mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-20 05:28:01 +00:00
439 lines
14 KiB
C++
439 lines
14 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2012-2013 ZeroTier Networks LLC
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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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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <memory>
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#include <string>
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#include <map>
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#include <set>
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#include "Constants.hpp"
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#ifdef __WINDOWS__
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#include <WinSock2.h>
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#include <Windows.h>
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#endif
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#include "NodeConfig.hpp"
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#include "RuntimeEnvironment.hpp"
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#include "Defaults.hpp"
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#include "Utils.hpp"
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#include "Logger.hpp"
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#include "Topology.hpp"
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#include "Demarc.hpp"
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#include "Packet.hpp"
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#include "InetAddress.hpp"
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#include "Peer.hpp"
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#include "Salsa20.hpp"
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#include "Poly1305.hpp"
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#include "SHA512.hpp"
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#include "Node.hpp"
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#include "SoftwareUpdater.hpp"
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namespace ZeroTier {
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NodeConfig::NodeConfig(const RuntimeEnvironment *renv,const char *authToken,unsigned int controlPort) :
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_r(renv),
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_controlSocket(true,controlPort,false,&_CBcontrolPacketHandler,this)
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{
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{
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unsigned int csk[64];
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SHA512::hash(csk,authToken,(unsigned int)strlen(authToken));
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memcpy(_controlSocketKey,csk,32);
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}
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std::string networksFolder(_r->homePath + ZT_PATH_SEPARATOR_S + "networks.d");
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std::map<std::string,bool> networksDotD(Utils::listDirectory(networksFolder.c_str()));
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std::set<uint64_t> nwids;
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for(std::map<std::string,bool>::iterator d(networksDotD.begin());d!=networksDotD.end();++d) {
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if (!d->second) {
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std::string::size_type dot = d->first.rfind(".conf");
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if (dot != std::string::npos) {
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uint64_t nwid = Utils::hexStrToU64(d->first.substr(0,dot).c_str());
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// TODO: remove legacy code once out of beta
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if (nwid == 0x6c92786fee000001ULL) {
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nwid = 0xbc8f9a8ee3000001ULL;
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Utils::rm((networksFolder + ZT_PATH_SEPARATOR_S + d->first).c_str());
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}
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if (nwid == 0xbc8f9a8ee3000001ULL) {
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nwid = 0x8D93FBE886000001ULL;
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Utils::rm((networksFolder + ZT_PATH_SEPARATOR_S + d->first).c_str());
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}
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if (nwid == 0x8D93FBE886000001ULL) {
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nwid = 0x8056c2e21c000001ULL;
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Utils::rm((networksFolder + ZT_PATH_SEPARATOR_S + d->first).c_str());
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}
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if (nwid > 0)
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nwids.insert(nwid);
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}
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}
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}
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for(std::set<uint64_t>::iterator nwid(nwids.begin());nwid!=nwids.end();++nwid) {
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try {
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SharedPtr<Network> nw(Network::newInstance(_r,*nwid));
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_networks[*nwid] = nw;
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} catch (std::exception &exc) {
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LOG("unable to create network %.16llx: %s",(unsigned long long)*nwid,exc.what());
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} catch ( ... ) {
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LOG("unable to create network %.16llx: (unknown exception)",(unsigned long long)*nwid);
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}
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}
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_readLocalConfig();
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}
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NodeConfig::~NodeConfig()
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{
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_writeLocalConfig();
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}
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void NodeConfig::putLocalConfig(const std::string &key,const char *value)
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{
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Mutex::Lock _l(_localConfig_m);
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_localConfig[key] = value;
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_writeLocalConfig();
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}
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void NodeConfig::putLocalConfig(const std::string &key,const std::string &value)
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{
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Mutex::Lock _l(_localConfig_m);
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_localConfig[key] = value;
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_writeLocalConfig();
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}
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std::string NodeConfig::getLocalConfig(const std::string &key) const
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{
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Mutex::Lock _l(_localConfig_m);
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Dictionary::const_iterator i(_localConfig.find(key));
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if (i == _localConfig.end())
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return std::string();
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return i->second;
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}
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void NodeConfig::clean()
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{
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Mutex::Lock _l(_networks_m);
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for(std::map< uint64_t,SharedPtr<Network> >::const_iterator n(_networks.begin());n!=_networks.end();++n)
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n->second->clean();
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}
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/////////////////////////////////////////////////////////////////////////////
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// UDP localhost control bus
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// Macro used in execute() to push lines onto the return packet
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#undef _P
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#define _P(f,...) { r.push_back(std::string()); Utils::stdsprintf(r.back(),(f),##__VA_ARGS__); }
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// Used with Topology::eachPeer to dump peer stats
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class _DumpPeerStatistics
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{
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public:
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_DumpPeerStatistics(std::vector<std::string> &out) :
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r(out),
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_now(Utils::now())
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{
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}
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inline void operator()(Topology &t,const SharedPtr<Peer> &p)
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{
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InetAddress v4(p->ipv4ActivePath(_now));
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InetAddress v6(p->ipv6ActivePath(_now));
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if ((v4)||(v6)) {
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_P("200 listpeers %s %s %s %u %s",
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p->address().toString().c_str(),
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((v4) ? v4.toString().c_str() : "-"),
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((v6) ? v6.toString().c_str() : "-"),
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p->latency(),
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p->remoteVersion().c_str());
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} else {
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_P("200 listpeers %s - - - %s",
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p->address().toString().c_str(),
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p->remoteVersion().c_str());
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}
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}
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private:
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std::vector<std::string> &r;
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uint64_t _now;
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};
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std::vector<std::string> NodeConfig::execute(const char *command)
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{
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std::vector<std::string> r;
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std::vector<std::string> cmd(Utils::split(command,"\r\n \t","\\","'"));
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/* Not coincidentally, response type codes correspond with HTTP
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* status codes. Technically a little arbitrary, but would maybe
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* make things easier if we wanted to slap some kind of web API
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* in front of this thing. */
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if ((cmd.empty())||(cmd[0] == "help")) {
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_P("200 help help");
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_P("200 help info");
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_P("200 help listpeers");
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_P("200 help listnetworks");
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_P("200 help join <network ID>");
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_P("200 help leave <network ID>");
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_P("200 help terminate [<reason>]");
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_P("200 help updatecheck");
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} else if (cmd[0] == "info") {
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bool isOnline = false;
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uint64_t now = Utils::now();
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std::vector< SharedPtr<Peer> > snp(_r->topology->supernodePeers());
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for(std::vector< SharedPtr<Peer> >::const_iterator sn(snp.begin());sn!=snp.end();++sn) {
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if ((*sn)->hasActiveDirectPath(now)) {
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isOnline = true;
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break;
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}
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}
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_P("200 info %s %s %s",_r->identity.address().toString().c_str(),(isOnline ? "ONLINE" : "OFFLINE"),Node::versionString());
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} else if (cmd[0] == "listpeers") {
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_P("200 listpeers <ztaddr> <ipv4> <ipv6> <latency> <version>");
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_r->topology->eachPeer(_DumpPeerStatistics(r));
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} else if (cmd[0] == "listnetworks") {
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Mutex::Lock _l(_networks_m);
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_P("200 listnetworks <nwid> <name> <status> <config age> <type> <dev> <ips>");
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for(std::map< uint64_t,SharedPtr<Network> >::const_iterator nw(_networks.begin());nw!=_networks.end();++nw) {
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std::string tmp;
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std::set<InetAddress> ips(nw->second->ips());
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for(std::set<InetAddress>::iterator i(ips.begin());i!=ips.end();++i) {
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if (tmp.length())
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tmp.push_back(',');
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tmp.append(i->toString());
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}
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SharedPtr<NetworkConfig> nconf(nw->second->config2());
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long long age = (nconf) ? ((long long)Utils::now() - (long long)nconf->timestamp()) : (long long)0;
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if (age < 0)
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age = 0;
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age /= 1000;
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std::string dn(nw->second->tapDeviceName());
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_P("200 listnetworks %.16llx %s %s %lld %s %s %s",
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(unsigned long long)nw->first,
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((nconf) ? nconf->name().c_str() : "?"),
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Network::statusString(nw->second->status()),
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age,
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((nconf) ? (nconf->isOpen() ? "public" : "private") : "?"),
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(dn.length() > 0) ? dn.c_str() : "?",
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((tmp.length() > 0) ? tmp.c_str() : "-"));
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}
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} else if (cmd[0] == "join") {
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if (cmd.size() > 1) {
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uint64_t nwid = Utils::hexStrToU64(cmd[1].c_str());
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if (nwid > 0) {
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Mutex::Lock _l(_networks_m);
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if (_networks.count(nwid)) {
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_P("409 already a member of %.16llx",(unsigned long long)nwid);
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} else {
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try {
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SharedPtr<Network> nw(Network::newInstance(_r,nwid));
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_networks[nwid] = nw;
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_P("200 join %.16llx OK",(unsigned long long)nwid);
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} catch (std::exception &exc) {
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_P("500 join %.16llx ERROR: %s",(unsigned long long)nwid,exc.what());
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} catch ( ... ) {
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_P("500 join %.16llx ERROR: (unknown exception)",(unsigned long long)nwid);
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}
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}
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} else {
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_P("400 join requires a network ID (>0) in hexadecimal format");
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}
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} else {
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_P("400 join requires a network ID (>0) in hexadecimal format");
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}
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} else if (cmd[0] == "leave") {
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if (cmd.size() > 1) {
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Mutex::Lock _l(_networks_m);
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uint64_t nwid = Utils::hexStrToU64(cmd[1].c_str());
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std::map< uint64_t,SharedPtr<Network> >::iterator nw(_networks.find(nwid));
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if (nw == _networks.end()) {
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_P("404 leave %.16llx ERROR: not a member of that network",(unsigned long long)nwid);
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} else {
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nw->second->destroyOnDelete();
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_networks.erase(nw);
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}
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} else {
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_P("400 leave requires a network ID (>0) in hexadecimal format");
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}
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} else if (cmd[0] == "terminate") {
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if (cmd.size() > 1)
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_r->node->terminate(Node::NODE_NORMAL_TERMINATION,cmd[1].c_str());
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else _r->node->terminate(Node::NODE_NORMAL_TERMINATION,(const char *)0);
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} else if (cmd[0] == "updatecheck") {
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if (_r->updater) {
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_P("200 checking for software updates now at: %s",ZT_DEFAULTS.updateLatestNfoURL.c_str());
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_r->updater->checkNow();
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} else {
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_P("500 software updates are not enabled");
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}
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} else {
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_P("404 %s No such command. Use 'help' for help.",cmd[0].c_str());
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}
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r.push_back(std::string()); // terminate with empty line
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return r;
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}
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std::vector< Buffer<ZT_NODECONFIG_MAX_PACKET_SIZE> > NodeConfig::encodeControlMessage(const void *key,unsigned long conversationId,const std::vector<std::string> &payload)
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{
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char poly1305tag[ZT_POLY1305_MAC_LEN];
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char iv[8];
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char keytmp[32];
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std::vector< Buffer<ZT_NODECONFIG_MAX_PACKET_SIZE> > packets;
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Buffer<ZT_NODECONFIG_MAX_PACKET_SIZE> packet;
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packet.setSize(16); // room for poly1305 auth tag and IV
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packet.append((uint32_t)(conversationId & 0xffffffff));
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for(unsigned int i=0;i<payload.size();++i) {
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packet.append(payload[i]); // will throw if too big
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packet.append((unsigned char)0);
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if (((i + 1) >= payload.size())||((packet.size() + payload[i + 1].length() + 1) >= packet.capacity())) {
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Utils::getSecureRandom(iv,8);
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memcpy(packet.field(8,8),iv,8);
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Salsa20 s20(key,256,iv,ZT_PROTO_SALSA20_ROUNDS);
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s20.encrypt(packet.field(16,packet.size() - 16),packet.field(16,packet.size() - 16),packet.size() - 16);
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memcpy(keytmp,key,32);
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for(unsigned int i=0;i<8;++i)
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keytmp[i] ^= iv[i]; // can't reuse poly1305 keys, so mangle key with IV each time
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Poly1305::compute(poly1305tag,packet.field(16,packet.size() - 16),packet.size() - 16,keytmp);
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memcpy(packet.field(0,8),poly1305tag,8);
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packets.push_back(packet);
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packet.setSize(16); // room for poly1305 auth tag and IV
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packet.append((uint32_t)(conversationId & 0xffffffff));
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}
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}
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return packets;
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}
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bool NodeConfig::decodeControlMessagePacket(const void *key,const void *data,unsigned int len,unsigned long &conversationId,std::vector<std::string> &payload)
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{
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char poly1305tag[ZT_POLY1305_MAC_LEN];
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char keytmp[32];
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char iv[8];
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try {
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if (len < 20)
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return false;
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Buffer<ZT_NODECONFIG_MAX_PACKET_SIZE> packet(data,len);
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memcpy(keytmp,key,32);
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memcpy(iv,packet.field(8,8),8);
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for(unsigned int i=0;i<8;++i)
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keytmp[i] ^= iv[i];
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Poly1305::compute(poly1305tag,packet.field(16,packet.size() - 16),packet.size() - 16,keytmp);
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if (!Utils::secureEq(packet.field(0,8),poly1305tag,8))
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return false;
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Salsa20 s20(key,256,packet.field(8,8),ZT_PROTO_SALSA20_ROUNDS);
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s20.decrypt(packet.field(16,packet.size() - 16),packet.field(16,packet.size() - 16),packet.size() - 16);
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conversationId = packet.at<uint32_t>(16);
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const char *pl = ((const char *)packet.data()) + 20;
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unsigned int pll = packet.size() - 20;
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for(unsigned int i=0;i<pll;) {
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unsigned int eos = i;
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while ((eos < pll)&&(pl[eos]))
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++eos;
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if (eos >= i) {
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payload.push_back(std::string(pl + i,eos - i));
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i = eos + 1;
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} else break;
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}
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return true;
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} catch ( ... ) {
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return false;
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}
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}
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void NodeConfig::_CBcontrolPacketHandler(UdpSocket *sock,void *arg,const InetAddress &remoteAddr,const void *data,unsigned int len)
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{
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NodeConfig *nc = (NodeConfig *)arg;
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#ifdef ZT_TRACE
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const RuntimeEnvironment *_r = nc->_r;
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#endif
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try {
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unsigned long convId = 0;
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std::vector<std::string> commands;
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if (!decodeControlMessagePacket(nc->_controlSocketKey,data,len,convId,commands)) {
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TRACE("control bus packet from %s failed decode, discarded",remoteAddr.toString().c_str());
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return;
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}
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TRACE("control bus packet from %s, contains %d commands",remoteAddr.toString().c_str(),(int)commands.size());
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for(std::vector<std::string>::iterator c(commands.begin());c!=commands.end();++c) {
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std::vector< Buffer<ZT_NODECONFIG_MAX_PACKET_SIZE> > resultPackets(encodeControlMessage(nc->_controlSocketKey,convId,nc->execute(c->c_str())));
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for(std::vector< Buffer<ZT_NODECONFIG_MAX_PACKET_SIZE> >::iterator p(resultPackets.begin());p!=resultPackets.end();++p)
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sock->send(remoteAddr,p->data(),p->size(),-1);
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}
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} catch (std::exception &exc) {
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TRACE("exception handling control bus packet from %s: %s",remoteAddr.toString().c_str(),exc.what());
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} catch ( ... ) {
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TRACE("exception handling control bus packet from %s: (unknown)",remoteAddr.toString().c_str());
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}
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}
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/////////////////////////////////////////////////////////////////////////////
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void NodeConfig::_readLocalConfig()
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{
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std::string localDotConf(_r->homePath + ZT_PATH_SEPARATOR_S + "local.conf");
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std::string buf;
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if (Utils::readFile(localDotConf.c_str(),buf)) {
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Mutex::Lock _l(_localConfig_m);
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_localConfig.fromString(buf.c_str());
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}
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}
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void NodeConfig::_writeLocalConfig()
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{
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Utils::writeFile(((_r->homePath + ZT_PATH_SEPARATOR_S + "local.conf")).c_str(),_localConfig.toString());
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}
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} // namespace ZeroTier
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