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/*
* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
*
* 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 2 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/>.
*/
#include "IPLocation.h"
#include "BigNumber.h"
#include "Config.h"
#include "Errors.h"
#include "IpAddress.h"
#include "Log.h"
#include "Util.h"
#include <algorithm>
#include <fstream>
IpLocationStore::IpLocationStore() = default;
IpLocationStore::~IpLocationStore() = default;
void IpLocationStore::Load()
{
_ipLocationStore.clear();
TC_LOG_INFO("server.loading", "Loading IP Location Database...");
std::string databaseFilePath = sConfigMgr->GetStringDefault("IPLocationFile", "");
if (databaseFilePath.empty())
return;
// Check if file exists
std::ifstream databaseFile(databaseFilePath);
if (!databaseFile)
{
TC_LOG_ERROR("server.loading", "IPLocation: No ip database file exists ({}).", databaseFilePath);
return;
}
if (!databaseFile.is_open())
{
TC_LOG_ERROR("server.loading", "IPLocation: Ip database file ({}) can not be opened.", databaseFilePath);
return;
}
std::string ipFrom;
std::string ipTo;
std::string countryCode;
std::string countryName;
BigNumber bnParser;
BigNumber ipv4Max(0xFFFFFFFF);
BigNumber ipv6MappedMask(0xFFFF);
ipv6MappedMask <<= 32;
auto parseStringToIPv6 = [&](std::string const& str) -> Optional<std::array<uint8, 16>>
{
bnParser.SetDecStr(str);
if (!bnParser.SetDecStr(str))
return {};
// convert ipv4 to ipv6 v4 mapped value
if (bnParser <= ipv4Max)
bnParser += ipv6MappedMask;
return bnParser.ToByteArray<16>(false);
};
while (databaseFile.good())
{
// Read lines
if (!std::getline(databaseFile, ipFrom, ','))
break;
if (!std::getline(databaseFile, ipTo, ','))
break;
if (!std::getline(databaseFile, countryCode, ','))
break;
if (!std::getline(databaseFile, countryName, '\n'))
break;
// Remove new lines and return
std::erase_if(countryName, [](char c) { return c == '\r' || c == '\n'; });
// Remove quotation marks
std::erase(ipFrom, '"');
std::erase(ipTo, '"');
std::erase(countryCode, '"');
std::erase(countryName, '"');
if (countryCode == "-")
continue;
// Convert country code to lowercase
strToLower(countryCode);
Optional<std::array<uint8, 16>> from = parseStringToIPv6(ipFrom);
if (!from)
continue;
Optional<std::array<uint8, 16>> to = parseStringToIPv6(ipTo);
if (!to)
continue;
_ipLocationStore.emplace_back(*from, *to, std::move(countryCode), std::move(countryName));
}
std::ranges::sort(_ipLocationStore, {}, &IpLocationRecord::IpFrom);
ASSERT(std::ranges::is_sorted(_ipLocationStore, [](IpLocationRecord const& a, IpLocationRecord const& b) { return a.IpFrom < b.IpTo; }),
"Overlapping IP ranges detected in database file");
databaseFile.close();
TC_LOG_INFO("server.loading", ">> Loaded {} ip location entries.", _ipLocationStore.size());
}
IpLocationRecord const* IpLocationStore::GetLocationRecord(std::string const& ipAddress) const
{
boost::system::error_code error;
boost::asio::ip::address address = Trinity::Net::make_address(ipAddress, error);
if (error)
return nullptr;
std::array<uint8, 16> bytes = [&]() -> std::array<uint8, 16>
{
if (address.is_v6())
return address.to_v6().to_bytes();
if (address.is_v4())
return Trinity::Net::make_address_v6(Trinity::Net::v4_mapped, address.to_v4()).to_bytes();
return {};
}();
auto itr = std::ranges::upper_bound(_ipLocationStore, bytes, {}, &IpLocationRecord::IpTo);
if (itr == _ipLocationStore.end())
return nullptr;
if (bytes < itr->IpFrom)
return nullptr;
return &(*itr);
}
IpLocationStore* IpLocationStore::Instance()
{
static IpLocationStore instance;
return &instance;
}
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