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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/
*/
#ifndef ZT_UNIXETHERNETTAP_HPP
#define ZT_UNIXETHERNETTAP_HPP
#include <stdio.h>
#include <stdlib.h>
#include <stdexcept>
#include "EthernetTap.hpp"
#include "Mutex.hpp"
#include "Thread.hpp"
namespace ZeroTier {
class RuntimeEnvironment;
/**
* Tap device using Unix taps (contains special case code for Linux, OSX, etc. but they're all similar)
*/
class UnixEthernetTap : public EthernetTap
{
public:
/**
* Construct a new TAP device
*
* Handler arguments: arg,from,to,etherType,data
*
* @param renv Runtime environment
* @param tryToGetDevice Unix device name (e.g. zt0)
* @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 tap device
*/
UnixEthernetTap(
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);
virtual ~UnixEthernetTap();
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();
private:
const RuntimeEnvironment *_r;
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
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