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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2016 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/>.
*/
#ifndef ZT_WINDOWSETHERNETTAP_HPP
#define ZT_WINDOWSETHERNETTAP_HPP
#include <stdio.h>
#include <stdlib.h>
#include <ifdef.h>
#include <string>
#include <queue>
#include <stdexcept>
#include "../node/Constants.hpp"
#include "../node/Mutex.hpp"
#include "../node/Array.hpp"
#include "../node/MulticastGroup.hpp"
#include "../node/InetAddress.hpp"
#include "../osdep/Thread.hpp"
namespace ZeroTier {
class WindowsEthernetTap
{
public:
/**
* Installs a new instance of the ZT tap driver
*
* @param pathToInf Path to zttap driver .inf file
* @param deviceInstanceId Buffer to fill with device instance ID on success (and if SetupDiGetDeviceInstanceIdA succeeds, which it should)
* @return Empty string on success, otherwise an error message
*/
static std::string addNewPersistentTapDevice(const char *pathToInf,std::string &deviceInstanceId);
/**
* Uninstalls all persistent tap devices that have legacy drivers
*
* @return Empty string on success, otherwise an error message
*/
static std::string destroyAllLegacyPersistentTapDevices();
/**
* Uninstalls all persistent tap devices on the system
*
* @return Empty string on success, otherwise an error message
*/
static std::string destroyAllPersistentTapDevices();
/**
* Uninstall a specific persistent tap device by instance ID
*
* @param instanceId Device instance ID
* @return Empty string on success, otherwise an error message
*/
static std::string deletePersistentTapDevice(const char *instanceId);
/**
* Disable a persistent tap device by instance ID
*
* @param instanceId Device instance ID
* @param enabled Enable device?
* @return True if device was found and disabled
*/
static bool setPersistentTapDeviceState(const char *instanceId,bool enabled);
WindowsEthernetTap(
const char *hp,
const MAC &mac,
unsigned int mtu,
unsigned int metric,
uint64_t nwid,
const char *friendlyName,
void (*handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int),
void *arg);
~WindowsEthernetTap();
void setEnabled(bool en);
bool enabled() const;
bool addIp(const InetAddress &ip);
bool removeIp(const InetAddress &ip);
std::vector<InetAddress> ips() const;
void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
std::string deviceName() const;
void setFriendlyName(const char *friendlyName);
void scanMulticastGroups(std::vector<MulticastGroup> &added,std::vector<MulticastGroup> &removed);
inline const NET_LUID &luid() const { return _deviceLuid; }
inline const GUID &guid() const { return _deviceGuid; }
inline const std::string &instanceId() const { return _deviceInstanceId; }
void threadMain()
throw();
private:
NET_IFINDEX _getDeviceIndex(); // throws on failure
std::vector<std::string> _getRegistryIPv4Value(const char *regKey);
void _setRegistryIPv4Value(const char *regKey,const std::vector<std::string> &value);
void _syncIps();
void (*_handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int);
void *_arg;
MAC _mac;
uint64_t _nwid;
Thread _thread;
volatile HANDLE _tap;
HANDLE _injectSemaphore;
GUID _deviceGuid;
NET_LUID _deviceLuid;
std::string _netCfgInstanceId;
std::string _deviceInstanceId;
std::vector<InetAddress> _assignedIps; // IPs assigned with addIp
Mutex _assignedIps_m;
std::vector<MulticastGroup> _multicastGroups;
std::queue< std::pair< Array<char,ZT_IF_MTU + 32>,unsigned int > > _injectPending;
Mutex _injectPending_m;
std::string _pathToHelpers;
volatile bool _run;
volatile bool _initialized;
volatile bool _enabled;
};
} // namespace ZeroTier
#endif
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