zerotiertspu/osdep/LinuxNetLink.hpp
Grant Limberg c24d16e62e ManagedRoute uses ioctl to add/remove routes on Linux
Added LinuxNetLink to talk to the rtnetlink socket for adding interfaces, addresses routes.  Not yet complete.  Can currently monitor changes on the system.
2018-05-24 15:22:11 -07:00

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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 <bits/sockaddr.h>
#include <asm/types.h>
#include <linux/rtnetlink.h>
#include <sys/socket.h>
#include "../node/InetAddress.hpp"
#include "Thread.hpp"
namespace ZeroTier {
struct route_entry {
InetAddress target;
InetAddress via;
const char *iface;
};
typedef std::vector<route_entry> RouteList;
struct nl_req {
struct nlmsghdr nl;
struct rtmsg rt;
char buf[8192];
};
/**
* 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 char *ifaceName);
void delRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName);
RouteList getIPV4Routes() const;
RouteList getIPV6Routes() const;
void addInterface(const char *iface);
void addAddress(const InetAddress &addr, const char *iface);
void threadMain() throw();
private:
void _processMessage();
void _routeAdded();
void _routeDeleted();
void _linkAdded();
void _linkDeleted();
void _ipAddressAdded();
void _ipAddressDeleted();
void _requestIPv4Routes();
void _requestIPv6Routes();
Thread _t;
bool _running;
RouteList _routes_ipv4;
RouteList _routes_ipv6;
// socket communication vars;
int _fd;
struct sockaddr_nl _la;
struct sockaddr_nl _pa;
struct msghdr _msg;
struct iovec _iov;
int _rtn;
char _buf[8192];
// RTNETLINK message pointers & lengths
// used for processing messages
struct nlmsghdr *_nlp;
int _nll;
struct rtmsg *_rtp;
int _rtl;
struct rtattr *_rtap;
struct ifinfomsg *_ifip;
int _ifil;
struct ifaddrmsg *_ifap;
int _ifal;
};
}
#endif // ZT_LINUX_NETLINK_HPPS