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-rw-r--r--osnet/BSDRoutingTable.cpp329
-rw-r--r--osnet/BSDRoutingTable.hpp51
-rw-r--r--osnet/LinuxEthernetTap.cpp474
-rw-r--r--osnet/LinuxEthernetTap.hpp85
-rw-r--r--osnet/LinuxEthernetTapFactory.cpp83
-rw-r--r--osnet/LinuxEthernetTapFactory.hpp64
-rw-r--r--osnet/LinuxRoutingTable.cpp247
-rw-r--r--osnet/LinuxRoutingTable.hpp49
-rw-r--r--osnet/OSXEthernetTap.cpp634
-rw-r--r--osnet/OSXEthernetTap.hpp89
-rw-r--r--osnet/OSXEthernetTapFactory.cpp126
-rw-r--r--osnet/OSXEthernetTapFactory.hpp77
-rw-r--r--osnet/WindowsEthernetTap.cpp837
-rw-r--r--osnet/WindowsEthernetTap.hpp130
-rw-r--r--osnet/WindowsEthernetTapFactory.cpp0
-rw-r--r--osnet/WindowsEthernetTapFactory.hpp0
-rw-r--r--osnet/WindowsRoutingTable.cpp0
-rw-r--r--osnet/WindowsRoutingTable.hpp0
18 files changed, 3275 insertions, 0 deletions
diff --git a/osnet/BSDRoutingTable.cpp b/osnet/BSDRoutingTable.cpp
new file mode 100644
index 00000000..fede9cce
--- /dev/null
+++ b/osnet/BSDRoutingTable.cpp
@@ -0,0 +1,329 @@
+/*
+ * 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/route.h>
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <ifaddrs.h>
+
+#include <algorithm>
+#include <utility>
+
+#include "../Constants.hpp"
+#include "BSDRoutingTable.hpp"
+
+// All I wanted was the bloody rounting table. I didn't expect the Spanish inquisition.
+
+#define ZT_BSD_ROUTE_CMD "/sbin/route"
+
+namespace ZeroTier {
+
+BSDRoutingTable::BSDRoutingTable()
+{
+}
+
+BSDRoutingTable::~BSDRoutingTable()
+{
+}
+
+std::vector<RoutingTable::Entry> BSDRoutingTable::get(bool includeLinkLocal,bool includeLoopback) const
+{
+ std::vector<RoutingTable::Entry> entries;
+ int mib[6];
+ size_t needed;
+
+ mib[0] = CTL_NET;
+ mib[1] = PF_ROUTE;
+ mib[2] = 0;
+ mib[3] = 0;
+ mib[4] = NET_RT_DUMP;
+ mib[5] = 0;
+ if (!sysctl(mib,6,NULL,&needed,NULL,0)) {
+ if (needed <= 0)
+ return entries;
+
+ char *buf = (char *)::malloc(needed);
+ if (buf) {
+ if (!sysctl(mib,6,buf,&needed,NULL,0)) {
+ struct rt_msghdr *rtm;
+ for(char *next=buf,*end=buf+needed;next<end;) {
+ rtm = (struct rt_msghdr *)next;
+ char *saptr = (char *)(rtm + 1);
+ char *saend = next + rtm->rtm_msglen;
+
+ if (((rtm->rtm_flags & RTF_LLINFO) == 0)&&((rtm->rtm_flags & RTF_HOST) == 0)&&((rtm->rtm_flags & RTF_UP) != 0)&&((rtm->rtm_flags & RTF_MULTICAST) == 0)) {
+ RoutingTable::Entry e;
+ e.deviceIndex = -9999; // unset
+
+ int which = 0;
+ while (saptr < saend) {
+ struct sockaddr *sa = (struct sockaddr *)saptr;
+ unsigned int salen = sa->sa_len;
+ if (!salen)
+ break;
+
+ // Skip missing fields in rtm_addrs bit field
+ while ((rtm->rtm_addrs & 1) == 0) {
+ rtm->rtm_addrs >>= 1;
+ ++which;
+ if (which > 6)
+ break;
+ }
+ if (which > 6)
+ break;
+
+ rtm->rtm_addrs >>= 1;
+ switch(which++) {
+ case 0:
+ //printf("RTA_DST\n");
+ if (sa->sa_family == AF_INET6) {
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
+ // 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;
+ if (!sin6->sin6_scope_id)
+ sin6->sin6_scope_id = interfaceIndex;
+ }
+ }
+ e.destination.set(sa);
+ break;
+ case 1:
+ //printf("RTA_GATEWAY\n");
+ switch(sa->sa_family) {
+ case AF_LINK:
+ e.deviceIndex = (int)((const struct sockaddr_dl *)sa)->sdl_index;
+ break;
+ case AF_INET:
+ case AF_INET6:
+ e.gateway.set(sa);
+ break;
+ }
+ break;
+ case 2: {
+ if (e.destination.isV6()) {
+ salen = sizeof(struct sockaddr_in6); // Confess!
+ unsigned int bits = 0;
+ for(int i=0;i<16;++i) {
+ unsigned char c = (unsigned char)((const struct sockaddr_in6 *)sa)->sin6_addr.s6_addr[i];
+ if (c == 0xff)
+ bits += 8;
+ else break;
+ /* must they be multiples of 8? Most of the BSD source I can find says yes..?
+ else {
+ while ((c & 0x80) == 0x80) {
+ ++bits;
+ c <<= 1;
+ }
+ break;
+ }
+ */
+ }
+ e.destination.setPort(bits);
+ } else {
+ salen = sizeof(struct sockaddr_in); // Confess!
+ e.destination.setPort((unsigned int)Utils::countBits((uint32_t)((const struct sockaddr_in *)sa)->sin_addr.s_addr));
+ }
+ //printf("RTA_NETMASK\n");
+ } break;
+ /*
+ case 3:
+ //printf("RTA_GENMASK\n");
+ break;
+ case 4:
+ //printf("RTA_IFP\n");
+ break;
+ case 5:
+ //printf("RTA_IFA\n");
+ break;
+ case 6:
+ //printf("RTA_AUTHOR\n");
+ break;
+ */
+ }
+
+ saptr += salen;
+ }
+
+ e.metric = (int)rtm->rtm_rmx.rmx_hopcount;
+ if (e.metric < 0)
+ e.metric = 0;
+
+ if (((includeLinkLocal)||(!e.destination.isLinkLocal()))&&((includeLoopback)||((!e.destination.isLoopback())&&(!e.gateway.isLoopback()))))
+ entries.push_back(e);
+ }
+
+ next = saend;
+ }
+ }
+
+ ::free(buf);
+ }
+ }
+
+ for(std::vector<ZeroTier::RoutingTable::Entry>::iterator e1(entries.begin());e1!=entries.end();++e1) {
+ if ((!e1->device[0])&&(e1->deviceIndex >= 0))
+ if_indextoname(e1->deviceIndex,e1->device);
+ }
+ for(std::vector<ZeroTier::RoutingTable::Entry>::iterator e1(entries.begin());e1!=entries.end();++e1) {
+ if ((!e1->device[0])&&(e1->gateway)) {
+ int bestMetric = 9999999;
+ for(std::vector<ZeroTier::RoutingTable::Entry>::iterator e2(entries.begin());e2!=entries.end();++e2) {
+ if ((e1->gateway.within(e2->destination))&&(e2->metric <= bestMetric)) {
+ bestMetric = e2->metric;
+ Utils::scopy(e1->device,sizeof(e1->device),e2->device);
+ }
+ }
+ }
+ }
+
+ std::sort(entries.begin(),entries.end());
+
+ return entries;
+}
+
+RoutingTable::Entry BSDRoutingTable::set(const InetAddress &destination,const InetAddress &gateway,const char *device,int metric)
+{
+ if ((!gateway)&&((!device)||(!device[0])))
+ return RoutingTable::Entry();
+
+ std::vector<RoutingTable::Entry> rtab(get(true,true));
+
+ for(std::vector<RoutingTable::Entry>::iterator e(rtab.begin());e!=rtab.end();++e) {
+ if (e->destination == destination) {
+ if (((!device)||(!device[0]))||(!strcmp(device,e->device))) {
+ long p = (long)fork();
+ if (p > 0) {
+ int exitcode = -1;
+ ::waitpid(p,&exitcode,0);
+ } else if (p == 0) {
+ ::close(STDOUT_FILENO);
+ ::close(STDERR_FILENO);
+ ::execl(ZT_BSD_ROUTE_CMD,ZT_BSD_ROUTE_CMD,"delete",(destination.isV6() ? "-inet6" : "-inet"),destination.toString().c_str(),(const char *)0);
+ ::_exit(-1);
+ }
+ }
+ }
+ }
+
+ if (metric < 0)
+ return RoutingTable::Entry();
+
+ {
+ char hcstr[64];
+ Utils::snprintf(hcstr,sizeof(hcstr),"%d",metric);
+ long p = (long)fork();
+ if (p > 0) {
+ int exitcode = -1;
+ ::waitpid(p,&exitcode,0);
+ } else if (p == 0) {
+ ::close(STDOUT_FILENO);
+ ::close(STDERR_FILENO);
+ if (gateway) {
+ ::execl(ZT_BSD_ROUTE_CMD,ZT_BSD_ROUTE_CMD,"add",(destination.isV6() ? "-inet6" : "-inet"),destination.toString().c_str(),gateway.toIpString().c_str(),"-hopcount",hcstr,(const char *)0);
+ } else if ((device)&&(device[0])) {
+ ::execl(ZT_BSD_ROUTE_CMD,ZT_BSD_ROUTE_CMD,"add",(destination.isV6() ? "-inet6" : "-inet"),destination.toString().c_str(),"-interface",device,"-hopcount",hcstr,(const char *)0);
+ }
+ ::_exit(-1);
+ }
+ }
+
+ rtab = get(true,true);
+ std::vector<RoutingTable::Entry>::iterator bestEntry(rtab.end());
+ for(std::vector<RoutingTable::Entry>::iterator e(rtab.begin());e!=rtab.end();++e) {
+ if ((e->destination == destination)&&(e->gateway.ipsEqual(gateway))) {
+ if ((device)&&(device[0])) {
+ if (!strcmp(device,e->device)) {
+ if (metric == e->metric)
+ bestEntry = e;
+ }
+ }
+ if (bestEntry == rtab.end())
+ bestEntry = e;
+ }
+ }
+ if (bestEntry != rtab.end())
+ return *bestEntry;
+
+ return RoutingTable::Entry();
+}
+
+} // namespace ZeroTier
+
+// Enable and build to test routing table interface
+#if 0
+using namespace ZeroTier;
+int main(int argc,char **argv)
+{
+ BSDRoutingTable rt;
+
+ printf("<destination> <gateway> <interface> <metric>\n");
+ std::vector<RoutingTable::Entry> ents(rt.get());
+ for(std::vector<RoutingTable::Entry>::iterator e(ents.begin());e!=ents.end();++e)
+ printf("%s\n",e->toString().c_str());
+ printf("\n");
+
+ printf("adding 1.1.1.0 and 2.2.2.0...\n");
+ rt.set(InetAddress("1.1.1.0",24),InetAddress("1.2.3.4",0),(const char *)0,1);
+ rt.set(InetAddress("2.2.2.0",24),InetAddress(),"en0",1);
+ printf("\n");
+
+ printf("<destination> <gateway> <interface> <metric>\n");
+ ents = rt.get();
+ for(std::vector<RoutingTable::Entry>::iterator e(ents.begin());e!=ents.end();++e)
+ printf("%s\n",e->toString().c_str());
+ printf("\n");
+
+ printf("deleting 1.1.1.0 and 2.2.2.0...\n");
+ rt.set(InetAddress("1.1.1.0",24),InetAddress("1.2.3.4",0),(const char *)0,-1);
+ rt.set(InetAddress("2.2.2.0",24),InetAddress(),"en0",-1);
+ printf("\n");
+
+ printf("<destination> <gateway> <interface> <metric>\n");
+ ents = rt.get();
+ for(std::vector<RoutingTable::Entry>::iterator e(ents.begin());e!=ents.end();++e)
+ printf("%s\n",e->toString().c_str());
+ printf("\n");
+
+ return 0;
+}
+#endif
diff --git a/osnet/BSDRoutingTable.hpp b/osnet/BSDRoutingTable.hpp
new file mode 100644
index 00000000..c0e98943
--- /dev/null
+++ b/osnet/BSDRoutingTable.hpp
@@ -0,0 +1,51 @@
+/*
+ * 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_BSDROUTINGTABLE_HPP
+#define ZT_BSDROUTINGTABLE_HPP
+
+#include "../RoutingTable.hpp"
+
+namespace ZeroTier {
+
+/**
+ * Routing table interface for BSD with sysctl() and BSD /sbin/route
+ *
+ * Has currently only been tested on OSX/Darwin.
+ */
+class BSDRoutingTable : public RoutingTable
+{
+public:
+ BSDRoutingTable();
+ virtual ~BSDRoutingTable();
+ virtual std::vector<RoutingTable::Entry> get(bool includeLinkLocal = false,bool includeLoopback = false) const;
+ virtual RoutingTable::Entry set(const InetAddress &destination,const InetAddress &gateway,const char *device,int metric);
+};
+
+} // namespace ZeroTier
+
+#endif
diff --git a/osnet/LinuxEthernetTap.cpp b/osnet/LinuxEthernetTap.cpp
new file mode 100644
index 00000000..0b0c1c4f
--- /dev/null
+++ b/osnet/LinuxEthernetTap.cpp
@@ -0,0 +1,474 @@
+/*
+ * 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/wait.h>
+#include <sys/select.h>
+#include <netinet/in.h>
+#include <net/if_arp.h>
+#include <arpa/inet.h>
+#include <linux/if.h>
+#include <linux/if_tun.h>
+#include <linux/if_addr.h>
+#include <linux/if_ether.h>
+#include <ifaddrs.h>
+
+#include <string>
+#include <map>
+#include <set>
+#include <algorithm>
+
+#include "../Constants.hpp"
+#include "../Utils.hpp"
+#include "../Mutex.hpp"
+#include "LinuxEthernetTap.hpp"
+
+// ff:ff:ff:ff:ff:ff with no ADI
+static const ZeroTier::MulticastGroup _blindWildcardMulticastGroup(ZeroTier::MAC(0xff),0);
+
+// On startup, searches the path for required external utilities (which might vary by Linux distro)
+#define ZT_UNIX_IP_COMMAND 1
+class _CommandFinder
+{
+public:
+ _CommandFinder()
+ {
+ _findCmd(ZT_UNIX_IP_COMMAND,"ip");
+ }
+ inline const char *operator[](int id) const
+ throw()
+ {
+ std::map<int,std::string>::const_iterator c(_paths.find(id));
+ if (c == _paths.end())
+ return (const char *)0;
+ return c->second.c_str();
+ }
+private:
+ inline void _findCmd(int id,const char *name)
+ {
+ char tmp[4096];
+ ZeroTier::Utils::snprintf(tmp,sizeof(tmp),"/sbin/%s",name);
+ if (ZeroTier::Utils::fileExists(tmp)) {
+ _paths[id] = tmp;
+ return;
+ }
+ ZeroTier::Utils::snprintf(tmp,sizeof(tmp),"/usr/sbin/%s",name);
+ if (ZeroTier::Utils::fileExists(tmp)) {
+ _paths[id] = tmp;
+ return;
+ }
+ ZeroTier::Utils::snprintf(tmp,sizeof(tmp),"/bin/%s",name);
+ if (ZeroTier::Utils::fileExists(tmp)) {
+ _paths[id] = tmp;
+ return;
+ }
+ ZeroTier::Utils::snprintf(tmp,sizeof(tmp),"/usr/bin/%s",name);
+ if (ZeroTier::Utils::fileExists(tmp)) {
+ _paths[id] = tmp;
+ return;
+ }
+ }
+ std::map<int,std::string> _paths;
+};
+static const _CommandFinder UNIX_COMMANDS;
+
+namespace ZeroTier {
+
+// Only permit one tap to be opened concurrently across the entire process
+static Mutex __tapCreateLock;
+
+LinuxEthernetTap::LinuxEthernetTap(
+ const RuntimeEnvironment *renv,
+ const char *tryToGetDevice,
+ const MAC &mac,
+ unsigned int mtu,
+ void (*handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &),
+ void *arg)
+ throw(std::runtime_error) :
+ EthernetTap("LinuxEthernetTap",mac,mtu),
+ _r(renv),
+ _handler(handler),
+ _arg(arg),
+ _fd(0),
+ _enabled(true)
+{
+ char procpath[128];
+ struct stat sbuf;
+ Mutex::Lock _l(__tapCreateLock); // create only one tap at a time, globally
+
+ if (mtu > 4096)
+ throw std::runtime_error("max tap MTU is 4096");
+
+ _fd = ::open("/dev/net/tun",O_RDWR);
+ if (_fd <= 0)
+ throw std::runtime_error(std::string("could not open TUN/TAP device: ") + strerror(errno));
+
+ struct ifreq ifr;
+ memset(&ifr,0,sizeof(ifr));
+
+ // Try to recall our last device name, or pick an unused one if that fails.
+ bool recalledDevice = false;
+ if ((tryToGetDevice)&&(tryToGetDevice[0])) {
+ Utils::scopy(ifr.ifr_name,sizeof(ifr.ifr_name),tryToGetDevice);
+ Utils::snprintf(procpath,sizeof(procpath),"/proc/sys/net/ipv4/conf/%s",ifr.ifr_name);
+ recalledDevice = (stat(procpath,&sbuf) != 0);
+ }
+ if (!recalledDevice) {
+ int devno = 0;
+ do {
+ Utils::snprintf(ifr.ifr_name,sizeof(ifr.ifr_name),"zt%d",devno++);
+ Utils::snprintf(procpath,sizeof(procpath),"/proc/sys/net/ipv4/conf/%s",ifr.ifr_name);
+ } while (stat(procpath,&sbuf) == 0); // try zt#++ until we find one that does not exist
+ }
+
+ ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
+ if (ioctl(_fd,TUNSETIFF,(void *)&ifr) < 0) {
+ ::close(_fd);
+ throw std::runtime_error("unable to configure TUN/TAP device for TAP operation");
+ }
+
+ _dev = ifr.ifr_name;
+
+ ioctl(_fd,TUNSETPERSIST,0); // valgrind may generate a false alarm here
+
+ // Open an arbitrary socket to talk to netlink
+ int sock = socket(AF_INET,SOCK_DGRAM,0);
+ if (sock <= 0) {
+ ::close(_fd);
+ throw std::runtime_error("unable to open netlink socket");
+ }
+
+ // Set MAC address
+ ifr.ifr_ifru.ifru_hwaddr.sa_family = ARPHRD_ETHER;
+ mac.copyTo(ifr.ifr_ifru.ifru_hwaddr.sa_data,6);
+ if (ioctl(sock,SIOCSIFHWADDR,(void *)&ifr) < 0) {
+ ::close(_fd);
+ ::close(sock);
+ throw std::runtime_error("unable to configure TAP hardware (MAC) address");
+ return;
+ }
+
+ // Set MTU
+ ifr.ifr_ifru.ifru_mtu = (int)mtu;
+ if (ioctl(sock,SIOCSIFMTU,(void *)&ifr) < 0) {
+ ::close(_fd);
+ ::close(sock);
+ throw std::runtime_error("unable to configure TAP MTU");
+ }
+
+ if (fcntl(_fd,F_SETFL,fcntl(_fd,F_GETFL) & ~O_NONBLOCK) == -1) {
+ ::close(_fd);
+ throw std::runtime_error("unable to set flags on file descriptor for TAP device");
+ }
+
+ /* Bring interface up */
+ if (ioctl(sock,SIOCGIFFLAGS,(void *)&ifr) < 0) {
+ ::close(_fd);
+ ::close(sock);
+ throw std::runtime_error("unable to get TAP interface flags");
+ }
+ ifr.ifr_flags |= IFF_UP;
+ if (ioctl(sock,SIOCSIFFLAGS,(void *)&ifr) < 0) {
+ ::close(_fd);
+ ::close(sock);
+ throw std::runtime_error("unable to set TAP interface flags");
+ }
+
+ ::close(sock);
+
+ // Set close-on-exec so that devices cannot persist if we fork/exec for update
+ fcntl(_fd,F_SETFD,fcntl(_fd,F_GETFD) | FD_CLOEXEC);
+
+ ::pipe(_shutdownSignalPipe);
+
+ _thread = Thread::start(this);
+}
+
+LinuxEthernetTap::~LinuxEthernetTap()
+{
+ ::write(_shutdownSignalPipe[1],"\0",1); // causes thread to exit
+ Thread::join(_thread);
+ ::close(_fd);
+ ::close(_shutdownSignalPipe[0]);
+ ::close(_shutdownSignalPipe[1]);
+}
+
+void LinuxEthernetTap::setEnabled(bool en)
+{
+ _enabled = en;
+ // TODO: interface status change
+}
+
+bool LinuxEthernetTap::enabled() const
+{
+ return _enabled;
+}
+
+static bool ___removeIp(const std::string &_dev,const InetAddress &ip)
+{
+ const char *ipcmd = UNIX_COMMANDS[ZT_UNIX_IP_COMMAND];
+ if (!ipcmd)
+ return false;
+ long cpid = (long)vfork();
+ if (cpid == 0) {
+ execl(ipcmd,ipcmd,"addr","del",ip.toString().c_str(),"dev",_dev.c_str(),(const char *)0);
+ _exit(-1);
+ } else {
+ int exitcode = -1;
+ waitpid(cpid,&exitcode,0);
+ return (exitcode == 0);
+ }
+}
+
+bool LinuxEthernetTap::addIP(const InetAddress &ip)
+{
+ const char *ipcmd = UNIX_COMMANDS[ZT_UNIX_IP_COMMAND];
+ if (!ipcmd) {
+ LOG("ERROR: could not configure IP address for %s: unable to find 'ip' command on system (checked /sbin, /bin, /usr/sbin, /usr/bin)",_dev.c_str());
+ return false;
+ }
+
+ if (!ip)
+ return false;
+
+ std::set<InetAddress> allIps(ips());
+ if (allIps.count(ip) > 0)
+ return true;
+
+ // Remove and reconfigure if address is the same but netmask is different
+ for(std::set<InetAddress>::iterator i(allIps.begin());i!=allIps.end();++i) {
+ if (i->ipsEqual(ip)) {
+ if (___removeIp(_dev,*i)) {
+ break;
+ } else {
+ LOG("WARNING: failed to remove old IP/netmask %s to replace with %s",i->toString().c_str(),ip.toString().c_str());
+ }
+ }
+ }
+
+ long cpid;
+ if ((cpid = (long)vfork()) == 0) {
+ execl(ipcmd,ipcmd,"addr","add",ip.toString().c_str(),"dev",_dev.c_str(),(const char *)0);
+ _exit(-1);
+ } else if (cpid > 0) {
+ int exitcode = -1;
+ waitpid(cpid,&exitcode,0);
+ return (exitcode == 0);
+ }
+
+ return false;
+}
+
+bool LinuxEthernetTap::removeIP(const InetAddress &ip)
+{
+ if (ips().count(ip) > 0) {
+ if (___removeIp(_dev,ip))
+ return true;
+ }
+ return false;
+}
+
+std::set<InetAddress> LinuxEthernetTap::ips() const
+{
+ struct ifaddrs *ifa = (struct ifaddrs *)0;
+ if (getifaddrs(&ifa))
+ return std::set<InetAddress>();
+
+ std::set<InetAddress> r;
+
+ struct ifaddrs *p = ifa;
+ while (p) {
+ if ((!strcmp(p->ifa_name,_dev.c_str()))&&(p->ifa_addr)&&(p->ifa_netmask)&&(p->ifa_addr->sa_family == p->ifa_netmask->sa_family)) {
+ switch(p->ifa_addr->sa_family) {
+ case AF_INET: {
+ struct sockaddr_in *sin = (struct sockaddr_in *)p->ifa_addr;
+ struct sockaddr_in *nm = (struct sockaddr_in *)p->ifa_netmask;
+ r.insert(InetAddress(&(sin->sin_addr.s_addr),4,Utils::countBits((uint32_t)nm->sin_addr.s_addr)));
+ } break;
+ case AF_INET6: {
+ struct sockaddr_in6 *sin = (struct sockaddr_in6 *)p->ifa_addr;
+ struct sockaddr_in6 *nm = (struct sockaddr_in6 *)p->ifa_netmask;
+ uint32_t b[4];
+ memcpy(b,nm->sin6_addr.s6_addr,sizeof(b));
+ r.insert(InetAddress(sin->sin6_addr.s6_addr,16,Utils::countBits(b[0]) + Utils::countBits(b[1]) + Utils::countBits(b[2]) + Utils::countBits(b[3])));
+ } break;
+ }
+ }
+ p = p->ifa_next;
+ }
+
+ if (ifa)
+ freeifaddrs(ifa);
+
+ return r;
+}
+
+void LinuxEthernetTap::put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len)
+{
+ 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;
+ ::write(_fd,putBuf,len);
+ }
+}
+
+std::string LinuxEthernetTap::deviceName() const
+{
+ return _dev;
+}
+
+std::string LinuxEthernetTap::persistentId() const
+{
+ return std::string();
+}
+
+bool LinuxEthernetTap::updateMulticastGroups(std::set<MulticastGroup> &groups)
+{
+ char *ptr,*ptr2;
+ unsigned char mac[6];
+ std::set<MulticastGroup> newGroups;
+
+ int fd = ::open("/proc/net/dev_mcast",O_RDONLY);
+ if (fd > 0) {
+ char buf[131072];
+ int n = (int)::read(fd,buf,sizeof(buf));
+ if ((n > 0)&&(n < (int)sizeof(buf))) {
+ buf[n] = (char)0;
+ for(char *l=strtok_r(buf,"\r\n",&ptr);(l);l=strtok_r((char *)0,"\r\n",&ptr)) {
+ int fno = 0;
+ char *devname = (char *)0;
+ char *mcastmac = (char *)0;
+ for(char *f=strtok_r(l," \t",&ptr2);(f);f=strtok_r((char *)0," \t",&ptr2)) {
+ if (fno == 1)
+ devname = f;
+ else if (fno == 4)
+ mcastmac = f;
+ ++fno;
+ }
+ if ((devname)&&(!strcmp(devname,_dev.c_str()))&&(mcastmac)&&(Utils::unhex(mcastmac,mac,6) == 6))
+ newGroups.insert(MulticastGroup(MAC(mac,6),0));
+ }
+ }
+ ::close(fd);
+ }
+
+ {
+ std::set<InetAddress> allIps(ips());
+ for(std::set<InetAddress>::const_iterator i(allIps.begin());i!=allIps.end();++i)
+ newGroups.insert(MulticastGroup::deriveMulticastGroupForAddressResolution(*i));
+ }
+
+ bool changed = false;
+
+ for(std::set<MulticastGroup>::iterator mg(newGroups.begin());mg!=newGroups.end();++mg) {
+ if (!groups.count(*mg)) {
+ groups.insert(*mg);
+ changed = true;
+ }
+ }
+ for(std::set<MulticastGroup>::iterator mg(groups.begin());mg!=groups.end();) {
+ if ((!newGroups.count(*mg))&&(*mg != _blindWildcardMulticastGroup)) {
+ groups.erase(mg++);
+ changed = true;
+ } else ++mg;
+ }
+
+ return changed;
+}
+
+void LinuxEthernetTap::threadMain()
+ throw()
+{
+ fd_set readfds,nullfds;
+ MAC to,from;
+ int n,nfds,r;
+ char getBuf[8194];
+ Buffer<4096> data;
+
+ // Wait for a moment after startup -- wait for Network to finish
+ // constructing itself.
+ Thread::sleep(500);
+
+ FD_ZERO(&readfds);
+ FD_ZERO(&nullfds);
+ nfds = (int)std::max(_shutdownSignalPipe[0],_fd) + 1;
+
+ r = 0;
+ for(;;) {
+ FD_SET(_shutdownSignalPipe[0],&readfds);
+ FD_SET(_fd,&readfds);
+ select(nfds,&readfds,&nullfds,&nullfds,(struct timeval *)0);
+
+ if (FD_ISSET(_shutdownSignalPipe[0],&readfds)) // writes to shutdown pipe terminate thread
+ break;
+
+ 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));
+ break;
+ }
+ } else {
+ // Some tap drivers like to send the ethernet frame and the
+ // payload in two chunks, so handle that by accumulating
+ // data until we have at least a frame.
+ r += n;
+ if (r > 14) {
+ if (r > ((int)_mtu + 14)) // sanity check for weird TAP behavior on some platforms
+ r = _mtu + 14;
+
+ 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;
+ }
+ }
+ }
+ }
+}
+
+} // namespace ZeroTier
diff --git a/osnet/LinuxEthernetTap.hpp b/osnet/LinuxEthernetTap.hpp
new file mode 100644
index 00000000..e6aea2ec
--- /dev/null
+++ b/osnet/LinuxEthernetTap.hpp
@@ -0,0 +1,85 @@
+/*
+ * 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_LINUXETHERNETTAP_HPP
+#define ZT_LINUXETHERNETTAP_HPP
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <stdexcept>
+
+#include "../EthernetTap.hpp"
+#include "../Mutex.hpp"
+#include "../Thread.hpp"
+
+namespace ZeroTier {
+
+/**
+ * Linux Ethernet tap using kernel tun/tap driver
+ */
+class LinuxEthernetTap : public EthernetTap
+{
+public:
+ LinuxEthernetTap(
+ 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 ~LinuxEthernetTap();
+
+ virtual void setEnabled(bool en);
+ virtual bool enabled() const;
+ virtual bool addIP(const InetAddress &ip);
+ virtual bool removeIP(const InetAddress &ip);
+ virtual std::set<InetAddress> ips() const;
+ virtual void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
+ virtual std::string deviceName() const;
+ virtual std::string persistentId() const;
+ virtual bool updateMulticastGroups(std::set<MulticastGroup> &groups);
+
+ void threadMain()
+ throw();
+
+private:
+ void (*_handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &);
+ void *_arg;
+ Thread _thread;
+ std::string _dev;
+ int _fd;
+ int _shutdownSignalPipe[2];
+ volatile bool _enabled;
+};
+
+} // namespace ZeroTier
+
+#endif
diff --git a/osnet/LinuxEthernetTapFactory.cpp b/osnet/LinuxEthernetTapFactory.cpp
new file mode 100644
index 00000000..fccb6bd5
--- /dev/null
+++ b/osnet/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
diff --git a/osnet/LinuxEthernetTapFactory.hpp b/osnet/LinuxEthernetTapFactory.hpp
new file mode 100644
index 00000000..a5d13216
--- /dev/null
+++ b/osnet/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
diff --git a/osnet/LinuxRoutingTable.cpp b/osnet/LinuxRoutingTable.cpp
new file mode 100644
index 00000000..67a5b22d
--- /dev/null
+++ b/osnet/LinuxRoutingTable.cpp
@@ -0,0 +1,247 @@
+/*
+ * 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <ifaddrs.h>
+
+#include <algorithm>
+#include <utility>
+
+#include "../Constants.hpp"
+#include "../Utils.hpp"
+#include "LinuxRoutingTable.hpp"
+
+#define ZT_LINUX_IP_COMMAND "/sbin/ip"
+
+namespace ZeroTier {
+
+LinuxRoutingTable::LinuxRoutingTable()
+{
+}
+
+LinuxRoutingTable::~LinuxRoutingTable()
+{
+}
+
+std::vector<RoutingTable::Entry> LinuxRoutingTable::get(bool includeLinkLocal,bool includeLoopback) const
+{
+ char buf[131072];
+ char *stmp,*stmp2;
+ std::vector<RoutingTable::Entry> entries;
+
+ {
+ int fd = ::open("/proc/net/route",O_RDONLY);
+ if (fd <= 0)
+ buf[0] = (char)0;
+ else {
+ int n = (int)::read(fd,buf,sizeof(buf) - 1);
+ ::close(fd);
+ if (n < 0) n = 0;
+ buf[n] = (char)0;
+ }
+ }
+
+ int lineno = 0;
+ for(char *line=Utils::stok(buf,"\r\n",&stmp);(line);line=Utils::stok((char *)0,"\r\n",&stmp)) {
+ if (lineno == 0) {
+ ++lineno;
+ continue; // skip header
+ }
+
+ char *iface = (char *)0;
+ uint32_t destination = 0;
+ uint32_t gateway = 0;
+ int metric = 0;
+ uint32_t mask = 0;
+
+ int fno = 0;
+ for(char *f=Utils::stok(line,"\t \r\n",&stmp2);(f);f=Utils::stok((char *)0,"\t \r\n",&stmp2)) {
+ switch(fno) {
+ case 0: iface = f; break;
+ case 1: destination = (uint32_t)Utils::hexStrToULong(f); break;
+ case 2: gateway = (uint32_t)Utils::hexStrToULong(f); break;
+ case 6: metric = (int)Utils::strToInt(f); break;
+ case 7: mask = (uint32_t)Utils::hexStrToULong(f); break;
+ }
+ ++fno;
+ }
+
+ if ((iface)&&(destination)) {
+ RoutingTable::Entry e;
+ if (destination)
+ e.destination.set(&destination,4,Utils::countBits(mask));
+ e.gateway.set(&gateway,4,0);
+ e.deviceIndex = 0; // not used on Linux
+ e.metric = metric;
+ Utils::scopy(e.device,sizeof(e.device),iface);
+ if ((e.destination)&&((includeLinkLocal)||(!e.destination.isLinkLocal()))&&((includeLoopback)||((!e.destination.isLoopback())&&(!e.gateway.isLoopback())&&(strcmp(iface,"lo")))))
+ entries.push_back(e);
+ }
+
+ ++lineno;
+ }
+
+ {
+ int fd = ::open("/proc/net/ipv6_route",O_RDONLY);
+ if (fd <= 0)
+ buf[0] = (char)0;
+ else {
+ int n = (int)::read(fd,buf,sizeof(buf) - 1);
+ ::close(fd);
+ if (n < 0) n = 0;
+ buf[n] = (char)0;
+ }
+ }
+
+ for(char *line=Utils::stok(buf,"\r\n",&stmp);(line);line=Utils::stok((char *)0,"\r\n",&stmp)) {
+ char *destination = (char *)0;
+ unsigned int destPrefixLen = 0;
+ char *gateway = (char *)0; // next hop in ipv6 terminology
+ int metric = 0;
+ char *device = (char *)0;
+
+ int fno = 0;
+ for(char *f=Utils::stok(line,"\t \r\n",&stmp2);(f);f=Utils::stok((char *)0,"\t \r\n",&stmp2)) {
+ switch(fno) {
+ case 0: destination = f; break;
+ case 1: destPrefixLen = (unsigned int)Utils::hexStrToULong(f); break;
+ case 4: gateway = f; break;
+ case 5: metric = (int)Utils::hexStrToLong(f); break;
+ case 9: device = f; break;
+ }
+ ++fno;
+ }
+
+ if ((device)&&(destination)) {
+ unsigned char tmp[16];
+ RoutingTable::Entry e;
+ Utils::unhex(destination,tmp,16);
+ if ((!Utils::isZero(tmp,16))&&(tmp[0] != 0xff))
+ e.destination.set(tmp,16,destPrefixLen);
+ Utils::unhex(gateway,tmp,16);
+ e.gateway.set(tmp,16,0);
+ e.deviceIndex = 0; // not used on Linux
+ e.metric = metric;
+ Utils::scopy(e.device,sizeof(e.device),device);
+ if ((e.destination)&&((includeLinkLocal)||(!e.destination.isLinkLocal()))&&((includeLoopback)||((!e.destination.isLoopback())&&(!e.gateway.isLoopback())&&(strcmp(device,"lo")))))
+ entries.push_back(e);
+ }
+ }
+
+ std::sort(entries.begin(),entries.end());
+ return entries;
+}
+
+RoutingTable::Entry LinuxRoutingTable::set(const InetAddress &destination,const InetAddress &gateway,const char *device,int metric)
+{
+ if ((!gateway)&&((!device)||(!device[0])))
+ return RoutingTable::Entry();
+
+ std::vector<RoutingTable::Entry> rtab(get(true,true));
+
+ for(std::vector<RoutingTable::Entry>::iterator e(rtab.begin());e!=rtab.end();++e) {
+ if (e->destination == destination) {
+ if (((!device)||(!device[0]))||(!strcmp(device,e->device))) {
+ }
+ }
+ }
+
+ if (metric < 0)
+ return RoutingTable::Entry();
+
+
+
+ rtab = get(true,true);
+ std::vector<RoutingTable::Entry>::iterator bestEntry(rtab.end());
+ for(std::vector<RoutingTable::Entry>::iterator e(rtab.begin());e!=rtab.end();++e) {
+ if ((e->destination == destination)&&(e->gateway.ipsEqual(gateway))) {
+ if ((device)&&(device[0])) {
+ if (!strcmp(device,e->device)) {
+ if (metric == e->metric)
+ bestEntry = e;
+ }
+ }
+ if (bestEntry == rtab.end())
+ bestEntry = e;
+ }
+ }
+ if (bestEntry != rtab.end())
+ return *bestEntry;
+
+ return RoutingTable::Entry();
+}
+
+} // namespace ZeroTier
+
+// Enable and build to test routing table interface
+//#if 0
+using namespace ZeroTier;
+int main(int argc,char **argv)
+{
+ LinuxRoutingTable rt;
+
+ printf("<destination> <gateway> <interface> <metric>\n");
+ std::vector<RoutingTable::Entry> ents(rt.get());
+ for(std::vector<RoutingTable::Entry>::iterator e(ents.begin());e!=ents.end();++e)
+ printf("%s\n",e->toString().c_str());
+ printf("\n");
+
+ printf("adding 1.1.1.0 and 2.2.2.0...\n");
+ rt.set(InetAddress("1.1.1.0",24),InetAddress("1.2.3.4",0),(const char *)0,1);
+ rt.set(InetAddress("2.2.2.0",24),InetAddress(),"en0",1);
+ printf("\n");
+
+ printf("<destination> <gateway> <interface> <metric>\n");
+ ents = rt.get();
+ for(std::vector<RoutingTable::Entry>::iterator e(ents.begin());e!=ents.end();++e)
+ printf("%s\n",e->toString().c_str());
+ printf("\n");
+
+ printf("deleting 1.1.1.0 and 2.2.2.0...\n");
+ rt.set(InetAddress("1.1.1.0",24),InetAddress("1.2.3.4",0),(const char *)0,-1);
+ rt.set(InetAddress("2.2.2.0",24),InetAddress(),"en0",-1);
+ printf("\n");
+
+ printf("<destination> <gateway> <interface> <metric>\n");
+ ents = rt.get();
+ for(std::vector<RoutingTable::Entry>::iterator e(ents.begin());e!=ents.end();++e)
+ printf("%s\n",e->toString().c_str());
+ printf("\n");
+
+ return 0;
+}
+//#endif
diff --git a/osnet/LinuxRoutingTable.hpp b/osnet/LinuxRoutingTable.hpp
new file mode 100644
index 00000000..9a5d3fd6
--- /dev/null
+++ b/osnet/LinuxRoutingTable.hpp
@@ -0,0 +1,49 @@
+/*
+ * 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_LINUXROUTINGTABLE_HPP
+#define ZT_LINUXROUTINGTABLE_HPP
+
+#include "../RoutingTable.hpp"
+
+namespace ZeroTier {
+
+/**
+ * Routing table interface via /proc/net/route, /proc/net/ipv6_route, and /sbin/route command
+ */
+class LinuxRoutingTable : public RoutingTable
+{
+public:
+ LinuxRoutingTable();
+ virtual ~LinuxRoutingTable();
+ virtual std::vector<RoutingTable::Entry> get(bool includeLinkLocal = false,bool includeLoopback = false) const;
+ virtual RoutingTable::Entry set(const InetAddress &destination,const InetAddress &gateway,const char *device,int metric);
+};
+
+} // namespace ZeroTier
+
+#endif
diff --git a/osnet/OSXEthernetTap.cpp b/osnet/OSXEthernetTap.cpp
new file mode 100644
index 00000000..1e2ddbed
--- /dev/null
+++ b/osnet/OSXEthernetTap.cpp
@@ -0,0 +1,634 @@
+/*
+ * 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include <unistd.h>
+#include <signal.h>
+
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/wait.h>
+#include <sys/select.h>
+#include <sys/cdefs.h>
+#include <sys/uio.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/route.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+#include <net/if_dl.h>
+#include <net/if_media.h>
+#include <netinet6/in6_var.h>
+#include <netinet/in_var.h>
+#include <netinet/icmp6.h>
+#include <netinet6/nd6.h>
+#include <ifaddrs.h>
+
+// OSX compile fix... in6_var defines this in a struct which namespaces it for C++
+struct prf_ra {
+ u_char onlink : 1;
+ u_char autonomous : 1;
+ u_char reserved : 6;
+} prf_ra;
+
+// These are KERNEL_PRIVATE... why?
+#ifndef SIOCAUTOCONF_START
+#define SIOCAUTOCONF_START _IOWR('i', 132, struct in6_ifreq) /* accept rtadvd on this interface */
+#endif
+#ifndef SIOCAUTOCONF_STOP
+#define SIOCAUTOCONF_STOP _IOWR('i', 133, struct in6_ifreq) /* stop accepting rtadv for this interface */
+#endif
+
+// --------------------------------------------------------------------------
+// --------------------------------------------------------------------------
+// This source is from:
+// http://www.opensource.apple.com/source/Libinfo/Libinfo-406.17/gen.subproj/getifmaddrs.c?txt
+// It's here because OSX 10.6 does not have this convenience function.
+
+#define SALIGN (sizeof(uint32_t) - 1)
+#define SA_RLEN(sa) ((sa)->sa_len ? (((sa)->sa_len + SALIGN) & ~SALIGN) : \
+(SALIGN + 1))
+#define MAX_SYSCTL_TRY 5
+#define RTA_MASKS (RTA_GATEWAY | RTA_IFP | RTA_IFA)
+
+/* FreeBSD uses NET_RT_IFMALIST and RTM_NEWMADDR from <sys/socket.h> */
+/* We can use NET_RT_IFLIST2 and RTM_NEWMADDR2 on Darwin */
+//#define DARWIN_COMPAT
+
+//#ifdef DARWIN_COMPAT
+#define GIM_SYSCTL_MIB NET_RT_IFLIST2
+#define GIM_RTM_ADDR RTM_NEWMADDR2
+//#else
+//#define GIM_SYSCTL_MIB NET_RT_IFMALIST
+//#define GIM_RTM_ADDR RTM_NEWMADDR
+//#endif
+
+// Not in 10.6 includes so use our own
+struct _intl_ifmaddrs {
+ struct _intl_ifmaddrs *ifma_next;
+ struct sockaddr *ifma_name;
+ struct sockaddr *ifma_addr;
+ struct sockaddr *ifma_lladdr;
+};
+
+static inline int _intl_getifmaddrs(struct _intl_ifmaddrs **pif)
+{
+ int icnt = 1;
+ int dcnt = 0;
+ int ntry = 0;
+ size_t len;
+ size_t needed;
+ int mib[6];
+ int i;
+ char *buf;
+ char *data;
+ char *next;
+ char *p;
+ struct ifma_msghdr2 *ifmam;
+ struct _intl_ifmaddrs *ifa, *ift;
+ struct rt_msghdr *rtm;
+ struct sockaddr *sa;
+
+ mib[0] = CTL_NET;
+ mib[1] = PF_ROUTE;
+ mib[2] = 0; /* protocol */
+ mib[3] = 0; /* wildcard address family */
+ mib[4] = GIM_SYSCTL_MIB;
+ mib[5] = 0; /* no flags */
+ do {
+ if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
+ return (-1);
+ if ((buf = (char *)malloc(needed)) == NULL)
+ return (-1);
+ if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
+ if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) {
+ free(buf);
+ return (-1);
+ }
+ free(buf);
+ buf = NULL;
+ }
+ } while (buf == NULL);
+
+ for (next = buf; next < buf + needed; next += rtm->rtm_msglen) {
+ rtm = (struct rt_msghdr *)(void *)next;
+ if (rtm->rtm_version != RTM_VERSION)
+ continue;
+ switch (rtm->rtm_type) {
+ case GIM_RTM_ADDR:
+ ifmam = (struct ifma_msghdr2 *)(void *)rtm;
+ if ((ifmam->ifmam_addrs & RTA_IFA) == 0)
+ break;
+ icnt++;
+ p = (char *)(ifmam + 1);
+ for (i = 0; i < RTAX_MAX; i++) {
+ if ((RTA_MASKS & ifmam->ifmam_addrs &
+ (1 << i)) == 0)
+ continue;
+ sa = (struct sockaddr *)(void *)p;
+ len = SA_RLEN(sa);
+ dcnt += len;
+ p += len;
+ }
+ break;
+ }
+ }
+
+ data = (char *)malloc(sizeof(struct _intl_ifmaddrs) * icnt + dcnt);
+ if (data == NULL) {
+ free(buf);
+ return (-1);
+ }
+
+ ifa = (struct _intl_ifmaddrs *)(void *)data;
+ data += sizeof(struct _intl_ifmaddrs) * icnt;
+
+ memset(ifa, 0, sizeof(struct _intl_ifmaddrs) * icnt);
+ ift = ifa;
+
+ for (next = buf; next < buf + needed; next += rtm->rtm_msglen) {
+ rtm = (struct rt_msghdr *)(void *)next;
+ if (rtm->rtm_version != RTM_VERSION)
+ continue;
+
+ switch (rtm->rtm_type) {
+ case GIM_RTM_ADDR:
+ ifmam = (struct ifma_msghdr2 *)(void *)rtm;
+ if ((ifmam->ifmam_addrs & RTA_IFA) == 0)
+ break;
+
+ p = (char *)(ifmam + 1);
+ for (i = 0; i < RTAX_MAX; i++) {
+ if ((RTA_MASKS & ifmam->ifmam_addrs &
+ (1 << i)) == 0)
+ continue;
+ sa = (struct sockaddr *)(void *)p;
+ len = SA_RLEN(sa);
+ switch (i) {
+ case RTAX_GATEWAY:
+ ift->ifma_lladdr =
+ (struct sockaddr *)(void *)data;
+ memcpy(data, p, len);
+ data += len;
+ break;
+
+ case RTAX_IFP:
+ ift->ifma_name =
+ (struct sockaddr *)(void *)data;
+ memcpy(data, p, len);
+ data += len;
+ break;
+
+ case RTAX_IFA:
+ ift->ifma_addr =
+ (struct sockaddr *)(void *)data;
+ memcpy(data, p, len);
+ data += len;
+ break;
+
+ default:
+ data += len;
+ break;
+ }
+ p += len;
+ }
+ ift->ifma_next = ift + 1;
+ ift = ift->ifma_next;
+ break;
+ }
+ }
+
+ free(buf);
+
+ if (ift > ifa) {
+ ift--;
+ ift->ifma_next = NULL;
+ *pif = ifa;
+ } else {
+ *pif = NULL;
+ free(ifa);
+ }
+ return (0);
+}
+
+static inline void _intl_freeifmaddrs(struct _intl_ifmaddrs *ifmp)
+{
+ free(ifmp);
+}
+
+// --------------------------------------------------------------------------
+// --------------------------------------------------------------------------
+
+#include <string>
+#include <map>
+#include <set>
+#include <algorithm>
+
+#include "../Constants.hpp"
+#include "../Utils.hpp"
+#include "../Mutex.hpp"
+#include "OSXEthernetTap.hpp"
+
+// ff:ff:ff:ff:ff:ff with no ADI
+static const ZeroTier::MulticastGroup _blindWildcardMulticastGroup(ZeroTier::MAC(0xff),0);
+
+static inline bool _setIpv6Stuff(const char *ifname,bool performNUD,bool acceptRouterAdverts)
+{
+ struct in6_ndireq nd;
+ struct in6_ifreq ifr;
+
+ int s = socket(AF_INET6,SOCK_DGRAM,0);
+ if (s <= 0)
+ return false;
+
+ memset(&nd,0,sizeof(nd));
+ strncpy(nd.ifname,ifname,sizeof(nd.ifname));
+
+ if (ioctl(s,SIOCGIFINFO_IN6,&nd)) {
+ close(s);
+ return false;
+ }
+
+ unsigned long oldFlags = (unsigned long)nd.ndi.flags;
+
+ if (performNUD)
+ nd.ndi.flags |= ND6_IFF_PERFORMNUD;
+ else nd.ndi.flags &= ~ND6_IFF_PERFORMNUD;
+
+ if (oldFlags != (unsigned long)nd.ndi.flags) {
+ if (ioctl(s,SIOCSIFINFO_FLAGS,&nd)) {
+ close(s);
+ return false;
+ }
+ }
+
+ memset(&ifr,0,sizeof(ifr));
+ strncpy(ifr.ifr_name,ifname,sizeof(ifr.ifr_name));
+ if (ioctl(s,acceptRouterAdverts ? SIOCAUTOCONF_START : SIOCAUTOCONF_STOP,&ifr)) {
+ close(s);
+ return false;
+ }
+
+ close(s);
+ return true;
+}
+
+namespace ZeroTier {
+
+// Only permit one tap to be opened concurrently across the entire process
+static Mutex __tapCreateLock;
+
+OSXEthernetTap::OSXEthernetTap(
+ const RuntimeEnvironment *renv,
+ const char *tryToGetDevice,
+ const MAC &mac,
+ unsigned int mtu,
+ void (*handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &),
+ void *arg)
+ throw(std::runtime_error) :
+ EthernetTap("OSXEthernetTap",mac,mtu,metric),
+ _r(renv),
+ _handler(handler),
+ _arg(arg),
+ _fd(0),
+ _enabled(true)
+{
+ 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");
+ if (stat("/dev/zt0",&stattmp))
+ throw std::runtime_error("/dev/zt# tap devices do not exist and unable to load kernel extension");
+
+ // Try to reopen the last device we had, if we had one and it's still unused.
+ bool recalledDevice = false;
+ if ((tryToGetDevice)&&(tryToGetDevice[0])) {
+ Utils::snprintf(devpath,sizeof(devpath),"/dev/%s",tryToGetDevice);
+ if (stat(devpath,&stattmp) == 0) {
+ _fd = ::open(devpath,O_RDWR);
+ if (_fd > 0) {
+ _dev = tryToGetDevice;
+ recalledDevice = true;
+ }
+ }
+ }
+
+ // Open the first unused tap device if we didn't recall a previous one.
+ if (!recalledDevice) {
+ for(int i=0;i<256;++i) {
+ Utils::snprintf(devpath,sizeof(devpath),"/dev/zt%d",i);
+ if (stat(devpath,&stattmp))
+ throw std::runtime_error("no more TAP devices available");
+ _fd = ::open(devpath,O_RDWR);
+ if (_fd > 0) {
+ char foo[16];
+ Utils::snprintf(foo,sizeof(foo),"zt%d",i);
+ _dev = foo;
+ break;
+ }
+ }
+ }
+
+ if (_fd <= 0)
+ throw std::runtime_error("unable to open TAP device or no more devices available");
+
+ if (fcntl(_fd,F_SETFL,fcntl(_fd,F_GETFL) & ~O_NONBLOCK) == -1) {
+ ::close(_fd);
+ throw std::runtime_error("unable to set flags on file descriptor for TAP device");
+ }
+
+ // 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);
+ 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);
+ if (exitcode) {
+ ::close(_fd);
+ throw std::runtime_error("ifconfig failure setting link-layer address and activating tap interface");
+ }
+ }
+
+ _setIpv6Stuff(_dev.c_str(),true,false);
+
+ // Set close-on-exec so that devices cannot persist if we fork/exec for update
+ fcntl(_fd,F_SETFD,fcntl(_fd,F_GETFD) | FD_CLOEXEC);
+
+ ::pipe(_shutdownSignalPipe);
+
+ _thread = Thread::start(this);
+}
+
+OSXEthernetTap::~OSXEthernetTap()
+{
+ ::write(_shutdownSignalPipe[1],"\0",1); // causes thread to exit
+ Thread::join(_thread);
+ ::close(_fd);
+ ::close(_shutdownSignalPipe[0]);
+ ::close(_shutdownSignalPipe[1]);
+}
+
+void OSXEthernetTap::setEnabled(bool en)
+{
+ _enabled = en;
+ // TODO: interface status change
+}
+
+bool OSXEthernetTap::enabled() const
+{
+ return _enabled;
+}
+
+static bool ___removeIp(const std::string &_dev,const InetAddress &ip)
+{
+ 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 (cpid > 0) {
+ int exitcode = -1;
+ waitpid(cpid,&exitcode,0);
+ return (exitcode == 0);
+ }
+ return false; // never reached, make compiler shut up about return value
+}
+
+bool OSXEthernetTap::addIP(const InetAddress &ip)
+{
+ if (!ip)
+ return false;
+
+ std::set<InetAddress> allIps(ips());
+ if (allIps.count(ip) > 0)
+ return true; // IP/netmask already assigned
+
+ // Remove and reconfigure if address is the same but netmask is different
+ for(std::set<InetAddress>::iterator i(allIps.begin());i!=allIps.end();++i) {
+ if ((i->ipsEqual(ip))&&(i->netmaskBits() != ip.netmaskBits())) {
+ if (___removeIp(_dev,*i)) {
+ break;
+ } else {
+ LOG("WARNING: failed to remove old IP/netmask %s to replace with %s",i->toString().c_str(),ip.toString().c_str());
+ }
+ }
+ }
+
+ 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);
+ return (exitcode == 0);
+ }
+ return false;
+}
+
+bool OSXEthernetTap::removeIP(const InetAddress &ip)
+{
+ if (ips().count(ip) > 0) {
+ if (___removeIp(_dev,ip))
+ return true;
+ }
+ return false;
+}
+
+std::set<InetAddress> OSXEthernetTap::ips() const
+{
+ struct ifaddrs *ifa = (struct ifaddrs *)0;
+ if (getifaddrs(&ifa))
+ return std::set<InetAddress>();
+
+ std::set<InetAddress> r;
+
+ struct ifaddrs *p = ifa;
+ while (p) {
+ if ((!strcmp(p->ifa_name,_dev.c_str()))&&(p->ifa_addr)&&(p->ifa_netmask)&&(p->ifa_addr->sa_family == p->ifa_netmask->sa_family)) {
+ switch(p->ifa_addr->sa_family) {
+ case AF_INET: {
+ struct sockaddr_in *sin = (struct sockaddr_in *)p->ifa_addr;
+ struct sockaddr_in *nm = (struct sockaddr_in *)p->ifa_netmask;
+ r.insert(InetAddress(&(sin->sin_addr.s_addr),4,Utils::countBits((uint32_t)nm->sin_addr.s_addr)));
+ } break;
+ case AF_INET6: {
+ struct sockaddr_in6 *sin = (struct sockaddr_in6 *)p->ifa_addr;
+ struct sockaddr_in6 *nm = (struct sockaddr_in6 *)p->ifa_netmask;
+ uint32_t b[4];
+ memcpy(b,nm->sin6_addr.s6_addr,sizeof(b));
+ r.insert(InetAddress(sin->sin6_addr.s6_addr,16,Utils::countBits(b[0]) + Utils::countBits(b[1]) + Utils::countBits(b[2]) + Utils::countBits(b[3])));
+ } break;
+ }
+ }
+ p = p->ifa_next;
+ }
+
+ if (ifa)
+ freeifaddrs(ifa);
+
+ return r;
+}
+
+void OSXEthernetTap::put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len)
+{
+ 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;
+ ::write(_fd,putBuf,len);
+ }
+}
+
+std::string OSXEthernetTap::deviceName() const
+{
+ return _dev;
+}
+
+std::string OSXEthernetTap::persistentId() const
+{
+ return std::string();
+}
+
+bool OSXEthernetTap::updateMulticastGroups(std::set<MulticastGroup> &groups)
+{
+ std::set<MulticastGroup> newGroups;
+ struct _intl_ifmaddrs *ifmap = (struct _intl_ifmaddrs *)0;
+ if (!_intl_getifmaddrs(&ifmap)) {
+ struct _intl_ifmaddrs *p = ifmap;
+ while (p) {
+ if (p->ifma_addr->sa_family == AF_LINK) {
+ struct sockaddr_dl *in = (struct sockaddr_dl *)p->ifma_name;
+ struct sockaddr_dl *la = (struct sockaddr_dl *)p->ifma_addr;
+ if ((la->sdl_alen == 6)&&(in->sdl_nlen <= _dev.length())&&(!memcmp(_dev.data(),in->sdl_data,in->sdl_nlen)))
+ newGroups.insert(MulticastGroup(MAC(la->sdl_data + la->sdl_nlen,6),0));
+ }
+ p = p->ifma_next;
+ }
+ _intl_freeifmaddrs(ifmap);
+ }
+
+ {
+ std::set<InetAddress> allIps(ips());
+ for(std::set<InetAddress>::const_iterator i(allIps.begin());i!=allIps.end();++i)
+ newGroups.insert(MulticastGroup::deriveMulticastGroupForAddressResolution(*i));
+ }
+
+ bool changed = false;
+
+ for(std::set<MulticastGroup>::iterator mg(newGroups.begin());mg!=newGroups.end();++mg) {
+ if (!groups.count(*mg)) {
+ groups.insert(*mg);
+ changed = true;
+ }
+ }
+ for(std::set<MulticastGroup>::iterator mg(groups.begin());mg!=groups.end();) {
+ if ((!newGroups.count(*mg))&&(*mg != _blindWildcardMulticastGroup)) {
+ groups.erase(mg++);
+ changed = true;
+ } else ++mg;
+ }
+
+ return changed;
+}
+
+void OSXEthernetTap::threadMain()
+ throw()
+{
+ fd_set readfds,nullfds;
+ MAC to,from;
+ int n,nfds,r;
+ char getBuf[8194];
+ Buffer<4096> data;
+
+ // Wait for a moment after startup -- wait for Network to finish
+ // constructing itself.
+ Thread::sleep(500);
+
+ FD_ZERO(&readfds);
+ FD_ZERO(&nullfds);
+ nfds = (int)std::max(_shutdownSignalPipe[0],_fd) + 1;
+
+ r = 0;
+ for(;;) {
+ FD_SET(_shutdownSignalPipe[0],&readfds);
+ FD_SET(_fd,&readfds);
+ select(nfds,&readfds,&nullfds,&nullfds,(struct timeval *)0);
+
+ if (FD_ISSET(_shutdownSignalPipe[0],&readfds)) // writes to shutdown pipe terminate thread
+ break;
+
+ if (FD_ISSET(_fd,&readfds)) {
+ n = (int)::read(_fd,getBuf + r,sizeof(getBuf) - r);
+ if (n < 0) {
+ 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
+ // data until we have at least a frame.
+ r += n;
+ if (r > 14) {
+ if (r > ((int)_mtu + 14)) // sanity check for weird TAP behavior on some platforms
+ r = _mtu + 14;
+
+ 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;
+ }
+ }
+ }
+ }
+}
+
+} // namespace ZeroTier
diff --git a/osnet/OSXEthernetTap.hpp b/osnet/OSXEthernetTap.hpp
new file mode 100644
index 00000000..7ca63730
--- /dev/null
+++ b/osnet/OSXEthernetTap.hpp
@@ -0,0 +1,89 @@
+/*
+ * 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_OSXETHERNETTAP_HPP
+#define ZT_OSXETHERNETTAP_HPP
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <stdexcept>
+
+#include "../EthernetTap.hpp"
+#include "../Mutex.hpp"
+#include "../Thread.hpp"
+
+namespace ZeroTier {
+
+/**
+ * OSX Ethernet tap using ZeroTier kernel extension zt# devices
+ *
+ * This also installs a friendly-named network device in the system network
+ * configuration, permitting network devices to be seen and configured in
+ * the OSX system preferences app.
+ */
+class OSXEthernetTap : public EthernetTap
+{
+public:
+ OSXEthernetTap(
+ 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 ~OSXEthernetTap();
+
+ virtual void setEnabled(bool en);
+ virtual bool enabled() const;
+ virtual bool addIP(const InetAddress &ip);
+ virtual bool removeIP(const InetAddress &ip);
+ virtual std::set<InetAddress> ips() const;
+ virtual void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
+ virtual std::string deviceName() const;
+ virtual std::string persistentId() const;
+ virtual bool updateMulticastGroups(std::set<MulticastGroup> &groups);
+
+ void threadMain()
+ throw();
+
+private:
+ void (*_handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &);
+ void *_arg;
+ Thread _thread;
+ std::string _dev;
+ int _fd;
+ int _shutdownSignalPipe[2];
+ volatile bool _enabled;
+};
+
+} // namespace ZeroTier
+
+#endif
diff --git a/osnet/OSXEthernetTapFactory.cpp b/osnet/OSXEthernetTapFactory.cpp
new file mode 100644
index 00000000..4d0f2069
--- /dev/null
+++ b/osnet/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
diff --git a/osnet/OSXEthernetTapFactory.hpp b/osnet/OSXEthernetTapFactory.hpp
new file mode 100644
index 00000000..720e038a
--- /dev/null
+++ b/osnet/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
diff --git a/osnet/WindowsEthernetTap.cpp b/osnet/WindowsEthernetTap.cpp
new file mode 100644
index 00000000..8541ce7c
--- /dev/null
+++ b/osnet/WindowsEthernetTap.cpp
@@ -0,0 +1,837 @@
+/*
+ * 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 "../Constants.hpp"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <WinSock2.h>
+#include <Windows.h>
+#include <tchar.h>
+#include <winreg.h>
+#include <wchar.h>
+#include <ws2ipdef.h>
+#include <WS2tcpip.h>
+#include <IPHlpApi.h>
+#include <nldef.h>
+#include <netioapi.h>
+
+#include "../EthernetTap.hpp"
+#include "../Utils.hpp"
+#include "../Mutex.hpp"
+#include "WindowsEthernetTap.hpp"
+
+#include "..\windows\TapDriver\tap-windows.h"
+
+// ff:ff:ff:ff:ff:ff with no ADI
+static const ZeroTier::MulticastGroup _blindWildcardMulticastGroup(ZeroTier::MAC(0xff),0);
+
+namespace ZeroTier {
+
+// Helper function to get an adapter's LUID and index from its GUID. The LUID is
+// constant but the index can change, so go ahead and just look them both up by
+// the GUID which is constant. (The GUID is the instance ID in the registry.)
+static inline std::pair<NET_LUID,NET_IFINDEX> _findAdapterByGuid(const GUID &guid)
+ throw(std::runtime_error)
+{
+ MIB_IF_TABLE2 *ift = (MIB_IF_TABLE2 *)0;
+
+ if (GetIfTable2Ex(MibIfTableRaw,&ift) != NO_ERROR)
+ throw std::runtime_error("GetIfTable2Ex() failed");
+
+ for(ULONG i=0;i<ift->NumEntries;++i) {
+ if (ift->Table[i].InterfaceGuid == guid) {
+ std::pair<NET_LUID,NET_IFINDEX> tmp(ift->Table[i].InterfaceLuid,ift->Table[i].InterfaceIndex);
+ FreeMibTable(ift);
+ return tmp;
+ }
+ }
+
+ FreeMibTable(&ift);
+
+ throw std::runtime_error("interface not found");
+}
+
+// Only create or delete devices one at a time
+static Mutex _systemTapInitLock;
+
+// Compute some basic environment stuff on startup
+class _WinSysEnv
+{
+public:
+ _WinSysEnv()
+ {
+#ifdef _WIN64
+ is64Bit = TRUE;
+ devcon = "\\devcon_x64.exe";
+ tapDriver = "\\tap-windows\\x64\\zttap200.inf";
+#else
+ is64Bit = FALSE;
+ IsWow64Process(GetCurrentProcess(),&is64Bit);
+ devcon = ((is64Bit == TRUE) ? "\\devcon_x64.exe" : "\\devcon_x86.exe");
+ tapDriver = ((is64Bit == TRUE) ? "\\tap-windows\\x64\\zttap200.inf" : "\\tap-windows\\x86\\zttap200.inf");
+#endif
+ }
+ BOOL is64Bit;
+ const char *devcon;
+ const char *tapDriver;
+};
+static const _WinSysEnv _winEnv;
+
+static bool _disableTapDevice(const RuntimeEnvironment *_r,const std::string deviceInstanceId)
+{
+ HANDLE devconLog = CreateFileA((_r->homePath + "\\devcon.log").c_str(),GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
+ if (devconLog != INVALID_HANDLE_VALUE)
+ SetFilePointer(devconLog,0,0,FILE_END);
+
+ STARTUPINFOA startupInfo;
+ startupInfo.cb = sizeof(startupInfo);
+ if (devconLog != INVALID_HANDLE_VALUE) {
+ startupInfo.hStdOutput = devconLog;
+ startupInfo.hStdError = devconLog;
+ }
+ PROCESS_INFORMATION processInfo;
+ memset(&startupInfo,0,sizeof(STARTUPINFOA));
+ memset(&processInfo,0,sizeof(PROCESS_INFORMATION));
+ if (!CreateProcessA(NULL,(LPSTR)(std::string("\"") + _r->homePath + _winEnv.devcon + "\" disable @" + deviceInstanceId).c_str(),NULL,NULL,FALSE,0,NULL,NULL,&startupInfo,&processInfo)) {
+ if (devconLog != INVALID_HANDLE_VALUE)
+ CloseHandle(devconLog);
+ return false;
+ }
+ WaitForSingleObject(processInfo.hProcess,INFINITE);
+ CloseHandle(processInfo.hProcess);
+ CloseHandle(processInfo.hThread);
+
+ if (devconLog != INVALID_HANDLE_VALUE)
+ CloseHandle(devconLog);
+
+ return true;
+}
+static bool _enableTapDevice(const RuntimeEnvironment *_r,const std::string deviceInstanceId)
+{
+ HANDLE devconLog = CreateFileA((_r->homePath + "\\devcon.log").c_str(),GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
+ if (devconLog != INVALID_HANDLE_VALUE)
+ SetFilePointer(devconLog,0,0,FILE_END);
+
+ STARTUPINFOA startupInfo;
+ startupInfo.cb = sizeof(startupInfo);
+ if (devconLog != INVALID_HANDLE_VALUE) {
+ startupInfo.hStdOutput = devconLog;
+ startupInfo.hStdError = devconLog;
+ }
+ PROCESS_INFORMATION processInfo;
+ memset(&startupInfo,0,sizeof(STARTUPINFOA));
+ memset(&processInfo,0,sizeof(PROCESS_INFORMATION));
+ if (!CreateProcessA(NULL,(LPSTR)(std::string("\"") + _r->homePath + _winEnv.devcon + "\" enable @" + deviceInstanceId).c_str(),NULL,NULL,FALSE,0,NULL,NULL,&startupInfo,&processInfo)) {
+ if (devconLog != INVALID_HANDLE_VALUE)
+ CloseHandle(devconLog);
+ return false;
+ }
+ WaitForSingleObject(processInfo.hProcess,INFINITE);
+ CloseHandle(processInfo.hProcess);
+ CloseHandle(processInfo.hThread);
+
+ if (devconLog != INVALID_HANDLE_VALUE)
+ CloseHandle(devconLog);
+
+ return true;
+}
+
+static void _syncIpsWithRegistry(const std::set<InetAddress> &haveIps,const std::string netCfgInstanceId)
+{
+ // Update registry to contain all non-link-local IPs for this interface
+ std::string regMultiIps,regMultiNetmasks;
+ for(std::set<InetAddress>::const_iterator i(haveIps.begin());i!=haveIps.end();++i) {
+ if (!i->isLinkLocal()) {
+ regMultiIps.append(i->toIpString());
+ regMultiIps.push_back((char)0);
+ regMultiNetmasks.append(i->netmask().toIpString());
+ regMultiNetmasks.push_back((char)0);
+ }
+ }
+ HKEY tcpIpInterfaces;
+ if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,"SYSTEM\\CurrentControlSet\\services\\Tcpip\\Parameters\\Interfaces",0,KEY_READ|KEY_WRITE,&tcpIpInterfaces) == ERROR_SUCCESS) {
+ if (regMultiIps.length()) {
+ regMultiIps.push_back((char)0);
+ regMultiNetmasks.push_back((char)0);
+ RegSetKeyValueA(tcpIpInterfaces,netCfgInstanceId.c_str(),"IPAddress",REG_MULTI_SZ,regMultiIps.data(),(DWORD)regMultiIps.length());
+ RegSetKeyValueA(tcpIpInterfaces,netCfgInstanceId.c_str(),"SubnetMask",REG_MULTI_SZ,regMultiNetmasks.data(),(DWORD)regMultiNetmasks.length());
+ } else {
+ RegDeleteKeyValueA(tcpIpInterfaces,netCfgInstanceId.c_str(),"IPAddress");
+ RegDeleteKeyValueA(tcpIpInterfaces,netCfgInstanceId.c_str(),"SubnetMask");
+ }
+ }
+ RegCloseKey(tcpIpInterfaces);
+}
+
+WindowsEthernetTap::WindowsEthernetTap(
+ const RuntimeEnvironment *renv,
+ const char *tag,
+ const MAC &mac,
+ unsigned int mtu,
+ void (*handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &),
+ void *arg)
+ throw(std::runtime_error) :
+ EthernetTap("WindowsEthernetTap",mac,mtu),
+ _r(renv),
+ _handler(handler),
+ _arg(arg),
+ _tap(INVALID_HANDLE_VALUE),
+ _injectSemaphore(INVALID_HANDLE_VALUE),
+ _run(true),
+ _initialized(false),
+ _enabled(true)
+{
+ char subkeyName[4096];
+ char subkeyClass[4096];
+ char data[4096];
+
+ if (mtu > ZT_IF_MTU)
+ throw std::runtime_error("MTU too large for Windows tap");
+
+ Mutex::Lock _l(_systemTapInitLock);
+
+ HKEY nwAdapters;
+ if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,"SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}",0,KEY_READ|KEY_WRITE,&nwAdapters) != ERROR_SUCCESS)
+ throw std::runtime_error("unable to open registry key for network adapter enumeration");
+
+ std::set<std::string> existingDeviceInstances;
+ std::string mySubkeyName;
+
+ // Look for the tap instance that corresponds with our interface tag (network ID)
+ for(DWORD subkeyIndex=0;;++subkeyIndex) {
+ DWORD type;
+ DWORD dataLen;
+ DWORD subkeyNameLen = sizeof(subkeyName);
+ DWORD subkeyClassLen = sizeof(subkeyClass);
+ FILETIME lastWriteTime;
+ if (RegEnumKeyExA(nwAdapters,subkeyIndex,subkeyName,&subkeyNameLen,(DWORD *)0,subkeyClass,&subkeyClassLen,&lastWriteTime) == ERROR_SUCCESS) {
+ type = 0;
+ dataLen = sizeof(data);
+ if (RegGetValueA(nwAdapters,subkeyName,"ComponentId",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS) {
+ data[dataLen] = '\0';
+ if (!strnicmp(data,"zttap",5)) {
+ std::string instanceId;
+ type = 0;
+ dataLen = sizeof(data);
+ if (RegGetValueA(nwAdapters,subkeyName,"NetCfgInstanceId",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS) {
+ instanceId.assign(data,dataLen);
+ existingDeviceInstances.insert(instanceId);
+ }
+
+ std::string instanceIdPath;
+ type = 0;
+ dataLen = sizeof(data);
+ if (RegGetValueA(nwAdapters,subkeyName,"DeviceInstanceID",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS)
+ instanceIdPath.assign(data,dataLen);
+
+ if ((_netCfgInstanceId.length() == 0)&&(instanceId.length() != 0)&&(instanceIdPath.length() != 0)) {
+ type = 0;
+ dataLen = sizeof(data);
+ if (RegGetValueA(nwAdapters,subkeyName,"_ZeroTierTapIdentifier",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS) {
+ data[dataLen] = '\0';
+ if (!strcmp(data,tag)) {
+ _netCfgInstanceId = instanceId;
+ _deviceInstanceId = instanceIdPath;
+ mySubkeyName = subkeyName;
+ break; // found it!
+ }
+ }
+ }
+ }
+ }
+ } else break; // no more subkeys or error occurred enumerating them
+ }
+
+ // If there is no device, try to create one
+ if (_netCfgInstanceId.length() == 0) {
+ // Log devcon output to a file
+ HANDLE devconLog = CreateFileA((_r->homePath + "\\devcon.log").c_str(),GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
+ if (devconLog == INVALID_HANDLE_VALUE) {
+ LOG("WARNING: unable to open devcon.log");
+ } else {
+ SetFilePointer(devconLog,0,0,FILE_END);
+ }
+
+ // Execute devcon to install an instance of the Microsoft Loopback Adapter
+ STARTUPINFOA startupInfo;
+ startupInfo.cb = sizeof(startupInfo);
+ if (devconLog != INVALID_HANDLE_VALUE) {
+ SetFilePointer(devconLog,0,0,FILE_END);
+ startupInfo.hStdOutput = devconLog;
+ startupInfo.hStdError = devconLog;
+ }
+ PROCESS_INFORMATION processInfo;
+ memset(&startupInfo,0,sizeof(STARTUPINFOA));
+ memset(&processInfo,0,sizeof(PROCESS_INFORMATION));
+ if (!CreateProcessA(NULL,(LPSTR)(std::string("\"") + _r->homePath + _winEnv.devcon + "\" install \"" + _r->homePath + _winEnv.tapDriver + "\" zttap200").c_str(),NULL,NULL,FALSE,0,NULL,NULL,&startupInfo,&processInfo)) {
+ RegCloseKey(nwAdapters);
+ if (devconLog != INVALID_HANDLE_VALUE)
+ CloseHandle(devconLog);
+ throw std::runtime_error(std::string("unable to find or execute devcon at ") + _winEnv.devcon);
+ }
+ WaitForSingleObject(processInfo.hProcess,INFINITE);
+ CloseHandle(processInfo.hProcess);
+ CloseHandle(processInfo.hThread);
+
+ if (devconLog != INVALID_HANDLE_VALUE)
+ CloseHandle(devconLog);
+
+ // Scan for the new instance by simply looking for taps that weren't
+ // there originally. The static mutex we lock ensures this can't step
+ // on its own toes.
+ for(DWORD subkeyIndex=0;;++subkeyIndex) {
+ DWORD type;
+ DWORD dataLen;
+ DWORD subkeyNameLen = sizeof(subkeyName);
+ DWORD subkeyClassLen = sizeof(subkeyClass);
+ FILETIME lastWriteTime;
+ if (RegEnumKeyExA(nwAdapters,subkeyIndex,subkeyName,&subkeyNameLen,(DWORD *)0,subkeyClass,&subkeyClassLen,&lastWriteTime) == ERROR_SUCCESS) {
+ type = 0;
+ dataLen = sizeof(data);
+ if (RegGetValueA(nwAdapters,subkeyName,"ComponentId",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS) {
+ data[dataLen] = '\0';
+ if (!strnicmp(data,"zttap",5)) {
+ type = 0;
+ dataLen = sizeof(data);
+ if (RegGetValueA(nwAdapters,subkeyName,"NetCfgInstanceId",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS) {
+ if (existingDeviceInstances.count(std::string(data,dataLen)) == 0) {
+ RegSetKeyValueA(nwAdapters,subkeyName,"_ZeroTierTapIdentifier",REG_SZ,tag,(DWORD)(strlen(tag)+1));
+ _netCfgInstanceId.assign(data,dataLen);
+ type = 0;
+ dataLen = sizeof(data);
+ if (RegGetValueA(nwAdapters,subkeyName,"DeviceInstanceID",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS)
+ _deviceInstanceId.assign(data,dataLen);
+ mySubkeyName = subkeyName;
+
+ // Disable DHCP by default on newly created devices
+ HKEY tcpIpInterfaces;
+ if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,"SYSTEM\\CurrentControlSet\\services\\Tcpip\\Parameters\\Interfaces",0,KEY_READ|KEY_WRITE,&tcpIpInterfaces) == ERROR_SUCCESS) {
+ DWORD enable = 0;
+ RegSetKeyValueA(tcpIpInterfaces,_netCfgInstanceId.c_str(),"EnableDHCP",REG_DWORD,&enable,sizeof(enable));
+ RegCloseKey(tcpIpInterfaces);
+ }
+
+ break; // found it!
+ }
+ }
+ }
+ }
+ } else break; // no more keys or error occurred
+ }
+ }
+
+ if (_netCfgInstanceId.length() > 0) {
+ char tmps[4096];
+ unsigned int tmpsl = Utils::snprintf(tmps,sizeof(tmps),"%.2X-%.2X-%.2X-%.2X-%.2X-%.2X",(unsigned int)mac[0],(unsigned int)mac[1],(unsigned int)mac[2],(unsigned int)mac[3],(unsigned int)mac[4],(unsigned int)mac[5]) + 1;
+ RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"NetworkAddress",REG_SZ,tmps,tmpsl);
+ RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"MAC",REG_SZ,tmps,tmpsl);
+ DWORD tmp = mtu;
+ RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"MTU",REG_DWORD,(LPCVOID)&tmp,sizeof(tmp));
+ tmp = 0;
+ RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"EnableDHCP",REG_DWORD,(LPCVOID)&tmp,sizeof(tmp));
+ RegCloseKey(nwAdapters);
+ } else {
+ RegCloseKey(nwAdapters);
+ throw std::runtime_error("unable to find or create tap adapter");
+ }
+
+ // Convert device GUID junk... blech... is there an easier way to do this?
+ {
+ char nobraces[128];
+ const char *nbtmp1 = _netCfgInstanceId.c_str();
+ char *nbtmp2 = nobraces;
+ while (*nbtmp1) {
+ if ((*nbtmp1 != '{')&&(*nbtmp1 != '}'))
+ *nbtmp2++ = *nbtmp1;
+ ++nbtmp1;
+ }
+ *nbtmp2 = (char)0;
+ if (UuidFromStringA((RPC_CSTR)nobraces,&_deviceGuid) != RPC_S_OK)
+ throw std::runtime_error("unable to convert instance ID GUID to native GUID (invalid NetCfgInstanceId in registry?)");
+ }
+
+ // Start background thread that actually performs I/O
+ _injectSemaphore = CreateSemaphore(NULL,0,1,NULL);
+ _thread = Thread::start(this);
+
+ // Certain functions can now work (e.g. ips())
+ _initialized = true;
+}
+
+WindowsEthernetTap::~WindowsEthernetTap()
+{
+ _run = false;
+ ReleaseSemaphore(_injectSemaphore,1,NULL);
+ Thread::join(_thread);
+ CloseHandle(_injectSemaphore);
+ _disableTapDevice(_r,_deviceInstanceId);
+}
+
+void WindowsEthernetTap::setEnabled(bool en)
+{
+ _enabled = en;
+}
+
+bool WindowsEthernetTap::enabled() const
+{
+ return _enabled;
+}
+
+void WindowsEthernetTap::setDisplayName(const char *dn)
+{
+ if (!_initialized)
+ return;
+ HKEY ifp;
+ if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,(std::string("SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}\\") + _netCfgInstanceId).c_str(),0,KEY_READ|KEY_WRITE,&ifp) == ERROR_SUCCESS) {
+ RegSetKeyValueA(ifp,"Connection","Name",REG_SZ,(LPCVOID)dn,(DWORD)(strlen(dn)+1));
+ RegCloseKey(ifp);
+ }
+}
+
+bool WindowsEthernetTap::addIP(const InetAddress &ip)
+{
+ if (!_initialized)
+ return false;
+ if (!ip.netmaskBits()) // sanity check... netmask of 0.0.0.0 is WUT?
+ return false;
+
+ std::set<InetAddress> haveIps(ips());
+
+ try {
+ // Add IP to interface at the netlink level if not already assigned.
+ if (!haveIps.count(ip)) {
+ std::pair<NET_LUID,NET_IFINDEX> ifidx = _findAdapterByGuid(_deviceGuid);
+ MIB_UNICASTIPADDRESS_ROW ipr;
+
+ InitializeUnicastIpAddressEntry(&ipr);
+ if (ip.isV4()) {
+ ipr.Address.Ipv4.sin_family = AF_INET;
+ ipr.Address.Ipv4.sin_addr.S_un.S_addr = *((const uint32_t *)ip.rawIpData());
+ ipr.OnLinkPrefixLength = ip.port();
+ if (ipr.OnLinkPrefixLength >= 32)
+ return false;
+ } else if (ip.isV6()) {
+ ipr.Address.Ipv6.sin6_family = AF_INET6;
+ memcpy(ipr.Address.Ipv6.sin6_addr.u.Byte,ip.rawIpData(),16);
+ ipr.OnLinkPrefixLength = ip.port();
+ if (ipr.OnLinkPrefixLength >= 128)
+ return false;
+ } else return false;
+
+ ipr.PrefixOrigin = IpPrefixOriginManual;
+ ipr.SuffixOrigin = IpSuffixOriginManual;
+ ipr.ValidLifetime = 0xffffffff;
+ ipr.PreferredLifetime = 0xffffffff;
+
+ ipr.InterfaceLuid = ifidx.first;
+ ipr.InterfaceIndex = ifidx.second;
+
+ if (CreateUnicastIpAddressEntry(&ipr) == NO_ERROR) {
+ haveIps.insert(ip);
+ } else {
+ LOG("unable to add IP address %s to interface %s: %d",ip.toString().c_str(),deviceName().c_str(),(int)GetLastError());
+ return false;
+ }
+ }
+
+ _syncIpsWithRegistry(haveIps,_netCfgInstanceId);
+ } catch (std::exception &exc) {
+ LOG("unexpected exception adding IP address %s to %s: %s",ip.toString().c_str(),deviceName().c_str(),exc.what());
+ return false;
+ } catch ( ... ) {
+ LOG("unexpected exception adding IP address %s to %s: unknown exception",ip.toString().c_str(),deviceName().c_str());
+ return false;
+ }
+ return true;
+}
+
+bool WindowsEthernetTap::removeIP(const InetAddress &ip)
+{
+ if (!_initialized)
+ return false;
+ try {
+ MIB_UNICASTIPADDRESS_TABLE *ipt = (MIB_UNICASTIPADDRESS_TABLE *)0;
+ std::pair<NET_LUID,NET_IFINDEX> ifidx = _findAdapterByGuid(_deviceGuid);
+ if (GetUnicastIpAddressTable(AF_UNSPEC,&ipt) == NO_ERROR) {
+ for(DWORD i=0;i<ipt->NumEntries;++i) {
+ if ((ipt->Table[i].InterfaceLuid.Value == ifidx.first.Value)&&(ipt->Table[i].InterfaceIndex == ifidx.second)) {
+ InetAddress addr;
+ switch(ipt->Table[i].Address.si_family) {
+ case AF_INET:
+ addr.set(&(ipt->Table[i].Address.Ipv4.sin_addr.S_un.S_addr),4,ipt->Table[i].OnLinkPrefixLength);
+ break;
+ case AF_INET6:
+ addr.set(ipt->Table[i].Address.Ipv6.sin6_addr.u.Byte,16,ipt->Table[i].OnLinkPrefixLength);
+ if (addr.isLinkLocal())
+ continue; // can't remove link-local IPv6 addresses
+ break;
+ }
+ if (addr == ip) {
+ DeleteUnicastIpAddressEntry(&(ipt->Table[i]));
+ FreeMibTable(ipt);
+ _syncIpsWithRegistry(ips(),_netCfgInstanceId);
+ return true;
+ }
+ }
+ }
+ FreeMibTable((PVOID)ipt);
+ }
+ } catch (std::exception &exc) {
+ LOG("unexpected exception removing IP address %s from %s: %s",ip.toString().c_str(),deviceName().c_str(),exc.what());
+ } catch ( ... ) {
+ LOG("unexpected exception removing IP address %s from %s: unknown exception",ip.toString().c_str(),deviceName().c_str());
+ }
+ return false;
+}
+
+std::set<InetAddress> WindowsEthernetTap::ips() const
+{
+ static const InetAddress linkLocalLoopback("fe80::1",64); // what is this and why does Windows assign it?
+ std::set<InetAddress> addrs;
+
+ if (!_initialized)
+ return addrs;
+
+ try {
+ MIB_UNICASTIPADDRESS_TABLE *ipt = (MIB_UNICASTIPADDRESS_TABLE *)0;
+ std::pair<NET_LUID,NET_IFINDEX> ifidx = _findAdapterByGuid(_deviceGuid);
+
+ if (GetUnicastIpAddressTable(AF_UNSPEC,&ipt) == NO_ERROR) {
+ for(DWORD i=0;i<ipt->NumEntries;++i) {
+ if ((ipt->Table[i].InterfaceLuid.Value == ifidx.first.Value)&&(ipt->Table[i].InterfaceIndex == ifidx.second)) {
+ switch(ipt->Table[i].Address.si_family) {
+ case AF_INET: {
+ InetAddress ip(&(ipt->Table[i].Address.Ipv4.sin_addr.S_un.S_addr),4,ipt->Table[i].OnLinkPrefixLength);
+ if (ip != InetAddress::LO4)
+ addrs.insert(ip);
+ } break;
+ case AF_INET6: {
+ InetAddress ip(ipt->Table[i].Address.Ipv6.sin6_addr.u.Byte,16,ipt->Table[i].OnLinkPrefixLength);
+ if ((ip != linkLocalLoopback)&&(ip != InetAddress::LO6))
+ addrs.insert(ip);
+ } break;
+ }
+ }
+ }
+ FreeMibTable(ipt);
+ }
+ } catch ( ... ) {} // sanity check, shouldn't happen unless out of memory
+
+ return addrs;
+}
+
+void WindowsEthernetTap::put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len)
+{
+ if ((!_initialized)||(!_enabled)||(_tap == INVALID_HANDLE_VALUE)||(len > (ZT_IF_MTU)))
+ return;
+ {
+ Mutex::Lock _l(_injectPending_m);
+ _injectPending.push( std::pair<Array<char,ZT_IF_MTU + 32>,unsigned int>(Array<char,ZT_IF_MTU + 32>(),len + 14) );
+ char *d = _injectPending.back().first.data;
+ to.copyTo(d,6);
+ from.copyTo(d + 6,6);
+ d[12] = (char)((etherType >> 8) & 0xff);
+ d[13] = (char)(etherType & 0xff);
+ memcpy(d + 14,data,len);
+ }
+ ReleaseSemaphore(_injectSemaphore,1,NULL);
+}
+
+std::string WindowsEthernetTap::deviceName() const
+{
+ return _netCfgInstanceId;
+}
+
+std::string WindowsEthernetTap::persistentId() const
+{
+ return _deviceInstanceId;
+}
+
+bool WindowsEthernetTap::updateMulticastGroups(std::set<MulticastGroup> &groups)
+{
+ if (!_initialized)
+ return false;
+ HANDLE t = _tap;
+ if (t == INVALID_HANDLE_VALUE)
+ return false;
+
+ std::set<MulticastGroup> newGroups;
+
+ // Ensure that groups are added for each IP... this handles the MAC:ADI
+ // groups that are created from IPv4 addresses. Some of these may end
+ // up being duplicates of what the IOCTL returns but that's okay since
+ // the set<> will filter that.
+ std::set<InetAddress> ipaddrs(ips());
+ for(std::set<InetAddress>::const_iterator i(ipaddrs.begin());i!=ipaddrs.end();++i)
+ newGroups.insert(MulticastGroup::deriveMulticastGroupForAddressResolution(*i));
+
+ // The ZT1 tap driver supports an IOCTL to get multicast memberships at the L2
+ // level... something Windows does not seem to expose ordinarily. This lets
+ // pretty much anything work... IPv4, IPv6, IPX, oldskool Netbios, who knows...
+ unsigned char mcastbuf[TAP_WIN_IOCTL_GET_MULTICAST_MEMBERSHIPS_OUTPUT_BUF_SIZE];
+ DWORD bytesReturned = 0;
+ if (DeviceIoControl(t,TAP_WIN_IOCTL_GET_MULTICAST_MEMBERSHIPS,(LPVOID)0,0,(LPVOID)mcastbuf,sizeof(mcastbuf),&bytesReturned,NULL)) {
+ MAC mac;
+ DWORD i = 0;
+ while ((i + 6) <= bytesReturned) {
+ mac.setTo(mcastbuf + i,6);
+ i += 6;
+ if ((mac.isMulticast())&&(!mac.isBroadcast())) {
+ // exclude the nulls that may be returned or any other junk Windows puts in there
+ newGroups.insert(MulticastGroup(mac,0));
+ }
+ }
+ }
+
+ bool changed = false;
+
+ for(std::set<MulticastGroup>::iterator mg(newGroups.begin());mg!=newGroups.end();++mg) {
+ if (!groups.count(*mg)) {
+ groups.insert(*mg);
+ changed = true;
+ }
+ }
+ for(std::set<MulticastGroup>::iterator mg(groups.begin());mg!=groups.end();) {
+ if ((!newGroups.count(*mg))&&(*mg != _blindWildcardMulticastGroup)) {
+ groups.erase(mg++);
+ changed = true;
+ } else ++mg;
+ }
+
+ return changed;
+}
+
+void WindowsEthernetTap::threadMain()
+ throw()
+{
+ char tapPath[256];
+ OVERLAPPED tapOvlRead,tapOvlWrite;
+ HANDLE wait4[3];
+ char *tapReadBuf = (char *)0;
+
+ // Shouldn't be needed, but Windows does not overcommit. This Windows
+ // tap code is defensive to schizoid paranoia degrees.
+ while (!tapReadBuf) {
+ tapReadBuf = (char *)::malloc(ZT_IF_MTU + 32);
+ if (!tapReadBuf)
+ Sleep(1000);
+ }
+
+ // Tap is in this weird Windows global pseudo file space
+ Utils::snprintf(tapPath,sizeof(tapPath),"\\\\.\\Global\\%s.tap",_netCfgInstanceId.c_str());
+
+ // More insanity: repetatively try to enable/disable tap device. The first
+ // time we succeed, close it and do it again. This is to fix a driver init
+ // bug that seems to be extremely non-deterministic and to only occur after
+ // headless MSI upgrade. It cannot be reproduced in any other circumstance.
+ bool throwOneAway = true;
+ while (_run) {
+ _disableTapDevice(_r,_deviceInstanceId);
+ Sleep(250);
+ if (!_enableTapDevice(_r,_deviceInstanceId)) {
+ ::free(tapReadBuf);
+ _enabled = false;
+ return; // only happens if devcon is missing or totally fails
+ }
+ Sleep(250);
+
+ _tap = CreateFileA(tapPath,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_SYSTEM|FILE_FLAG_OVERLAPPED,NULL);
+ if (_tap == INVALID_HANDLE_VALUE) {
+ Sleep(500);
+ continue;
+ }
+
+ uint32_t tmpi = 1;
+ DWORD bytesReturned = 0;
+ DeviceIoControl(_tap,TAP_WIN_IOCTL_SET_MEDIA_STATUS,&tmpi,sizeof(tmpi),&tmpi,sizeof(tmpi),&bytesReturned,NULL);
+
+ if (throwOneAway) {
+ throwOneAway = false;
+ CloseHandle(_tap);
+ _tap = INVALID_HANDLE_VALUE;
+ Sleep(250);
+ continue;
+ } else break;
+ }
+
+ memset(&tapOvlRead,0,sizeof(tapOvlRead));
+ tapOvlRead.hEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
+ memset(&tapOvlWrite,0,sizeof(tapOvlWrite));
+ tapOvlWrite.hEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
+
+ wait4[0] = _injectSemaphore;
+ wait4[1] = tapOvlRead.hEvent;
+ wait4[2] = tapOvlWrite.hEvent; // only included if writeInProgress is true
+
+ // Start overlapped read, which is always active
+ ReadFile(_tap,tapReadBuf,sizeof(tapReadBuf),NULL,&tapOvlRead);
+ bool writeInProgress = false;
+
+ for(;;) {
+ if (!_run) break;
+ DWORD r = WaitForMultipleObjectsEx(writeInProgress ? 3 : 2,wait4,FALSE,5000,TRUE);
+ if (!_run) break;
+
+ if ((r == WAIT_TIMEOUT)||(r == WAIT_FAILED))
+ continue;
+
+ if (HasOverlappedIoCompleted(&tapOvlRead)) {
+ DWORD bytesRead = 0;
+ if (GetOverlappedResult(_tap,&tapOvlRead,&bytesRead,FALSE)) {
+ if ((bytesRead > 14)&&(_enabled)) {
+ MAC to(tapReadBuf,6);
+ MAC from(tapReadBuf + 6,6);
+ unsigned int etherType = ((((unsigned int)tapReadBuf[12]) & 0xff) << 8) | (((unsigned int)tapReadBuf[13]) & 0xff);
+ try {
+ Buffer<4096> tmp(tapReadBuf + 14,bytesRead - 14);
+ _handler(_arg,from,to,etherType,tmp);
+ } catch ( ... ) {} // handlers should not throw
+ }
+ }
+ ReadFile(_tap,tapReadBuf,ZT_IF_MTU + 32,NULL,&tapOvlRead);
+ }
+
+ if (writeInProgress) {
+ if (HasOverlappedIoCompleted(&tapOvlWrite)) {
+ writeInProgress = false;
+ _injectPending_m.lock();
+ _injectPending.pop();
+ } else continue; // still writing, so skip code below and wait
+ } else _injectPending_m.lock();
+
+ if (!_injectPending.empty()) {
+ WriteFile(_tap,_injectPending.front().first.data,_injectPending.front().second,NULL,&tapOvlWrite);
+ writeInProgress = true;
+ }
+
+ _injectPending_m.unlock();
+ }
+
+ CancelIo(_tap);
+
+ CloseHandle(tapOvlRead.hEvent);
+ CloseHandle(tapOvlWrite.hEvent);
+ CloseHandle(_tap);
+ _tap = INVALID_HANDLE_VALUE;
+
+ ::free(tapReadBuf);
+}
+
+bool WindowsEthernetTap::deletePersistentTapDevice(const RuntimeEnvironment *_r,const char *pid)
+{
+ Mutex::Lock _l(_systemTapInitLock); // only one thread may mess with taps at a time, process-wide
+
+ HANDLE devconLog = CreateFileA((_r->homePath + "\\devcon.log").c_str(),GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
+ STARTUPINFOA startupInfo;
+ startupInfo.cb = sizeof(startupInfo);
+ if (devconLog != INVALID_HANDLE_VALUE) {
+ SetFilePointer(devconLog,0,0,FILE_END);
+ startupInfo.hStdOutput = devconLog;
+ startupInfo.hStdError = devconLog;
+ }
+ PROCESS_INFORMATION processInfo;
+ memset(&startupInfo,0,sizeof(STARTUPINFOA));
+ memset(&processInfo,0,sizeof(PROCESS_INFORMATION));
+ if (CreateProcessA(NULL,(LPSTR)(std::string("\"") + _r->homePath + _winEnv.devcon + "\" remove @" + pid).c_str(),NULL,NULL,FALSE,0,NULL,NULL,&startupInfo,&processInfo)) {
+ WaitForSingleObject(processInfo.hProcess,INFINITE);
+ CloseHandle(processInfo.hProcess);
+ CloseHandle(processInfo.hThread);
+ if (devconLog != INVALID_HANDLE_VALUE)
+ CloseHandle(devconLog);
+ return true;
+ }
+ if (devconLog != INVALID_HANDLE_VALUE)
+ CloseHandle(devconLog);
+
+ return false;
+}
+
+int WindowsEthernetTap::cleanPersistentTapDevices(const RuntimeEnvironment *_r,const std::set<std::string> &exceptThese,bool alsoRemoveUnassociatedDevices)
+{
+ char subkeyName[4096];
+ char subkeyClass[4096];
+ char data[4096];
+
+ std::set<std::string> instanceIdPathsToRemove;
+ {
+ Mutex::Lock _l(_systemTapInitLock); // only one thread may mess with taps at a time, process-wide
+
+ HKEY nwAdapters;
+ if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,"SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}",0,KEY_READ|KEY_WRITE,&nwAdapters) != ERROR_SUCCESS)
+ return -1;
+
+ for(DWORD subkeyIndex=0;;++subkeyIndex) {
+ DWORD type;
+ DWORD dataLen;
+ DWORD subkeyNameLen = sizeof(subkeyName);
+ DWORD subkeyClassLen = sizeof(subkeyClass);
+ FILETIME lastWriteTime;
+ if (RegEnumKeyExA(nwAdapters,subkeyIndex,subkeyName,&subkeyNameLen,(DWORD *)0,subkeyClass,&subkeyClassLen,&lastWriteTime) == ERROR_SUCCESS) {
+ type = 0;
+ dataLen = sizeof(data);
+ if (RegGetValueA(nwAdapters,subkeyName,"ComponentId",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS) {
+ data[dataLen] = '\0';
+ if (!strnicmp(data,"zttap",5)) {
+ std::string instanceIdPath;
+ type = 0;
+ dataLen = sizeof(data);
+ if (RegGetValueA(nwAdapters,subkeyName,"DeviceInstanceID",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS)
+ instanceIdPath.assign(data,dataLen);
+ if (instanceIdPath.length() != 0) {
+ type = 0;
+ dataLen = sizeof(data);
+ if (RegGetValueA(nwAdapters,subkeyName,"_ZeroTierTapIdentifier",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS) {
+ if (dataLen <= 0) {
+ if (alsoRemoveUnassociatedDevices)
+ instanceIdPathsToRemove.insert(instanceIdPath);
+ } else {
+ if (!exceptThese.count(std::string(data,dataLen)))
+ instanceIdPathsToRemove.insert(instanceIdPath);
+ }
+ } else if (alsoRemoveUnassociatedDevices)
+ instanceIdPathsToRemove.insert(instanceIdPath);
+ }
+ }
+ }
+ } else break; // end of list or failure
+ }
+
+ RegCloseKey(nwAdapters);
+ }
+
+ int removed = 0;
+ for(std::set<std::string>::iterator iidp(instanceIdPathsToRemove.begin());iidp!=instanceIdPathsToRemove.end();++iidp) {
+ if (deletePersistentTapDevice(_r,iidp->c_str()))
+ ++removed;
+ }
+ return removed;
+}
+
+} // namespace ZeroTier
diff --git a/osnet/WindowsEthernetTap.hpp b/osnet/WindowsEthernetTap.hpp
new file mode 100644
index 00000000..74c56621
--- /dev/null
+++ b/osnet/WindowsEthernetTap.hpp
@@ -0,0 +1,130 @@
+/*
+ * 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_WINDOWSETHERNETTAP_HPP
+#define ZT_WINDOWSETHERNETTAP_HPP
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <string>
+#include <queue>
+#include <stdexcept>
+
+#include "../Constants.hpp"
+#include "../EthernetTap.hpp"
+#include "../Mutex.hpp"
+#include "../Thread.hpp"
+#include "../Array.hpp"
+
+namespace ZeroTier {
+
+/**
+ * Windows Ethernet tap device using bundled ztTap driver
+ */
+class WindowsEthernetTap : public EthernetTap
+{
+public:
+ /**
+ * Open tap device, installing and creating one if it does not exist
+ *
+ * @param renv Runtime environment
+ * @param tag A tag (presently the hex network ID) used to identify persistent tap devices in the registry
+ * @param mac MAC address of device
+ * @param mtu MTU of device
+ * @param desc If non-NULL, a description (not used on all OSes)
+ * @param handler Handler function to be called when data is received from the tap
+ * @param arg First argument to handler function
+ * @throws std::runtime_error Unable to allocate device
+ */
+ WindowsEthernetTap(
+ const RuntimeEnvironment *renv,
+ const char *tag,
+ const MAC &mac,
+ unsigned int mtu,
+ void (*handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &),
+ void *arg)
+ throw(std::runtime_error);
+
+ virtual ~WindowsEthernetTap();
+
+ virtual void setEnabled(bool en);
+ virtual bool enabled() const;
+ virtual void setDisplayName(const char *dn);
+ virtual bool addIP(const InetAddress &ip);
+ virtual bool removeIP(const InetAddress &ip);
+ virtual std::set<InetAddress> ips() const;
+ virtual void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
+ virtual std::string deviceName() const;
+ virtual std::string persistentId() const;
+ virtual bool updateMulticastGroups(std::set<MulticastGroup> &groups);
+
+ /**
+ * Thread main method; do not call elsewhere
+ */
+ void threadMain()
+ throw();
+
+ /**
+ * Remove persistent tap device by device name
+ *
+ * @param _r Runtime environment
+ * @param pdev Device name as returned by persistentId() while tap is running
+ * @return True if a device was deleted
+ */
+ static bool deletePersistentTapDevice(const RuntimeEnvironment *_r,const char *pid);
+
+ /**
+ * Clean persistent tap devices that are not in the supplied set
+ *
+ * @param _r Runtime environment
+ * @param exceptThese Devices to leave in place
+ * @param alsoRemoveUnassociatedDevices If true, remove devices not associated with any network as well
+ * @return Number of devices deleted or -1 if an error prevented the operation from being performed
+ */
+ static int cleanPersistentTapDevices(const RuntimeEnvironment *_r,const std::set<std::string> &exceptThese,bool alsoRemoveUnassociatedDevices);
+
+private:
+ void (*_handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &);
+ void *_arg;
+ Thread _thread;
+
+ volatile HANDLE _tap;
+ HANDLE _injectSemaphore;
+ GUID _deviceGuid;
+ std::string _netCfgInstanceId; // NetCfgInstanceId, a GUID
+ std::string _deviceInstanceId; // DeviceInstanceID, another kind of "instance ID"
+ std::queue< std::pair< Array<char,ZT_IF_MTU + 32>,unsigned int > > _injectPending;
+ Mutex _injectPending_m;
+ volatile bool _run;
+ volatile bool _initialized;
+ volatile bool _enabled;
+};
+
+} // namespace ZeroTier
+
+#endif
diff --git a/osnet/WindowsEthernetTapFactory.cpp b/osnet/WindowsEthernetTapFactory.cpp
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/osnet/WindowsEthernetTapFactory.cpp
diff --git a/osnet/WindowsEthernetTapFactory.hpp b/osnet/WindowsEthernetTapFactory.hpp
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/osnet/WindowsEthernetTapFactory.hpp
diff --git a/osnet/WindowsRoutingTable.cpp b/osnet/WindowsRoutingTable.cpp
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/osnet/WindowsRoutingTable.cpp
diff --git a/osnet/WindowsRoutingTable.hpp b/osnet/WindowsRoutingTable.hpp
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/osnet/WindowsRoutingTable.hpp
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-23 08:23:47 +0000