push_back(_V4E());
v4db.back().start = Utils::ntoh((uint32_t)(reinterpret_cast<const struct sockaddr_in *>(&ipStart)->sin_addr.s_addr));
v4db.back().end = Utils::ntoh((uint32_t)(reinterpret_cast<const struct sockaddr_in *>(&ipEnd)->sin_addr.s_addr));
v4db.back().lat = (float)lat;
v4db.back().lon = (float)lon;
v4db.back().x = x;
v4db.back().y = y;
v4db.back().z = z;
//printf("%s - %s : %d,%d,%d\n",ipStart.toIpString().c_str(),ipEnd.toIpString().c_str(),x,y,z);
} else if (ipStart.ss_family == AF_INET6) {
v6db.push_back(_V6E());
memcpy(v6db.back().start,reinterpret_cast<const struct sockaddr_in6 *>(&ipStart)->sin6_addr.s6_addr,16);
memcpy(v6db.back().end,reinterpret_cast<const struct sockaddr_in6 *>(&ipEnd)->sin6_addr.s6_addr,16);
v6db.back().lat = (float)lat;
v6db.back().lon = (float)lon;
v6db.back().x = x;
v6db.back().y = y;
v6db.back().z = z;
//printf("%s - %s : %d,%d,%d\n",ipStart.toIpString().c_str(),ipEnd.toIpString().c_str(),x,y,z);
}
}
}
}
long ClusterGeoIpService::_load(const char *pathToCsv,int ipStartColumn,int ipEndColumn,int latitudeColumn,int longitudeColumn)
{
// assumes _lock is locked
FILE *f = fopen(pathToCsv,"rb");
if (!f)
return -1;
std::vector<_V4E> v4db;
std::vector<_V6E> v6db;
v4db.reserve(16777216);
v6db.reserve(16777216);
char buf[4096];
char linebuf[1024];
unsigned int lineptr = 0;
for(;;) {
int n = (int)fread(buf,1,sizeof(buf),f);
if (n <= 0)
break;
for(int i=0;i<n;++i) {
if ((buf[i] == '\r')||(buf[i] == '\n')||(buf[i] == (char)0)) {
if (lineptr) {
linebuf[lineptr] = (char)0;
_parseLine(linebuf,v4db,v6db,ipStartColumn,ipEndColumn,latitudeColumn,longitudeColumn);
}
lineptr = 0;
} else if (lineptr < (unsigned int)sizeof(linebuf))
linebuf[lineptr++] = buf[i];
}
}
if (lineptr) {
linebuf[lineptr] = (char)0;
_parseLine(linebuf,v4db,v6db,ipStartColumn,ipEndColumn,latitudeColumn,longitudeColumn);
}
fclose(f);
if ((v4db.size() > 0)||(v6db.size() > 0)) {
std::sort(v4db.begin(),v4db.end());
std::sort(v6db.begin(),v6db.end());
_pathToCsv = pathToCsv;
_ipStartColumn = ipStartColumn;
_ipEndColumn = ipEndColumn;
_latitudeColumn = latitudeColumn;
_longitudeColumn = longitudeColumn;
_lastFileCheckTime = OSUtils::now();
_csvModificationTime = OSUtils::getLastModified(pathToCsv);
_csvFileSize = OSUtils::getFileSize(pathToCsv);
_v4db.swap(v4db);
_v6db.swap(v6db);
return (long)(_v4db.size() + _v6db.size());
} else {
return 0;
}
}
} // namespace ZeroTier
#endif // ZT_ENABLE_CLUSTER
/*
int main(int argc,char **argv)
{
char buf[1024];
ZeroTier::ClusterGeoIpService gip;
printf("loading...\n");
gip.load("/Users/api/Code/ZeroTier/Infrastructure/root-servers/zerotier-one/cluster-geoip.csv",0,1,5,6);
printf("... done!\n"); fflush(stdout);
while (gets(buf)) { // unsafe, testing only
ZeroTier::InetAddress addr(buf,0);
printf("looking up: %s\n",addr.toString().c_str()); fflush(stdout);
int x = 0,y = 0,z = 0;
if (gip.locate(addr,x,y,z)) {
//printf("%s: %d,%d,%d\n",addr.toString().c_str(),x,y,z); fflush(stdout);
} else {
printf("%s: not found!\n",addr.toString().c_str()); fflush(stdout);
}
}
return 0;
}
*/
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