Move node/osdep/ to sys/

1 files changed, 126 insertions, 0 deletions

diff --git a/sys/OSXEthernetTapFactory.cpp b/sys/OSXEthernetTapFactory.cpp
new file mode 100644
index 00000000..4d0f2069
--- /dev/null
+++ b/sys/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