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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2018 ZeroTier, Inc. https://www.zerotier.com/
*
* 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/>.
*
* --
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial closed-source software that incorporates or links
* directly against ZeroTier software without disclosing the source code
* of your own application.
*/
#ifndef ZT_LINUX_NETLINK_HPP
#define ZT_LINUX_NETLINK_HPP
#include <vector>
#include <sys/socket.h>
#include <asm/types.h>
#include <linux/rtnetlink.h>
#include <sys/socket.h>
#include <linux/if.h>
#include "../node/InetAddress.hpp"
#include "../node/MAC.hpp"
#include "Thread.hpp"
#include "../node/Hashtable.hpp"
#include "../node/Mutex.hpp"
namespace ZeroTier {
struct route_entry {
InetAddress target;
InetAddress via;
int if_index;
char iface[IFNAMSIZ];
};
typedef std::vector<route_entry> RouteList;
/**
* Interface with Linux's RTNETLINK
*/
class LinuxNetLink
{
private:
LinuxNetLink();
~LinuxNetLink();
public:
static LinuxNetLink& getInstance()
{
static LinuxNetLink instance;
return instance;
}
LinuxNetLink(LinuxNetLink const&) = delete;
void operator=(LinuxNetLink const&) = delete;
void addRoute(const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *ifaceName);
void delRoute(const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *ifaceName);
RouteList getIPV4Routes() const;
RouteList getIPV6Routes() const;
void addAddress(const InetAddress &addr, const char *iface);
void removeAddress(const InetAddress &addr, const char *iface);
void threadMain() throw();
private:
int _doRecv(int fd);
void _processMessage(struct nlmsghdr *nlp, int nll);
void _routeAdded(struct nlmsghdr *nlp);
void _routeDeleted(struct nlmsghdr *nlp);
void _linkAdded(struct nlmsghdr *nlp);
void _linkDeleted(struct nlmsghdr *nlp);
void _ipAddressAdded(struct nlmsghdr *nlp);
void _ipAddressDeleted(struct nlmsghdr *nlp);
void _requestInterfaceList();
void _requestIPv4Routes();
void _requestIPv6Routes();
int _indexForInterface(const char *iface);
void _setSocketTimeout(int fd, int seconds = 1);
Thread _t;
bool _running;
RouteList _routes_ipv4;
Mutex _rv4_m;
RouteList _routes_ipv6;
Mutex _rv6_m;
uint32_t _seq;
struct iface_entry {
int index;
char ifacename[IFNAMSIZ];
char mac[18];
char mac_bin[6];
unsigned int mtu;
};
Hashtable<int, iface_entry> _interfaces;
Mutex _if_m;
// socket communication vars;
int _fd;
struct sockaddr_nl _la;
};
}
#endif // ZT_LINUX_NETLINK_HPPS
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