mirror of
https://github.com/zerotier/ZeroTierOne.git
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116 lines
2.7 KiB
C++
116 lines
2.7 KiB
C++
#ifndef ZT_MANAGEDROUTE_HPP
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#define ZT_MANAGEDROUTE_HPP
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#include <stdlib.h>
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#include <string.h>
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#include "../node/InetAddress.hpp"
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#include "../node/Utils.hpp"
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#include <stdexcept>
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#include <vector>
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#include <set>
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namespace ZeroTier {
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/**
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* A ZT-managed route that used C++ RAII semantics to automatically clean itself up on deallocate
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*/
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class ManagedRoute
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{
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public:
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ManagedRoute()
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{
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_device[0] = (char)0;
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_systemDevice[0] = (char)0;
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}
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~ManagedRoute()
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{
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this->remove();
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}
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ManagedRoute(const ManagedRoute &r)
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{
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*this = r;
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}
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inline ManagedRoute &operator=(const ManagedRoute &r)
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{
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if (_applied.size() == 0) {
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_target = r._target;
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_via = r._via;
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_systemVia = r._systemVia;
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_applied = r._applied;
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Utils::scopy(_device,sizeof(_device),r._device);
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Utils::scopy(_systemDevice,sizeof(_systemDevice),r._systemDevice);
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} else {
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// Sanity check -- this is an 'assert' to detect a bug
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fprintf(stderr,"Applied ManagedRoute isn't copyable!\n");
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abort();
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}
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return *this;
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}
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/**
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* Initialize object and set route
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*
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* Note: on Windows, use the interface NET_LUID in hexadecimal as the
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* "device name."
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*
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* @param target Route target (e.g. 0.0.0.0/0 for default)
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* @param via Route next L3 hop or NULL InetAddress if local in which case it will be routed via device
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* @param device Name or hex LUID of ZeroTier device (e.g. zt#)
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* @return True if route was successfully set
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*/
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inline bool set(const InetAddress &target,const InetAddress &via,const char *device)
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{
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if ((!via)&&(!device[0]))
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return false;
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this->remove();
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_target = target;
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_via = via;
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if (via.ss_family == AF_INET)
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_via.setPort(32);
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else if (via.ss_family == AF_INET6)
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_via.setPort(128);
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Utils::scopy(_device,sizeof(_device),device);
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return this->sync();
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}
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/**
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* Set or update currently set route
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*
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* This must be called periodically for routes that shadow others so that
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* shadow routes can be updated. In some cases it has no effect
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*
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* @return True if route add/update was successful
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*/
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bool sync();
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/**
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* Remove and clear this ManagedRoute
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*
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* This does nothing if this ManagedRoute is not set or has already been
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* removed. If this is not explicitly called it is called automatically on
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* destruct.
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*/
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void remove();
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inline const InetAddress &target() const { return _target; }
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inline const InetAddress &via() const { return _via; }
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inline const char *device() const { return _device; }
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private:
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InetAddress _target;
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InetAddress _via;
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InetAddress _systemVia; // for route overrides
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std::set<InetAddress> _applied; // routes currently applied
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char _device[128];
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char _systemDevice[128]; // for route overrides
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};
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} // namespace ZeroTier
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#endif
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