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336 lines
9.2 KiB
336 lines
9.2 KiB
/* |
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* ZeroTier SDK - 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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/** |
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* @file |
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* |
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* Virtual Ethernet tap device |
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*/ |
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#ifndef ZT_VIRTUALTAP_HPP |
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#define ZT_VIRTUALTAP_HPP |
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extern int errno; |
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#include "Mutex.hpp" |
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#include "MulticastGroup.hpp" |
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#include "InetAddress.hpp" |
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#include "Thread.hpp" |
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#include "Phy.hpp" |
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#include "libztDefs.h" |
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#include <vector> |
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extern std::vector<void*> vtaps; |
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extern ZeroTier::Mutex _vtaps_lock; |
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#if defined(__MINGW32__) || defined(__MINGW64__) |
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#include <WinSock2.h> |
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#include <Windows.h> |
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#include <IPHlpApi.h> |
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#include <Ifdef.h> |
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#endif |
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using namespace ZeroTier; |
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class VirtualSocket; |
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/** |
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* emulates an Ethernet tap device |
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*/ |
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class VirtualTap |
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{ |
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friend class Phy<VirtualTap *>; |
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public: |
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VirtualTap( |
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const char *homePath, |
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const ZeroTier::MAC &mac, |
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unsigned int mtu, |
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unsigned int metric, |
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uint64_t nwid, |
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const char *friendlyName, |
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void (*handler)(void *, void *, uint64_t, const ZeroTier::MAC &, |
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const ZeroTier::MAC &, unsigned int, unsigned int, const void *, unsigned int), |
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void *arg); |
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~VirtualTap(); |
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void setEnabled(bool en); |
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bool enabled() const; |
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/** |
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* Registers a device with the given address |
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*/ |
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bool registerIpWithStack(const ZeroTier::InetAddress &ip); |
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/** |
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* Adds an address to the userspace stack interface associated with this VirtualTap |
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* - Starts VirtualTap main thread ONLY if successful |
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*/ |
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bool addIp(const ZeroTier::InetAddress &ip); |
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/** |
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* Removes an address from the userspace stack interface associated with this VirtualTap |
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*/ |
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bool removeIp(const ZeroTier::InetAddress &ip); |
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/** |
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* Presents data to the userspace stack |
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*/ |
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void put(const ZeroTier::MAC &from,const ZeroTier::MAC &to,unsigned int etherType,const void *data, |
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unsigned int len); |
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/** |
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* Get VirtualTap device name (e.g. 'libzt4-17d72843bc2c5760') |
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*/ |
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std::string deviceName() const; |
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/** |
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* Get Node ID (ZT address) |
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*/ |
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std::string nodeId() const; |
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/** |
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* Set friendly name |
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*/ |
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void setFriendlyName(const char *friendlyName); |
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/** |
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* Scan multicast groups |
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*/ |
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void scanMulticastGroups(std::vector<ZeroTier::MulticastGroup> &added, |
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std::vector<ZeroTier::MulticastGroup> &removed); |
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/** |
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* Set MTU |
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*/ |
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void setMtu(unsigned int mtu); |
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/** |
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* Calls main network stack loops |
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*/ |
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void threadMain() |
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throw(); |
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#if defined(__MINGW32__) |
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/* The following is merely to make ZeroTier's OneService happy while building on Windows. |
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we won't use these in libzt */ |
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NET_LUID _deviceLuid; |
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std::string _deviceInstanceId; |
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/** |
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* Returns whether the VirtualTap interface has been initialized |
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*/ |
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bool isInitialized() const { return _initialized; }; |
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inline const NET_LUID &luid() const { return _deviceLuid; } |
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inline const std::string &instanceId() const { return _deviceInstanceId; } |
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#endif |
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/** |
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* For moving data onto the ZeroTier virtual wire |
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*/ |
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void (*_handler)(void *, void *, uint64_t, const ZeroTier::MAC &, const ZeroTier::MAC &, unsigned int, unsigned int, |
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const void *, unsigned int); |
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/** |
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* Signals us to close the TcpVirtualSocket associated with this PhySocket |
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*/ |
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void phyOnUnixClose(ZeroTier::PhySocket *sock, void **uptr); |
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/** |
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* Notifies us that there is data to be read from an application's socket |
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*/ |
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void phyOnUnixData(ZeroTier::PhySocket *sock, void **uptr, void *data, ssize_t len); |
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/** |
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* Notifies us that we can write to an application's socket |
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*/ |
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void phyOnUnixWritable(ZeroTier::PhySocket *sock, void **uptr, bool stack_invoked); |
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/** |
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* Adds a route to the virtual tap |
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*/ |
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bool routeAdd(const ZeroTier::InetAddress &ip, const ZeroTier::InetAddress &nm, const ZeroTier::InetAddress &gw); |
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/** |
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* Deletes a route from the virtual tap |
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*/ |
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bool routeDelete(const ZeroTier::InetAddress &ip, const ZeroTier::InetAddress &nm); |
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/** |
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* Assign a VirtualSocket to the VirtualTap |
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*/ |
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void addVirtualSocket(VirtualSocket *vs); |
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/** |
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* Remove a VirtualSocket from the VirtualTap |
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*/ |
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void removeVirtualSocket(); |
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/****************************************************************************/ |
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/* DNS */ |
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/****************************************************************************/ |
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/** |
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* Registers a DNS nameserver with the network stack |
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*/ |
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int add_DNS_Nameserver(struct sockaddr *addr); |
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/** |
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* Un-registers a DNS nameserver from the network stack |
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*/ |
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int del_DNS_Nameserver(struct sockaddr *addr); |
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/****************************************************************************/ |
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/* Vars */ |
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/****************************************************************************/ |
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#if defined(STACK_PICO) |
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bool should_start_stack = false; |
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struct pico_device *picodev = NULL; |
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/****************************************************************************/ |
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/* Guarded RX Frame Buffer for picoTCP */ |
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/****************************************************************************/ |
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unsigned char pico_frame_rxbuf[MAX_PICO_FRAME_RX_BUF_SZ]; |
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int pico_frame_rxbuf_tot = 0; |
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Mutex _pico_frame_rxbuf_m; |
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#endif |
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std::vector<std::pair<ZeroTier::InetAddress, ZeroTier::InetAddress> > routes; |
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void *zt1ServiceRef = NULL; |
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char vtap_full_name[64]; |
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char vtap_abbr_name[16]; |
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static int devno; |
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size_t ifindex = 0; |
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std::vector<ZeroTier::InetAddress> ips() const; |
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std::vector<ZeroTier::InetAddress> _ips; |
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std::string _homePath; |
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void *_arg; |
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volatile bool _initialized; |
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volatile bool _enabled; |
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volatile bool _run; |
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ZeroTier::MAC _mac; |
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unsigned int _mtu; |
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uint64_t _nwid; |
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ZeroTier::PhySocket *_unixListenSocket; |
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ZeroTier::Phy<VirtualTap *> _phy; |
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std::vector<VirtualSocket*> _VirtualSockets; |
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Thread _thread; |
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std::string _dev; // path to Unix domain socket |
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std::vector<MulticastGroup> _multicastGroups; |
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Mutex _multicastGroups_m; |
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Mutex _ips_m, _tcpconns_m, _rx_buf_m, _close_m; |
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/* |
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* Timestamp of last run of housekeeping |
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* SEE: ZT_HOUSEKEEPING_INTERVAL in libzt.h |
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*/ |
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uint64_t last_housekeeping_ts = 0; |
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/****************************************************************************/ |
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/* In these, we will call the stack's corresponding functions, this is */ |
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/* where one would put logic to select between different stacks */ |
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/****************************************************************************/ |
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/** |
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* Connect to a remote host via the userspace stack interface associated with this VirtualTap |
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*/ |
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int Connect(VirtualSocket *vs, const struct sockaddr *addr, socklen_t addrlen); |
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/** |
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* Bind to the userspace stack interface associated with this VirtualTap |
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*/ |
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int Bind(VirtualSocket *vs, const struct sockaddr *addr, socklen_t addrlen); |
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/** |
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* Listen for a VirtualSocket |
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*/ |
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int Listen(VirtualSocket *vs, int backlog); |
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/** |
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* Accepts an incoming VirtualSocket |
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*/ |
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VirtualSocket* Accept(VirtualSocket *vs); |
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/** |
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* Move data from RX buffer to application's "socket" |
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*/ |
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int Read(VirtualSocket *vs, PhySocket *sock, void **uptr, bool stack_invoked); |
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/** |
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* Move data from application's "socket" into network stack |
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*/ |
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int Write(VirtualSocket *vs, void *data, ssize_t len); |
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/** |
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* Send data to specified host |
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*/ |
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int SendTo(VirtualSocket *vs, const void *buf, size_t len, int flags, const struct sockaddr *addr, socklen_t addrlen); |
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/** |
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* Closes a VirtualSocket |
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*/ |
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int Close(VirtualSocket *vs); |
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/** |
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* Shuts down some aspect of a VirtualSocket |
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*/ |
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int Shutdown(VirtualSocket *vs, int how); |
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/** |
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* Disposes of previously-closed VirtualSockets |
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*/ |
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void Housekeeping(); |
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/****************************************************************************/ |
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/* Not used in this implementation */ |
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/****************************************************************************/ |
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void phyOnDatagram(PhySocket *sock,void **uptr,const struct sockaddr *local_address, |
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const struct sockaddr *from,void *data,unsigned long len); |
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void phyOnTcpConnect(PhySocket *sock,void **uptr,bool success); |
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void phyOnTcpAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN, |
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const struct sockaddr *from); |
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void phyOnTcpClose(PhySocket *sock,void **uptr); |
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void phyOnTcpData(PhySocket *sock,void **uptr,void *data,unsigned long len); |
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void phyOnTcpWritable(PhySocket *sock,void **uptr); |
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}; |
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#endif // _H
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