A bunch more osdep/ work...

node/EthernetTap.hpp

@@ -48,6 +48,13 @@ namespace ZeroTier {
  */
 class EthernetTap : NonCopyable
 {
+protected:
+	EthernetTap(const char *cn,const MAC &m,unsigned int mt,unsigned int met) :
+		_implName(cn),
+		_mac(m),
+		_mtu(mt),
+		_metric(met) {}
+
 public:
 	virtual ~EthernetTap() {}
 
@@ -188,12 +195,6 @@ public:
 	virtual bool updateMulticastGroups(std::set<MulticastGroup> &groups) = 0;
 
 protected:
-	EthernetTap(const char *cn,const MAC &m,unsigned int mt,unsigned int met) :
-		_implName(cn),
-		_mac(m),
-		_mtu(mt),
-		_metric(met) {}
-
 	const char *_implName;
 	MAC _mac;
 	unsigned int _mtu;

node/EthernetTapFactory.hpp

@@ -31,8 +31,12 @@
 #include <stdint.h>
 
 #include <stdexcept>
+#include <vector>
+#include <string>
 
 #include "MAC.hpp"
+#include "NonCopyable.hpp"
+#include "Buffer.hpp"
 
 namespace ZeroTier {
 
@@ -49,7 +53,7 @@ class EthernetTap;
  * as well as moving toward a design that makes unit testing the entire app
  * quite a bit easier.
  */
-class EthernetTapFactory
+class EthernetTapFactory : NonCopyable
 {
 public:
 	EthernetTapFactory() {}
@@ -90,6 +94,11 @@ public:
 	 * @param tap Tap instance
 	 */
 	virtual void close(EthernetTap *tap) = 0;
+
+	/**
+	 * @return All currently open tap device names
+	 */
+	virtual std::vector<std::string> allTapDeviceNames() const = 0;
 };
 
 } // namespace ZeroTier

node/osdep/BSDRoutingTable.cpp

@@ -43,7 +43,7 @@
 #include <algorithm>
 #include <utility>
 
-#include "Constants.hpp"
+#include "../Constants.hpp"
 #include "BSDRoutingTable.hpp"
 
 // All I wanted was the bloody rounting table. I didn't expect the Spanish inquisition.
@@ -115,6 +115,9 @@ std::vector<RoutingTable::Entry> BSDRoutingTable::get(bool includeLinkLocal,bool
 										// Nobody expects the Spanish inquisition!
 										if ((sin6->sin6_addr.s6_addr[0] == 0xfe)&&((sin6->sin6_addr.s6_addr[1] & 0xc0) == 0x80)) {
 											// Our chief weapon is... in-band signaling!
+											// Seriously who in the living fuck thought this was a good idea and
+											// then had the sadistic idea to not document it anywhere? Of course it's
+											// not like there is any documentation on BSD sysctls anyway.
 											unsigned int interfaceIndex = ((((unsigned int)sin6->sin6_addr.s6_addr[2]) << 8) & 0xff) | (((unsigned int)sin6->sin6_addr.s6_addr[3]) & 0xff);
 											sin6->sin6_addr.s6_addr[2] = 0;
 											sin6->sin6_addr.s6_addr[3] = 0;

node/osdep/BSDRoutingTable.hpp

@@ -28,7 +28,7 @@
 #ifndef ZT_BSDROUTINGTABLE_HPP
 #define ZT_BSDROUTINGTABLE_HPP
 
-#include "RoutingTable.hpp"
+#include "../RoutingTable.hpp"
 
 namespace ZeroTier {
 

node/osdep/LinuxEthernetTap.cpp

@@ -215,8 +215,6 @@ LinuxEthernetTap::LinuxEthernetTap(
 
 	::pipe(_shutdownSignalPipe);
 
-	TRACE("tap %s created",_dev.c_str());
-
 	_thread = Thread::start(this);
 }
 
@@ -341,22 +339,14 @@ std::set<InetAddress> LinuxEthernetTap::ips() const
 
 void LinuxEthernetTap::put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len)
 {
-	char putBuf[4096 + 14];
-	if ((_fd > 0)&&(len <= _mtu)) {
+	char putBuf[8194];
+	if ((_fd > 0)&&(len <= _mtu)&&(_enabled)) {
 		to.copyTo(putBuf,6);
 		from.copyTo(putBuf + 6,6);
 		*((uint16_t *)(putBuf + 12)) = htons((uint16_t)etherType);
 		memcpy(putBuf + 14,data,len);
 		len += 14;
-
-		int n = ::write(_fd,putBuf,len);
-		if (n <= 0) {
-			LOG("error writing packet to Ethernet tap device: %s",strerror(errno));
-		} else if (n != (int)len) {
-			// Saw this gremlin once, so log it if we see it again... OSX tap
-			// or something seems to have goofy issues with certain MTUs.
-			LOG("ERROR: write underrun: %s tap write() wrote %d of %u bytes of frame",_dev.c_str(),n,len);
-		}
+		::write(_fd,putBuf,len);
 	}
 }
 
@@ -465,13 +455,15 @@ void LinuxEthernetTap::threadMain()
 				if (r > 14) {
 					if (r > ((int)_mtu + 14)) // sanity check for weird TAP behavior on some platforms
 						r = _mtu + 14;
-					to.setTo(getBuf,6);
-					from.setTo(getBuf + 6,6);
-					unsigned int etherType = ntohs(((const uint16_t *)getBuf)[6]);
-					if (etherType != 0x8100) { // VLAN tagged frames are not supported!
+
+					if (_enabled) {
+						to.setTo(getBuf,6);
+						from.setTo(getBuf + 6,6);
+						unsigned int etherType = ntohs(((const uint16_t *)getBuf)[6]);
 						data.copyFrom(getBuf + 14,(unsigned int)r - 14);
 						_handler(_arg,from,to,etherType,data);
 					}
+
 					r = 0;
 				}
 			}

node/osdep/LinuxEthernetTapFactory.cpp

@@ -0,0 +1,83 @@
+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2011-2014  ZeroTier Networks LLC
+ *
+ * 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 "LinuxEthernetTapFactory.hpp"
+#include "LinuxEthernetTap.hpp"
+
+namespace ZeroTier {
+
+LinuxEthernetTapFactory::LinuxEthernetTapFactory()
+{
+}
+
+LinuxEthernetTapFactory::~LinuxEthernetTapFactory()
+{
+	Mutex::Lock _l(_devices_m);
+	for(std::vector<EthernetTap *>::iterator d(_devices.begin());d!=_devices.end();++d)
+		delete *d;
+}
+
+EthernetTap *LinuxEthernetTapFactory::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 LinuxEthernetTap(mac,mtu,metric,nwid,desiredDevice,friendlyName,handler,arg);
+	_devices.push_back(t);
+	return t;
+}
+
+void LinuxEthernetTapFactory::close(EthernetTap *tap)
+{
+	{
+		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;
+}
+
+std::vector<std::string> allTapDeviceNames() const
+{
+	std::vector<std::string> dn;
+	Mutex::Lock _l(_devices_m);
+	for(std::vector<EthernetTap *>::const_iterator d(_devices.begin());d!=_devices.end();++d)
+		dn.push_back(d->deviceName());
+	return dn;
+}
+
+} // namespace ZeroTier

node/osdep/LinuxEthernetTapFactory.hpp

@@ -0,0 +1,64 @@
+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2011-2014  ZeroTier Networks LLC
+ *
+ * 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/
+ */
+
+#ifndef ZT_LINUXETHERNETTAPFACTORY_HPP
+#define ZT_LINUXETHERNETTAPFACTORY_HPP
+
+#include <vector>
+#include <string>
+
+#include "../EthernetTapFactory.hpp"
+#include "../Mutex.hpp"
+
+namespace ZeroTier {
+
+class LinuxEthernetTapFactory : public EthernetTapFactory
+{
+public:
+	LinuxEthernetTapFactory();
+	virtual ~LinuxEthernetTapFactory();
+
+	virtual EthernetTap *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);
+	virtual void close(EthernetTap *tap);
+	virtual std::vector<std::string> allTapDeviceNames() const;
+
+private:
+	std::vector<EthernetTap *> _devices;
+	Mutex _devices_m;
+};
+
+} // namespace ZeroTier
+
+#endif

node/osdep/OSXEthernetTap.cpp

@@ -328,28 +328,12 @@ OSXEthernetTap::OSXEthernetTap(
 	_fd(0),
 	_enabled(true)
 {
-	char devpath[64],ethaddr[64],mtustr[16],tmp[4096];
+	char devpath[64],ethaddr[64],mtustr[32],metstr[32];
 	struct stat stattmp;
 	Mutex::Lock _l(__tapCreateLock); // create only one tap at a time, globally
 
 	if (mtu > 2800)
 		throw std::runtime_error("max tap MTU is 2800");
-
-	// Check for existence of ZT tap devices, try to load module if not there
-	const char *kextload = UNIX_COMMANDS[ZT_MAC_KEXTLOAD_COMMAND];
-	if ((stat("/dev/zt0",&stattmp))&&(kextload)) {
-		strcpy(tmp,_r->homePath.c_str());
-		long kextpid = (long)vfork();
-		if (kextpid == 0) {
-			chdir(tmp);
-			execl(kextload,kextload,"-q","-repository",tmp,"tap.kext",(const char *)0);
-			_exit(-1);
-		} else if (kextpid > 0) {
-			int exitcode = -1;
-			waitpid(kextpid,&exitcode,0);
-			usleep(500);
-		} else throw std::runtime_error("unable to create subprocess with fork()");
-	}
 	if (stat("/dev/zt0",&stattmp))
 		throw std::runtime_error("/dev/zt# tap devices do not exist and unable to load kernel extension");
 
@@ -390,22 +374,17 @@ OSXEthernetTap::OSXEthernetTap(
 		throw std::runtime_error("unable to set flags on file descriptor for TAP device");
 	}
 
-	const char *ifconfig = UNIX_COMMANDS[ZT_UNIX_IFCONFIG_COMMAND];
-	if (!ifconfig) {
-		::close(_fd);
-		throw std::runtime_error("unable to find 'ifconfig' command on system");
-	}
-
 	// Configure MAC address and MTU, bring interface up
 	Utils::snprintf(ethaddr,sizeof(ethaddr),"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",(int)mac[0],(int)mac[1],(int)mac[2],(int)mac[3],(int)mac[4],(int)mac[5]);
-	Utils::snprintf(mtustr,sizeof(mtustr),"%u",mtu);
-	long cpid;
-	if ((cpid = (long)vfork()) == 0) {
-		execl(ifconfig,ifconfig,_dev.c_str(),"lladdr",ethaddr,"mtu",mtustr,"up",(const char *)0);
-		_exit(-1);
-	} else {
+	Utils::snprintf(mtustr,sizeof(mtustr),"%u",_mtu);
+	Utils::snprintf(metstr,sizeof(metstr),"%u",_metric)
+	long cpid = (long)vfork();
+	if (cpid == 0) {
+		::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),"lladdr",ethaddr,"mtu",mtustr,"metric",metstr,"up",(const char *)0);
+		::_exit(-1);
+	} else if (cpid > 0) {
 		int exitcode = -1;
-		waitpid(cpid,&exitcode,0);
+		::waitpid(cpid,&exitcode,0);
 		if (exitcode) {
 			::close(_fd);
 			throw std::runtime_error("ifconfig failure setting link-layer address and activating tap interface");
@@ -420,10 +399,6 @@ OSXEthernetTap::OSXEthernetTap(
 	::pipe(_shutdownSignalPipe);
 
 	_thread = Thread::start(this);
-
-	EthernetTap_instances_m.lock();
-	++EthernetTap_instances;
-	EthernetTap_instances_m.unlock();
 }
 
 OSXEthernetTap::~OSXEthernetTap()
@@ -433,27 +408,6 @@ OSXEthernetTap::~OSXEthernetTap()
 	::close(_fd);
 	::close(_shutdownSignalPipe[0]);
 	::close(_shutdownSignalPipe[1]);
-
-	EthernetTap_instances_m.lock();
-	int instances = --EthernetTap_instances;
-	EthernetTap_instances_m.unlock();
-	if (instances <= 0) {
-		// Unload OSX kernel extension on the deletion of the last EthernetTap
-		// instance.
-		const char *kextunload = UNIX_COMMANDS[ZT_MAC_KEXTUNLOAD_COMMAND];
-		if (kextunload) {
-			char tmp[4096];
-			sprintf(tmp,"%s/tap.kext",_r->homePath.c_str());
-			long kextpid = (long)vfork();
-			if (kextpid == 0) {
-				execl(kextunload,kextunload,tmp,(const char *)0);
-				_exit(-1);
-			} else if (kextpid > 0) {
-				int exitcode = -1;
-				waitpid(kextpid,&exitcode,0);
-			}
-		}
-	}
 }
 
 void OSXEthernetTap::setEnabled(bool en)
@@ -469,14 +423,11 @@ bool OSXEthernetTap::enabled() const
 
 static bool ___removeIp(const std::string &_dev,const InetAddress &ip)
 {
-	const char *ifconfig = UNIX_COMMANDS[ZT_UNIX_IFCONFIG_COMMAND];
-	if (!ifconfig)
-		return false;
-	long cpid;
-	if ((cpid = (long)vfork()) == 0) {
-		execl(ifconfig,ifconfig,_dev.c_str(),"inet",ip.toIpString().c_str(),"-alias",(const char *)0);
+	long cpid = (long)vfork();
+	if (cpid == 0) {
+		execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),"inet",ip.toIpString().c_str(),"-alias",(const char *)0);
 		_exit(-1);
-	} else {
+	} else (cpid > 0) {
 		int exitcode = -1;
 		waitpid(cpid,&exitcode,0);
 		return (exitcode == 0);
@@ -486,12 +437,6 @@ static bool ___removeIp(const std::string &_dev,const InetAddress &ip)
 
 bool OSXEthernetTap::addIP(const InetAddress &ip)
 {
-	const char *ifconfig = UNIX_COMMANDS[ZT_UNIX_IFCONFIG_COMMAND];
-	if (!ifconfig) {
-		LOG("ERROR: could not configure IP address for %s: unable to find 'ifconfig' command on system (checked /sbin, /bin, /usr/sbin, /usr/bin)",_dev.c_str());
-		return false;
-	}
-
 	if (!ip)
 		return false;
 
@@ -510,16 +455,15 @@ bool OSXEthernetTap::addIP(const InetAddress &ip)
 		}
 	}
 
-	long cpid;
-	if ((cpid = (long)vfork()) == 0) {
-		execl(ifconfig,ifconfig,_dev.c_str(),ip.isV4() ? "inet" : "inet6",ip.toString().c_str(),"alias",(const char *)0);
-		_exit(-1);
-	} else {
+	long cpid = (long)vfork();
+	if (cpid == 0) {
+		::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),ip.isV4() ? "inet" : "inet6",ip.toString().c_str(),"alias",(const char *)0);
+		::_exit(-1);
+	} else if (cpid > 0) {
 		int exitcode = -1;
-		waitpid(cpid,&exitcode,0);
+		::waitpid(cpid,&exitcode,0);
 		return (exitcode == 0);
 	}
-
 	return false;
 }
 
@@ -569,22 +513,14 @@ std::set<InetAddress> OSXEthernetTap::ips() const
 
 void OSXEthernetTap::put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len)
 {
-	char putBuf[4096 + 14];
-	if ((_fd > 0)&&(len <= _mtu)) {
+	char putBuf[4096];
+	if ((_fd > 0)&&(len <= _mtu)&&(_enabled)) {
 		to.copyTo(putBuf,6);
 		from.copyTo(putBuf + 6,6);
 		*((uint16_t *)(putBuf + 12)) = htons((uint16_t)etherType);
 		memcpy(putBuf + 14,data,len);
 		len += 14;
-
-		int n = ::write(_fd,putBuf,len);
-		if (n <= 0) {
-			LOG("error writing packet to Ethernet tap device: %s",strerror(errno));
-		} else if (n != (int)len) {
-			// Saw this gremlin once, so log it if we see it again... OSX tap
-			// or something seems to have goofy issues with certain MTUs.
-			LOG("ERROR: write underrun: %s tap write() wrote %d of %u bytes of frame",_dev.c_str(),n,len);
-		}
+		::write(_fd,putBuf,len);
 	}
 }
 
@@ -669,10 +605,8 @@ void OSXEthernetTap::threadMain()
 		if (FD_ISSET(_fd,&readfds)) {
 			n = (int)::read(_fd,getBuf + r,sizeof(getBuf) - r);
 			if (n < 0) {
-				if ((errno != EINTR)&&(errno != ETIMEDOUT)) {
-					TRACE("unexpected error reading from tap: %s",strerror(errno));
+				if ((errno != EINTR)&&(errno != ETIMEDOUT))
 					break;
-				}
 			} else {
 				// Some tap drivers like to send the ethernet frame and the
 				// payload in two chunks, so handle that by accumulating
@@ -681,13 +615,15 @@ void OSXEthernetTap::threadMain()
 				if (r > 14) {
 					if (r > ((int)_mtu + 14)) // sanity check for weird TAP behavior on some platforms
 						r = _mtu + 14;
-					to.setTo(getBuf,6);
-					from.setTo(getBuf + 6,6);
-					unsigned int etherType = ntohs(((const uint16_t *)getBuf)[6]);
-					if (etherType != 0x8100) { // VLAN tagged frames are not supported!
+
+					if (_enabled) {
+						to.setTo(getBuf,6);
+						from.setTo(getBuf + 6,6);
+						unsigned int etherType = ntohs(((const uint16_t *)getBuf)[6]);
 						data.copyFrom(getBuf + 14,(unsigned int)r - 14);
 						_handler(_arg,from,to,etherType,data);
 					}
+
 					r = 0;
 				}
 			}

node/osdep/OSXEthernetTapFactory.cpp

@@ -0,0 +1,126 @@
+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2011-2014  ZeroTier Networks LLC
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "OSXEthernetTapFactory.hpp"
+#include "OSXEthernetTap.hpp"
+
+namespace ZeroTier {
+
+OSXEthernetTapFactory::OSXEthernetTapFactory(const char *pathToTapKext,const char *tapKextName)
+	_pathToTapKext((pathToTapKext) ? pathToTapKext : ""),
+	_tapKextName((tapKextName) ? tapKextName : "")
+{
+	struct stat stattmp;
+
+	if ((_pathToTapKext.length())&&(_tapKextName.length())) {
+		if (stat("/dev/zt0",&stattmp)) {
+			long kextpid = (long)vfork();
+			if (kextpid == 0) {
+				::chdir(_pathToTapKext.c_str());
+				::execl("/sbin/kextload","/sbin/kextload","-q","-repository",_pathToTapKext.c_str(),_tapKextName.c_str(),(const char *)0);
+				::_exit(-1);
+			} else if (kextpid > 0) {
+				int exitcode = -1;
+				::waitpid(kextpid,&exitcode,0);
+			} else throw std::runtime_error("unable to create subprocess with fork()");
+		}
+	}
+
+	if (stat("/dev/zt0",&stattmp)) {
+		::usleep(500); // give tap device driver time to start up and try again
+		if (stat("/dev/zt0",&stattmp))
+			throw std::runtime_error("/dev/zt# tap devices do not exist and unable to load kernel extension");
+	}
+}
+
+OSXEthernetTapFactory::~OSXEthernetTapFactory()
+{
+	Mutex::Lock _l(_devices_m);
+	for(std::vector<EthernetTap *>::iterator d(_devices.begin());d!=_devices.end();++d)
+		delete *d;
+
+	if ((_pathToTapKext.length())&&(_tapKextName.length())) {
+		// Attempt to unload kext. If anything else is using a /dev/zt# node, this
+		// fails and the kext stays in the kernel.
+		char tmp[16384];
+		sprintf(tmp,"%s/%s",_pathToTapKext.c_str(),_tapKextName.c_str());
+		long kextpid = (long)vfork();
+		if (kextpid == 0) {
+			::execl("/sbin/kextunload","/sbin/kextunload",tmp,(const char *)0);
+			::_exit(-1);
+		} else if (kextpid > 0) {
+			int exitcode = -1;
+			::waitpid(kextpid,&exitcode,0);
+		}
+	}
+}
+
+EthernetTap *OSXEthernetTapFactory::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 OSXEthernetTap(mac,mtu,metric,nwid,desiredDevice,friendlyName,handler,arg);
+	_devices.push_back(t);
+	return t;
+}
+
+void OSXEthernetTapFactory::close(EthernetTap *tap)
+{
+	{
+		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;
+}
+
+std::vector<std::string> allTapDeviceNames() const
+{
+	std::vector<std::string> dn;
+	Mutex::Lock _l(_devices_m);
+	for(std::vector<EthernetTap *>::const_iterator d(_devices.begin());d!=_devices.end();++d)
+		dn.push_back(d->deviceName());
+	return dn;
+}
+
+} // namespace ZeroTier

node/osdep/OSXEthernetTapFactory.hpp

@@ -0,0 +1,77 @@
+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2011-2014  ZeroTier Networks LLC
+ *
+ * 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/
+ */
+
+#ifndef ZT_LINUXETHERNETTAPFACTORY_HPP
+#define ZT_LINUXETHERNETTAPFACTORY_HPP
+
+#include <vector>
+#include <string>
+
+#include "../EthernetTapFactory.hpp"
+#include "../Mutex.hpp"
+
+namespace ZeroTier {
+
+class OSXEthernetTapFactory : public EthernetTapFactory
+{
+public:
+	/**
+	 * Create OSX ethernet tap factory
+	 *
+	 * If kext paths are specified, an attempt will be made to load the kext
+	 * on launch if not present and unload it on shutdown.
+	 *
+	 * @param pathToTapKext Full path to the location of the tap kext
+	 * @param tapKextName Name of tap kext as found within tap kext path (usually "tap.kext")
+	 * @throws std::runtime_error Tap not available and unable to load kext
+	 */
+	OSXEthernetTapFactory(const char *pathToTapKext,const char *tapKextName);
+
+	virtual ~OSXEthernetTapFactory();
+
+	virtual EthernetTap *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);
+	virtual void close(EthernetTap *tap);
+	virtual std::vector<std::string> allTapDeviceNames() const;
+
+private:
+	std::vector<EthernetTap *> _devices;
+	Mutex _devices_m;
+	std::string _pathToTapKext;
+	std::string _tapKextName;
+};
+
+} // namespace ZeroTier
+
+#endif

node/osdep/WindowsEthernetTap.cpp

@@ -25,7 +25,7 @@
  * LLC. Start here: http://www.zerotier.com/
  */
 
-#include "Constants.hpp"
+#include "../Constants.hpp"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -42,12 +42,10 @@
 #include <nldef.h>
 #include <netioapi.h>
 
-#include "EthernetTap.hpp"
+#include "../EthernetTap.hpp"
+#include "../Utils.hpp"
+#include "../Mutex.hpp"
 #include "WindowsEthernetTap.hpp"
-#include "Logger.hpp"
-#include "RuntimeEnvironment.hpp"
-#include "Utils.hpp"
-#include "Mutex.hpp"
 
 #include "..\windows\TapDriver\tap-windows.h"
 

node/osdep/WindowsEthernetTap.hpp

@@ -35,19 +35,14 @@
 #include <queue>
 #include <stdexcept>
 
-#include "Constants.hpp"
-#include "EthernetTap.hpp"
-#include "Mutex.hpp"
-#include "Thread.hpp"
-#include "Array.hpp"
-
-#include <WinSock2.h>
-#include <Windows.h>
+#include "../Constants.hpp"
+#include "../EthernetTap.hpp"
+#include "../Mutex.hpp"
+#include "../Thread.hpp"
+#include "../Array.hpp"
 
 namespace ZeroTier {
 
-class RuntimeEnvironment;
-
 /**
  * Windows Ethernet tap device using bundled ztTap driver
  */
@@ -114,7 +109,6 @@ public:
 	static int cleanPersistentTapDevices(const RuntimeEnvironment *_r,const std::set<std::string> &exceptThese,bool alsoRemoveUnassociatedDevices);
 
 private:
-	const RuntimeEnvironment *_r;
 	void (*_handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &);
 	void *_arg;
 	Thread _thread;