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C++

// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012-2017 OpenVPN Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License Version 3
// as published by the Free Software Foundation.
//
// 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program in the COPYING file.
// If not, see <http://www.gnu.org/licenses/>.
// Get the local MAC addr of the interface that owns the default route
#ifndef OPENVPN_NETCONF_HWADDR_H
#define OPENVPN_NETCONF_HWADDR_H
#include <string>
#include <openvpn/common/platform.hpp>
#include <openvpn/addr/macaddr.hpp>
#if defined(OPENVPN_PLATFORM_WIN) && !defined(OPENVPN_PLATFORM_UWP)
#include <openvpn/tun/win/tunutil.hpp>
#elif defined(OPENVPN_PLATFORM_MAC)
#include <openvpn/tun/mac/gwv4.hpp>
#elif defined(TARGET_OS_IPHONE)
#include <UIKit/UIKit.h>
#endif
namespace openvpn {
inline std::string get_hwaddr()
{
#if defined(OPENVPN_PLATFORM_WIN) && !defined(OPENVPN_PLATFORM_UWP)
const TunWin::Util::DefaultGateway dg;
if (dg.defined())
{
const TunWin::Util::IPAdaptersInfo ai_list;
const IP_ADAPTER_INFO* ai = ai_list.adapter(dg.interface_index());
if (ai)
{
const MACAddr mac(ai->Address);
return mac.to_string();
}
}
#elif defined(OPENVPN_PLATFORM_MAC)
const MacGatewayInfoV4 gw;
if (gw.hwaddr_defined())
{
const MACAddr& mac = gw.hwaddr();
return mac.to_string();
}
#elif defined(TARGET_OS_IPHONE)
// as reported at https://developer.apple.com/library/content/releasenotes/General/WhatsNewIniOS/Articles/iOS7.html#//apple_ref/doc/uid/TP40013162-SW34
// we can't get the MAC address from iOS for privacy reasons, but we can
// use the UUID as unique identifier. It is unique among the App domain,
// meaning that a different app will get a different UUID from this call
const NSString *uuid = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
return std::string([uuid UTF8String]);
#endif
return std::string();
}
}
#endif