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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 <vector>
#include "Constants.hpp"
#ifdef __WINDOWS__
#include <WinSock2.h>
#include <Windows.h>
#endif
#include "Demarc.hpp"
#include "RuntimeEnvironment.hpp"
#include "Logger.hpp"
#include "UdpSocket.hpp"
#include "InetAddress.hpp"
#include "Switch.hpp"
#include "Buffer.hpp"
#include "CMWC4096.hpp"
namespace ZeroTier {
const Demarc::Port Demarc::ANY_PORT = (Port)0xffffffffffffffffULL;
const Demarc::Port Demarc::NULL_PORT = (Port)0;
Demarc::Demarc(const RuntimeEnvironment *renv) :
_r(renv)
{
}
Demarc::~Demarc()
{
for(std::map< Port,DemarcPortObj >::iterator pe(_ports.begin());pe!=_ports.end();++pe) {
switch (pe->second.type) {
case PORT_TYPE_UDP_SOCKET_V4:
case PORT_TYPE_UDP_SOCKET_V6:
delete ((UdpSocket *)pe->second.obj);
break;
case PORT_TYPE_LOCAL_ETHERNET:
case PORT_TYPE_RELAY_TUNNEL:
break;
}
}
}
std::string Demarc::describe(Demarc::Port p)
{
char buf[64];
switch ((DemarcPortType)(((uint64_t)p) >> 60)) {
case PORT_TYPE_UDP_SOCKET_V4:
Utils::snprintf(buf,sizeof(buf),"udp/4/%d",(int)((uint64_t)p & 0xffff));
return std::string(buf);
case PORT_TYPE_UDP_SOCKET_V6:
Utils::snprintf(buf,sizeof(buf),"udp/6/%d",(int)((uint64_t)p & 0xffff));
return std::string(buf);
case PORT_TYPE_LOCAL_ETHERNET:
return std::string("ethernet");
case PORT_TYPE_RELAY_TUNNEL:
return std::string("relay");
}
return std::string("(null)");
}
bool Demarc::has(Port p) const
throw()
{
Mutex::Lock _l(_ports_m);
return (_ports.count(p) != 0);
}
bool Demarc::bindLocalUdp(unsigned int localPort)
{
Mutex::Lock _l(_ports_m);
uint64_t v4p = ((uint64_t)PORT_TYPE_UDP_SOCKET_V4 << 60) | (uint64_t)localPort;
uint64_t v6p = ((uint64_t)PORT_TYPE_UDP_SOCKET_V6 << 60) | (uint64_t)localPort;
if ((_ports.count((Port)v4p))||(_ports.count((Port)v6p)))
return true; // port already bound
UdpSocket *v4 = (UdpSocket *)0;
try {
DemarcPortObj *v4r = &(_ports[(Port)v4p]);
v4r->port = (Port)v4p;
v4r->parent = this;
v4r->obj = v4 = new UdpSocket(false,localPort,false,&Demarc::_CBudpSocketPacketHandler,v4r);
v4r->type = PORT_TYPE_UDP_SOCKET_V4;
} catch ( ... ) {
_ports.erase((Port)v4p);
v4 = (UdpSocket *)0;
}
UdpSocket *v6 = (UdpSocket *)0;
try {
DemarcPortObj *v6r = &(_ports[(Port)v6p]);
v6r->port = (Port)v6p;
v6r->parent = this;
v6r->obj = v6 = new UdpSocket(false,localPort,true,&Demarc::_CBudpSocketPacketHandler,v6r);
v6r->type = PORT_TYPE_UDP_SOCKET_V6;
} catch ( ... ) {
_ports.erase((Port)v6p);
v6 = (UdpSocket *)0;
}
return ((v4)||(v6));
}
Demarc::Port Demarc::pick(const InetAddress &to) const
throw()
{
Mutex::Lock _l(_ports_m);
try {
std::vector< std::map< Port,DemarcPortObj >::const_iterator > possibilities;
for(std::map< Port,DemarcPortObj >::const_iterator pe(_ports.begin());pe!=_ports.end();++pe) {
switch (pe->second.type) {
case PORT_TYPE_UDP_SOCKET_V4:
if (to.isV4())
possibilities.push_back(pe);
break;
case PORT_TYPE_UDP_SOCKET_V6:
if (to.isV6())
possibilities.push_back(pe);
break;
default:
break;
}
}
if (possibilities.size())
return possibilities[_r->prng->next32() % possibilities.size()]->first;
else return NULL_PORT;
} catch ( ... ) {
return NULL_PORT;
}
}
Demarc::Port Demarc::send(Demarc::Port fromPort,const InetAddress &to,const void *data,unsigned int len,int hopLimit) const
throw()
{
_ports_m.lock();
std::map< Port,DemarcPortObj >::const_iterator pe(_ports.find(fromPort));
if (pe == _ports.end()) {
try {
std::vector< std::map< Port,DemarcPortObj >::const_iterator > possibilities;
for(pe=_ports.begin();pe!=_ports.end();++pe) {
switch (pe->second.type) {
case PORT_TYPE_UDP_SOCKET_V4:
if (to.isV4())
possibilities.push_back(pe);
break;
case PORT_TYPE_UDP_SOCKET_V6:
if (to.isV6())
possibilities.push_back(pe);
break;
default:
break;
}
}
if (possibilities.size())
pe = possibilities[_r->prng->next32() % possibilities.size()];
else {
_ports_m.unlock();
return NULL_PORT;
}
} catch ( ... ) {
_ports_m.unlock();
return NULL_PORT;
}
}
switch (pe->second.type) {
case PORT_TYPE_UDP_SOCKET_V4:
case PORT_TYPE_UDP_SOCKET_V6:
_ports_m.unlock();
if (((UdpSocket *)pe->second.obj)->send(to,data,len,hopLimit))
return pe->first;
return NULL_PORT;
default:
break;
}
_ports_m.unlock();
return NULL_PORT;
}
void Demarc::_CBudpSocketPacketHandler(UdpSocket *sock,void *arg,const InetAddress &from,const void *data,unsigned int len)
{
if (!((DemarcPortObj *)arg)->parent->_r->shutdownInProgress)
((DemarcPortObj *)arg)->parent->_r->sw->onRemotePacket(((DemarcPortObj *)arg)->port,from,Buffer<4096>(data,len));
}
} // namespace ZeroTier
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