c24d16e62e
Added LinuxNetLink to talk to the rtnetlink socket for adding interfaces, addresses routes. Not yet complete. Can currently monitor changes on the system.
133 lines
No EOL
3.1 KiB
C++
133 lines
No EOL
3.1 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2018 ZeroTier, Inc. https://www.zerotier.com/
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* You can be released from the requirements of the license by purchasing
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* a commercial license. Buying such a license is mandatory as soon as you
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* develop commercial closed-source software that incorporates or links
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* directly against ZeroTier software without disclosing the source code
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* of your own application.
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*/
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#ifndef ZT_LINUX_NETLINK_HPP
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#define ZT_LINUX_NETLINK_HPP
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#include <vector>
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#include <bits/sockaddr.h>
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#include <asm/types.h>
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#include <linux/rtnetlink.h>
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#include <sys/socket.h>
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#include "../node/InetAddress.hpp"
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#include "Thread.hpp"
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namespace ZeroTier {
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struct route_entry {
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InetAddress target;
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InetAddress via;
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const char *iface;
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};
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typedef std::vector<route_entry> RouteList;
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struct nl_req {
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struct nlmsghdr nl;
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struct rtmsg rt;
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char buf[8192];
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};
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/**
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* Interface with Linux's RTNETLINK
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*/
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class LinuxNetLink
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{
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private:
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LinuxNetLink();
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~LinuxNetLink();
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public:
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static LinuxNetLink& getInstance()
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{
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static LinuxNetLink instance;
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return instance;
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}
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LinuxNetLink(LinuxNetLink const&) = delete;
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void operator=(LinuxNetLink const&) = delete;
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void addRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName);
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void delRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName);
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RouteList getIPV4Routes() const;
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RouteList getIPV6Routes() const;
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void addInterface(const char *iface);
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void addAddress(const InetAddress &addr, const char *iface);
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void threadMain() throw();
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private:
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void _processMessage();
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void _routeAdded();
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void _routeDeleted();
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void _linkAdded();
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void _linkDeleted();
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void _ipAddressAdded();
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void _ipAddressDeleted();
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void _requestIPv4Routes();
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void _requestIPv6Routes();
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Thread _t;
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bool _running;
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RouteList _routes_ipv4;
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RouteList _routes_ipv6;
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// socket communication vars;
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int _fd;
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struct sockaddr_nl _la;
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struct sockaddr_nl _pa;
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struct msghdr _msg;
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struct iovec _iov;
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int _rtn;
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char _buf[8192];
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// RTNETLINK message pointers & lengths
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// used for processing messages
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struct nlmsghdr *_nlp;
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int _nll;
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struct rtmsg *_rtp;
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int _rtl;
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struct rtattr *_rtap;
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struct ifinfomsg *_ifip;
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int _ifil;
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struct ifaddrmsg *_ifap;
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int _ifal;
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};
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}
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#endif // ZT_LINUX_NETLINK_HPPS
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