mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-19 04:57:53 +00:00
152 lines
3.5 KiB
C++
152 lines
3.5 KiB
C++
/*
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* Copyright (c)2019 ZeroTier, Inc.
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file in the project's root directory.
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*
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* Change Date: 2025-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2.0 of the Apache License.
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*/
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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 "../node/Constants.hpp"
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#ifdef __LINUX__
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#include <vector>
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#include <map>
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#include <set>
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#include <sys/socket.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 <linux/if.h>
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#include "../node/InetAddress.hpp"
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#include "../node/MAC.hpp"
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#include "Thread.hpp"
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#include "../node/Hashtable.hpp"
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#include "../node/Mutex.hpp"
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namespace ZeroTier {
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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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struct Route {
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InetAddress target;
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InetAddress via;
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InetAddress src;
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int ifidx;
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inline bool operator==(const Route &r) const
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{ return ((target == r.target)&&(via == r.via)&&(src == r.src)&&(ifidx == r.ifidx)); }
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inline bool operator!=(const Route &r) const
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{ return (!(*this == r)); }
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inline bool operator<(const Route &r) const
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{
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if (target < r.target) {
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return true;
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} else if (target == r.target) {
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if (via < r.via) {
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return true;
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} else if (via == r.via) {
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if (src < r.src) {
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return true;
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} else if (src == r.src) {
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return (ifidx < r.ifidx);
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}
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}
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}
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return false;
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}
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inline bool operator>(const Route &r) const
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{ return (r < *this); }
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inline bool operator<=(const Route &r) const
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{ return !(r < *this); }
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inline bool operator>=(const Route &r) const
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{ return !(*this < r); }
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};
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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 InetAddress &src, const char *ifaceName);
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void delRoute(const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *ifaceName);
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void addAddress(const InetAddress &addr, const char *iface);
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void removeAddress(const InetAddress &addr, const char *iface);
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bool routeIsSet(const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *ifname);
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void threadMain() throw();
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private:
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int _doRecv(int fd);
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void _processMessage(struct nlmsghdr *nlp, int nll);
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void _routeAdded(struct nlmsghdr *nlp);
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void _routeDeleted(struct nlmsghdr *nlp);
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void _linkAdded(struct nlmsghdr *nlp);
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void _linkDeleted(struct nlmsghdr *nlp);
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void _ipAddressAdded(struct nlmsghdr *nlp);
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void _ipAddressDeleted(struct nlmsghdr *nlp);
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void _requestInterfaceList();
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void _requestIPv4Routes();
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void _requestIPv6Routes();
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int _indexForInterface(const char *iface);
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void _setSocketTimeout(int fd, int seconds = 1);
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Thread _t;
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bool _running;
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uint32_t _seq;
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std::map< InetAddress,std::set<LinuxNetLink::Route> > _routes;
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Mutex _routes_m;
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struct iface_entry {
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iface_entry()
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{ memset(this,0,sizeof(iface_entry)); }
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int index;
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char ifacename[16]; // IFNAMSIZ on Linux == 16
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char mac[18];
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char mac_bin[6];
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unsigned int mtu;
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};
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Hashtable<int, iface_entry> _interfaces;
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Mutex _if_m;
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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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};
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}
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#endif
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#endif // ZT_LINUX_NETLINK_HPPS
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