mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-23 06:42:23 +00:00
127 lines
3.8 KiB
C++
127 lines
3.8 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2011-2014 ZeroTier Networks LLC
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "OSXEthernetTapFactory.hpp"
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#include "OSXEthernetTap.hpp"
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namespace ZeroTier {
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OSXEthernetTapFactory::OSXEthernetTapFactory(const char *pathToTapKext,const char *tapKextName)
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_pathToTapKext((pathToTapKext) ? pathToTapKext : ""),
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_tapKextName((tapKextName) ? tapKextName : "")
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{
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struct stat stattmp;
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if ((_pathToTapKext.length())&&(_tapKextName.length())) {
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if (stat("/dev/zt0",&stattmp)) {
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long kextpid = (long)vfork();
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if (kextpid == 0) {
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::chdir(_pathToTapKext.c_str());
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::execl("/sbin/kextload","/sbin/kextload","-q","-repository",_pathToTapKext.c_str(),_tapKextName.c_str(),(const char *)0);
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::_exit(-1);
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} else if (kextpid > 0) {
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int exitcode = -1;
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::waitpid(kextpid,&exitcode,0);
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} else throw std::runtime_error("unable to create subprocess with fork()");
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}
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}
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if (stat("/dev/zt0",&stattmp)) {
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::usleep(500); // give tap device driver time to start up and try again
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if (stat("/dev/zt0",&stattmp))
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throw std::runtime_error("/dev/zt# tap devices do not exist and unable to load kernel extension");
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}
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}
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OSXEthernetTapFactory::~OSXEthernetTapFactory()
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{
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Mutex::Lock _l(_devices_m);
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for(std::vector<EthernetTap *>::iterator d(_devices.begin());d!=_devices.end();++d)
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delete *d;
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if ((_pathToTapKext.length())&&(_tapKextName.length())) {
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// Attempt to unload kext. If anything else is using a /dev/zt# node, this
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// fails and the kext stays in the kernel.
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char tmp[16384];
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sprintf(tmp,"%s/%s",_pathToTapKext.c_str(),_tapKextName.c_str());
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long kextpid = (long)vfork();
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if (kextpid == 0) {
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::execl("/sbin/kextunload","/sbin/kextunload",tmp,(const char *)0);
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::_exit(-1);
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} else if (kextpid > 0) {
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int exitcode = -1;
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::waitpid(kextpid,&exitcode,0);
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}
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}
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}
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EthernetTap *OSXEthernetTapFactory::open(
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const MAC &mac,
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unsigned int mtu,
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unsigned int metric,
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uint64_t nwid,
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const char *desiredDevice,
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const char *friendlyName,
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void (*handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &),
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void *arg)
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{
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Mutex::Lock _l(_devices_m);
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EthernetTap *t = new OSXEthernetTap(mac,mtu,metric,nwid,desiredDevice,friendlyName,handler,arg);
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_devices.push_back(t);
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return t;
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}
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void OSXEthernetTapFactory::close(EthernetTap *tap)
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{
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{
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Mutex::Lock _l(_devices_m);
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for(std::vector<EthernetTap *>::iterator d(_devices.begin());d!=_devices.end();++d) {
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if (*d == tap) {
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_devices.erase(d);
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break;
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}
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}
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}
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delete tap;
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}
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std::vector<std::string> allTapDeviceNames() const
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{
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std::vector<std::string> dn;
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Mutex::Lock _l(_devices_m);
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for(std::vector<EthernetTap *>::const_iterator d(_devices.begin());d!=_devices.end();++d)
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dn.push_back(d->deviceName());
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return dn;
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}
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} // namespace ZeroTier
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