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#include "stdafx.h"
#include "context.h"
#include <libcommon/string.h>
#include <libcommon/wmi/connection.h>
#include <libcommon/wmi/resultset.h>
#include <libcommon/wmi/wmi.h>
#include <log/log.h>
#include <vector>
#include <stdexcept>
#include <algorithm>
#include <memory>
#include <sstream>
using namespace common;
namespace
{
std::vector<std::wstring> BlockToRows(const std::wstring &textBlock)
{
//
// This is such a hack :-(
//
// It only works because the tokenizer is greedy and because we don't care about
// empty lines for this usage.
//
return common::string::Tokenize(textBlock, L"\r\n");
}
void LogAllAdapters(wmi::Connection &connection)
{
auto resultset = connection.query(L"SELECT * from Win32_NetworkAdapter");
struct NetworkAdapter
{
size_t interfaceIndex;
std::wstring manufacturer;
std::wstring name;
std::wstring pnpDeviceId;
std::wstring alias;
};
std::vector<NetworkAdapter> adapters;
//
// Find all adapters and extract the most important data.
//
auto StringOrNa = [](const _variant_t &variant)
{
if (VT_BSTR == V_VT(&variant))
{
return std::wstring(V_BSTR(&variant));
}
return std::wstring(L"n/a");
};
while(resultset.advance())
{
auto interfaceIndex = wmi::WmiGetPropertyAlways(resultset.result(), L"InterfaceIndex");
auto manufacturer = wmi::WmiGetProperty(resultset.result(), L"Manufacturer");
auto name = wmi::WmiGetProperty(resultset.result(), L"Name");
auto pnpDeviceId = wmi::WmiGetProperty(resultset.result(), L"PNPDeviceID");
auto alias = wmi::WmiGetProperty(resultset.result(), L"NetConnectionID");
NetworkAdapter adapter;
adapter.interfaceIndex = static_cast<size_t>(V_UI8(&interfaceIndex));
adapter.manufacturer = StringOrNa(manufacturer);
adapter.name = StringOrNa(name);
adapter.pnpDeviceId = StringOrNa(pnpDeviceId);
adapter.alias = StringOrNa(alias);
adapters.emplace_back(adapter);
}
//
// Flatten the adapter information so we can log it more easily.
//
std::vector<std::wstring> details;
for (const auto &adapter : adapters)
{
details.emplace_back(L"Adapter");
{
std::wstringstream ss;
ss << L" InterfaceIndex: " << adapter.interfaceIndex;
details.emplace_back(ss.str());
}
details.emplace_back(std::wstring(L" Manufacturer: ").append(adapter.manufacturer));
details.emplace_back(std::wstring(L" Name: ").append(adapter.name));
details.emplace_back(std::wstring(L" PnpDeviceId: ").append(adapter.pnpDeviceId));
details.emplace_back(std::wstring(L" Alias: ").append(adapter.alias));
}
PluginLogWithDetails(L"Adapters known to WMI", details);
}
} // anonymous namespace
Context::BaselineStatus Context::establishBaseline(const std::wstring &textBlock)
{
m_baseline = ParseVirtualNics(textBlock);
if (m_baseline.empty())
{
return BaselineStatus::NO_INTERFACES_PRESENT;
}
for (const auto &nic : m_baseline)
{
if (0 == _wcsicmp(nic.alias.c_str(), L"mullvad"))
{
return BaselineStatus::MULLVAD_INTERFACE_PRESENT;
}
}
return BaselineStatus::SOME_INTERFACES_PRESENT;
}
void Context::recordCurrentState(const std::wstring &textBlock)
{
m_currentState = ParseVirtualNics(textBlock);
}
Context::VirtualNic Context::getNewAdapter()
{
std::vector<VirtualNic> added;
for (const auto &nic : m_currentState)
{
if (m_baseline.end() == m_baseline.find(nic))
{
added.push_back(nic);
}
}
if (added.size() != 1)
{
throw std::runtime_error("Unable to identify newly added virtual adapter");
}
return added[0];
}
//static
std::set<Context::VirtualNic> Context::ParseVirtualNics(const std::wstring &textBlock)
{
// ROOT\NET\0000
// Name: TAP - Windows Adapter V9
// Hardware IDs :
// tap0901
// 1 matching device(s) found.
std::set<VirtualNic> nics;
auto text = BlockToRows(textBlock);
size_t line = 0;
while (nullptr != wcschr(text.at(line).c_str(), L'\\'))
{
auto nameDelimiter = wcschr(text.at(line + 1).c_str(), L':');
if (nullptr == nameDelimiter)
{
throw std::runtime_error("Unexpected formatting in input data");
}
VirtualNic nic;
nic.node = text.at(line);
nic.name = std::wstring(nameDelimiter + 2);
nic.alias = GetNicAlias(nic.name);
nics.emplace(std::move(nic));
line += 4;
}
return nics;
}
//static
std::wstring Context::GetNicAlias(const std::wstring &name)
{
static wmi::Connection connection(wmi::Connection::Namespace::Cimv2);
std::wstringstream ss;
ss << L"SELECT * from Win32_NetworkAdapter WHERE Name = \"" << name << L"\"";
auto resultset = connection.query(ss.str().c_str());
if (false == resultset.advance())
{
PluginLog(std::wstring(L"WMI query failed for adapter: ").append(name));
LogAllAdapters(connection);
throw std::runtime_error("Unable to look up virtual adapter using WMI");
}
auto alias = wmi::WmiGetPropertyAlways(resultset.result(), L"NetConnectionID");
return V_BSTR(&alias);
}
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