Put kext back in Mac distro and use on versions older than High Sierra (which lack the feth device)

osdep/EthernetTap.cpp

@@ -0,0 +1,117 @@
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2019  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/>.
+ *
+ * --
+ *
+ * You can be released from the requirements of the license by purchasing
+ * a commercial license. Buying such a license is mandatory as soon as you
+ * develop commercial closed-source software that incorporates or links
+ * directly against ZeroTier software without disclosing the source code
+ * of your own application.
+ */
+
+#include "EthernetTap.hpp"
+#include "OSUtils.hpp"
+
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef __APPLE__
+#include <errno.h>
+#include <sys/sysctl.h>
+#include "MacEthernetTap.hpp"
+#include "MacKextEthernetTap.hpp"
+#endif // __APPLE__
+
+#ifdef __LINUX__
+#include "LinuxEthernetTap.hpp"
+#endif // __LINUX__
+
+#ifdef __WINDOWS__
+#include "WindowsEthernetTap.hpp"
+#endif // __WINDOWS__
+
+#ifdef __FreeBSD__
+#include "BSDEthernetTap.hpp"
+#endif // __FreeBSD__
+
+#ifdef __NetBSD__
+#include "NetBSDEthernetTap.hpp"
+#endif // __NetBSD__
+
+#ifdef __OpenBSD__
+#include "BSDEthernetTap.hpp"
+#endif // __OpenBSD__
+
+namespace ZeroTier {
+
+std::shared_ptr<EthernetTap> EthernetTap::newInstance(
+	const char *tapDeviceType, // OS-specific, NULL for default
+	const char *homePath,
+	const MAC &mac,
+	unsigned int mtu,
+	unsigned int metric,
+	uint64_t nwid,
+	const char *friendlyName,
+	void (*handler)(void *,void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int),
+	void *arg)
+{
+#ifdef __APPLE__
+	char osrelease[256];
+	size_t size = sizeof(osrelease);
+	if (sysctlbyname("kern.osrelease",osrelease,&size,nullptr,0) == 0) {
+		char *dotAt = strchr(osrelease,'.');
+		if (dotAt) {
+			*dotAt = (char)0;
+			// The "feth" virtual Ethernet device type appeared in Darwin 17.x.x. Older versions
+			// (Sierra and earlier) must use the a kernel extension.
+			if (strtol(osrelease,(char **)0,10) < 17) {
+				return std::shared_ptr<EthernetTap>(new MacKextEthernetTap(homePath,mac,mtu,metric,nwid,friendlyName,handler,arg));
+			} else {
+				return std::shared_ptr<EthernetTap>(new MacEthernetTap(homePath,mac,mtu,metric,nwid,friendlyName,handler,arg));
+			}
+		}
+	}
+#endif // __APPLE__
+
+#ifdef __LINUX__
+	return std::shared_ptr<EthernetTap>(new LinuxEthernetTap(homePath,mac,mtu,metric,nwid,friendlyName,handler,arg));
+#endif // __LINUX__
+
+#ifdef __WINDOWS__
+	return std::shared_ptr<EthernetTap>(new WindowsEthernetTap(homePath,mac,mtu,metric,nwid,friendlyName,handler,arg));
+#endif // __WINDOWS__
+
+#ifdef __FreeBSD__
+	return std::shared_ptr<EthernetTap>(new BSDEthernetTap(homePath,mac,mtu,metric,nwid,friendlyName,handler,arg));
+#endif // __FreeBSD__
+
+#ifdef __NetBSD__
+	return std::shared_ptr<EthernetTap>(new NetBSDEthernetTap(homePath,mac,mtu,metric,nwid,friendlyName,handler,arg));
+#endif // __NetBSD__
+
+#ifdef __OpenBSD__
+	return std::shared_ptr<EthernetTap>(new BSDEthernetTap(homePath,mac,mtu,metric,nwid,friendlyName,handler,arg));
+#endif // __OpenBSD__
+
+	return std::shared_ptr<EthernetTap>();
+}
+
+EthernetTap::EthernetTap() {}
+EthernetTap::~EthernetTap() {}
+
+} // namespace ZeroTier