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Move node/osdep/ to sys/

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Adam Ierymenko 2014-07-26 13:10:41 -07:00
parent 27aa6ea44e
commit 538e8a86c8
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329
node/osdep/BSDRoutingTable.cpp
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@ -1,329 +0,0 @@
/*
* 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

51
node/osdep/BSDRoutingTable.hpp
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@ -1,51 +0,0 @@
/*
* 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

474
node/osdep/LinuxEthernetTap.cpp
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/*
* 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

85
node/osdep/LinuxEthernetTap.hpp
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@ -1,85 +0,0 @@
/*
* 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

83
node/osdep/LinuxEthernetTapFactory.cpp
View file

@ -1,83 +0,0 @@
/*
* 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

64
node/osdep/LinuxEthernetTapFactory.hpp
View file

@ -1,64 +0,0 @@
/*
* 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

247
node/osdep/LinuxRoutingTable.cpp
View file

@ -1,247 +0,0 @@
/*
* 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

49
node/osdep/LinuxRoutingTable.hpp
View file

@ -1,49 +0,0 @@
/*
* 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

634
node/osdep/OSXEthernetTap.cpp
View file

@ -1,634 +0,0 @@
/*
* 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

89
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@ -1,89 +0,0 @@
/*
* 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

126
node/osdep/OSXEthernetTapFactory.cpp
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@ -1,126 +0,0 @@
/*
* 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

77
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@ -1,77 +0,0 @@
/*
* 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

837
node/osdep/WindowsEthernetTap.cpp
View file

@ -1,837 +0,0 @@
/*
* 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

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node/osdep/WindowsEthernetTap.hpp
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@ -1,130 +0,0 @@
/*
* 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

0
node/osdep/WindowsEthernetTapFactory.cpp
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0
node/osdep/WindowsEthernetTapFactory.hpp
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0
node/osdep/WindowsRoutingTable.cpp
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0
node/osdep/WindowsRoutingTable.hpp
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