// 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) 2012-2020 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::BestGateway 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