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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 "TestEthernetTap.hpp"
#include "TestEthernetTapFactory.hpp"
#include "../node/Constants.hpp"
#include "../node/Utils.hpp"
#include <stdio.h>
#include <stdlib.h>
#ifdef __WINDOWS__
#include <process.h>
#else
#include <unistd.h>
#endif
namespace ZeroTier {
static Mutex printLock;
TestEthernetTap::TestEthernetTap(
TestEthernetTapFactory *parent,
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) :
EthernetTap("TestEthernetTap",mac,mtu,metric),
_parent(parent),
_handler(handler),
_arg(arg),
_enabled(true)
{
static volatile unsigned int testTapCounter = 0;
char tmp[64];
int pid = 0;
#ifdef __UNIX_LIKE__
pid = (int)getpid();
#endif
#ifdef __WINDOWS__
pid = (int)_getpid();
#endif
Utils::snprintf(tmp,sizeof(tmp),"test%dtap%d",pid,testTapCounter++);
_dev = tmp;
_thread = Thread::start(this);
}
TestEthernetTap::~TestEthernetTap()
{
{
Mutex::Lock _l(_pq_m);
_pq.push(TestFrame()); // 0 length frame = exit
}
_pq_c.signal();
Thread::join(_thread);
}
void TestEthernetTap::setEnabled(bool en)
{
_enabled = en;
}
bool TestEthernetTap::enabled() const
{
return _enabled;
}
bool TestEthernetTap::addIP(const InetAddress &ip)
{
return true;
}
bool TestEthernetTap::removeIP(const InetAddress &ip)
{
return true;
}
std::set<InetAddress> TestEthernetTap::ips() const
{
return std::set<InetAddress>();
}
void TestEthernetTap::put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len)
{
Mutex::Lock _l(printLock);
fprintf(stdout,"[%s] %s << %s %.4x %s"ZT_EOL_S,_dev.c_str(),to.toString().c_str(),from.toString().c_str(),etherType,std::string((const char *)data,len).c_str());
fflush(stdout);
}
std::string TestEthernetTap::deviceName() const
{
return _dev;
}
void TestEthernetTap::setFriendlyName(const char *friendlyName)
{
}
bool TestEthernetTap::updateMulticastGroups(std::set<MulticastGroup> &groups)
{
return false;
}
bool TestEthernetTap::injectPacketFromHost(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len)
{
if ((len == 0)||(len > 2800))
return false;
{
Mutex::Lock _l(_pq_m);
_pq.push(TestFrame(from,to,data,etherType & 0xffff,len));
}
_pq_c.signal();
{
Mutex::Lock _l(printLock);
fprintf(stdout,"[%s] %s >> %s %.4x %s"ZT_EOL_S,_dev.c_str(),from.toString().c_str(),to.toString().c_str(),etherType,std::string((const char *)data,len).c_str());
fflush(stdout);
}
return true;
}
void TestEthernetTap::threadMain()
throw()
{
TestFrame tf;
for(;;) {
tf.len = 0;
{
Mutex::Lock _l(_pq_m);
if (!_pq.empty()) {
if (_pq.front().len == 0)
break;
memcpy(&tf,&(_pq.front()),sizeof(tf));
_pq.pop();
}
}
if ((tf.len > 0)&&(_enabled))
_handler(_arg,tf.from,tf.to,tf.etherType,Buffer<4096>(tf.data,tf.len));
_pq_c.wait();
}
}
} // namespace ZeroTier
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