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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2015 ZeroTier, Inc.
*
* 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/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#include "WindowsEthernetTapFactory.hpp"
#include "WindowsEthernetTap.hpp"
namespace ZeroTier {
WindowsEthernetTapFactory::Env::Env()
{
#ifdef _WIN64
is64Bit = TRUE;
devcon = "\\devcon_x64.exe";
tapDriver = "\\tap-windows\\x64\\zttap200.inf";
#else
is64Bit = FALSE;
IsWow64Process(GetCurrentProcess(),&is64Bit);
devcon = ((is64Bit == TRUE) ? "\\devcon_x64.exe" : "\\devcon_x86.exe");
tapDriver = ((is64Bit == TRUE) ? "\\tap-windows\\x64\\zttap200.inf" : "\\tap-windows\\x86\\zttap200.inf");
#endif
}
const WindowsEthernetTapFactory::Env WindowsEthernetTapFactory::WINENV;
WindowsEthernetTapFactory::WindowsEthernetTapFactory(const char *pathToHelpers) :
_pathToHelpers(pathToHelpers)
{
}
WindowsEthernetTapFactory::~WindowsEthernetTapFactory()
{
Mutex::Lock _l(_devices_m);
for(std::vector<EthernetTap *>::iterator d(_devices.begin());d!=_devices.end();++d)
delete *d;
}
EthernetTap *WindowsEthernetTapFactory::open(
const MAC &mac,
unsigned int mtu,
unsigned int metric,
uint64_t nwid,
const char *desiredDevice,
const char *friendlyName,
void (*handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &),
void *arg)
{
Mutex::Lock _l(_devices_m);
EthernetTap *t = new WindowsEthernetTap(_pathToHelpers.c_str(),mac,mtu,metric,nwid,desiredDevice,friendlyName,handler,arg);
_devices.push_back(t);
return t;
}
void WindowsEthernetTapFactory::close(EthernetTap *tap,bool destroyPersistentDevices)
{
if (!tap)
return;
std::string instanceId(((WindowsEthernetTap *)tap)->instanceId());
Mutex::Lock _l(_devices_m);
for(std::vector<EthernetTap *>::iterator d(_devices.begin());d!=_devices.end();++d) {
if (*d == tap) {
_devices.erase(d);
break;
}
}
delete tap;
if (destroyPersistentDevices)
_deletePersistentTapDevice(_pathToHelpers.c_str(),instanceId.c_str());
}
void WindowsEthernetTapFactory::destroyAllPersistentTapDevices(const char *pathToHelpers)
{
char subkeyName[4096];
char subkeyClass[4096];
char data[4096];
std::set<std::string> instanceIdPathsToRemove;
{
HKEY nwAdapters;
if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,"SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}",0,KEY_READ|KEY_WRITE,&nwAdapters) != ERROR_SUCCESS)
return;
for(DWORD subkeyIndex=0;;++subkeyIndex) {
DWORD type;
DWORD dataLen;
DWORD subkeyNameLen = sizeof(subkeyName);
DWORD subkeyClassLen = sizeof(subkeyClass);
FILETIME lastWriteTime;
if (RegEnumKeyExA(nwAdapters,subkeyIndex,subkeyName,&subkeyNameLen,(DWORD *)0,subkeyClass,&subkeyClassLen,&lastWriteTime) == ERROR_SUCCESS) {
type = 0;
dataLen = sizeof(data);
if (RegGetValueA(nwAdapters,subkeyName,"ComponentId",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS) {
data[dataLen] = '\0';
if (!strnicmp(data,"zttap",5)) {
std::string instanceIdPath;
type = 0;
dataLen = sizeof(data);
if (RegGetValueA(nwAdapters,subkeyName,"DeviceInstanceID",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS)
instanceIdPath.assign(data,dataLen);
if (instanceIdPath.length() != 0)
instanceIdPathsToRemove.insert(instanceIdPath);
}
}
} else break; // end of list or failure
}
RegCloseKey(nwAdapters);
}
for(std::set<std::string>::iterator iidp(instanceIdPathsToRemove.begin());iidp!=instanceIdPathsToRemove.end();++iidp)
_deletePersistentTapDevice(pathToHelpers,iidp->c_str());
}
void WindowsEthernetTapFactory::_deletePersistentTapDevice(const char *pathToHelpers,const char *instanceId)
{
HANDLE devconLog = CreateFileA((std::string(pathToHelpers) + "\\devcon.log").c_str(),GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
STARTUPINFOA startupInfo;
startupInfo.cb = sizeof(startupInfo);
if (devconLog != INVALID_HANDLE_VALUE) {
SetFilePointer(devconLog,0,0,FILE_END);
startupInfo.hStdOutput = devconLog;
startupInfo.hStdError = devconLog;
}
PROCESS_INFORMATION processInfo;
memset(&startupInfo,0,sizeof(STARTUPINFOA));
memset(&processInfo,0,sizeof(PROCESS_INFORMATION));
if (CreateProcessA(NULL,(LPSTR)(std::string("\"") + pathToHelpers + WINENV.devcon + "\" remove @" + instanceId).c_str(),NULL,NULL,FALSE,0,NULL,NULL,&startupInfo,&processInfo)) {
WaitForSingleObject(processInfo.hProcess,INFINITE);
CloseHandle(processInfo.hProcess);
CloseHandle(processInfo.hThread);
}
if (devconLog != INVALID_HANDLE_VALUE)
CloseHandle(devconLog);
}
} // namespace ZeroTier
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