mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-23 23:02:23 +00:00
1019 lines
36 KiB
C++
1019 lines
36 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2011-2014 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 <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <map>
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#include <set>
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#include <utility>
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#include <algorithm>
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#include <list>
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#include <vector>
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#include <string>
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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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#include <ShlObj.h>
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#else
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#include <fcntl.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/file.h>
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#endif
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#include "../version.h"
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#include "Node.hpp"
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#include "RuntimeEnvironment.hpp"
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#include "Logger.hpp"
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#include "Utils.hpp"
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#include "Defaults.hpp"
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#include "Identity.hpp"
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#include "Topology.hpp"
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#include "SocketManager.hpp"
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#include "Packet.hpp"
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#include "Switch.hpp"
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#include "EthernetTap.hpp"
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#include "CMWC4096.hpp"
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#include "NodeConfig.hpp"
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#include "Network.hpp"
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#include "MulticastGroup.hpp"
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#include "Mutex.hpp"
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#include "Multicaster.hpp"
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#include "Service.hpp"
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#include "SoftwareUpdater.hpp"
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#include "Buffer.hpp"
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#include "AntiRecursion.hpp"
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#include "RoutingTable.hpp"
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#include "HttpClient.hpp"
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namespace ZeroTier {
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struct _NodeImpl
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{
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RuntimeEnvironment renv;
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unsigned int udpPort,tcpPort;
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std::string reasonForTerminationStr;
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volatile Node::ReasonForTermination reasonForTermination;
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volatile bool started;
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volatile bool running;
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volatile bool resynchronize;
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volatile bool disableRootTopologyUpdates;
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// This function performs final node tear-down
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inline Node::ReasonForTermination terminate()
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{
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RuntimeEnvironment *_r = &renv;
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LOG("terminating: %s",reasonForTerminationStr.c_str());
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renv.shutdownInProgress = true;
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Thread::sleep(500);
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running = false;
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#ifndef __WINDOWS__
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delete renv.netconfService;
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#endif
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delete renv.updater; renv.updater = (SoftwareUpdater *)0;
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delete renv.nc; renv.nc = (NodeConfig *)0; // shut down all networks, close taps, etc.
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delete renv.topology; renv.topology = (Topology *)0; // now we no longer need routing info
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delete renv.sm; renv.sm = (SocketManager *)0; // close all sockets
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delete renv.sw; renv.sw = (Switch *)0; // order matters less from here down
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delete renv.mc; renv.mc = (Multicaster *)0;
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delete renv.antiRec; renv.antiRec = (AntiRecursion *)0;
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delete renv.http; renv.http = (HttpClient *)0;
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delete renv.prng; renv.prng = (CMWC4096 *)0;
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delete renv.log; renv.log = (Logger *)0; // but stop logging last of all
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return reasonForTermination;
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}
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inline Node::ReasonForTermination terminateBecause(Node::ReasonForTermination r,const char *rstr)
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{
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reasonForTerminationStr = rstr;
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reasonForTermination = r;
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return terminate();
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}
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};
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#ifndef __WINDOWS__ // "services" are not supported on Windows
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static void _netconfServiceMessageHandler(void *renv,Service &svc,const Dictionary &msg)
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{
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if (!renv)
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return; // sanity check
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const RuntimeEnvironment *_r = (const RuntimeEnvironment *)renv;
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try {
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//TRACE("from netconf:\n%s",msg.toString().c_str());
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const std::string &type = msg.get("type");
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if (type == "ready") {
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LOG("received 'ready' from netconf.service, sending netconf-init with identity information...");
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Dictionary initMessage;
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initMessage["type"] = "netconf-init";
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initMessage["netconfId"] = _r->identity.toString(true);
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_r->netconfService->send(initMessage);
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} else if (type == "netconf-response") {
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uint64_t inRePacketId = strtoull(msg.get("requestId").c_str(),(char **)0,16);
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uint64_t nwid = strtoull(msg.get("nwid").c_str(),(char **)0,16);
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Address peerAddress(msg.get("peer").c_str());
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if (peerAddress) {
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if (msg.contains("error")) {
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Packet::ErrorCode errCode = Packet::ERROR_INVALID_REQUEST;
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const std::string &err = msg.get("error");
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if (err == "OBJ_NOT_FOUND")
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errCode = Packet::ERROR_OBJ_NOT_FOUND;
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else if (err == "ACCESS_DENIED")
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errCode = Packet::ERROR_NETWORK_ACCESS_DENIED_;
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Packet outp(peerAddress,_r->identity.address(),Packet::VERB_ERROR);
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outp.append((unsigned char)Packet::VERB_NETWORK_CONFIG_REQUEST);
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outp.append(inRePacketId);
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outp.append((unsigned char)errCode);
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outp.append(nwid);
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_r->sw->send(outp,true);
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} else if (msg.contains("netconf")) {
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const std::string &netconf = msg.get("netconf");
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if (netconf.length() < 2048) { // sanity check
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Packet outp(peerAddress,_r->identity.address(),Packet::VERB_OK);
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outp.append((unsigned char)Packet::VERB_NETWORK_CONFIG_REQUEST);
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outp.append(inRePacketId);
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outp.append(nwid);
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outp.append((uint16_t)netconf.length());
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outp.append(netconf.data(),netconf.length());
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outp.compress();
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_r->sw->send(outp,true);
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}
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}
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}
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} else if (type == "netconf-push") {
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if (msg.contains("to")) {
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Dictionary to(msg.get("to")); // key: peer address, value: comma-delimited network list
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for(Dictionary::iterator t(to.begin());t!=to.end();++t) {
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Address ztaddr(t->first);
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if (ztaddr) {
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Packet outp(ztaddr,_r->identity.address(),Packet::VERB_NETWORK_CONFIG_REFRESH);
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char *saveptr = (char *)0;
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// Note: this loop trashes t->second, which is quasi-legal C++ but
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// shouldn't break anything as long as we don't try to use 'to'
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// for anything interesting after doing this.
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for(char *p=Utils::stok(const_cast<char *>(t->second.c_str()),",",&saveptr);(p);p=Utils::stok((char *)0,",",&saveptr)) {
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uint64_t nwid = Utils::hexStrToU64(p);
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if (nwid) {
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if ((outp.size() + sizeof(uint64_t)) >= ZT_UDP_DEFAULT_PAYLOAD_MTU) {
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_r->sw->send(outp,true);
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outp.reset(ztaddr,_r->identity.address(),Packet::VERB_NETWORK_CONFIG_REFRESH);
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}
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outp.append(nwid);
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}
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}
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if (outp.payloadLength())
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_r->sw->send(outp,true);
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}
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}
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}
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}
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} catch (std::exception &exc) {
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LOG("unexpected exception parsing response from netconf service: %s",exc.what());
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} catch ( ... ) {
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LOG("unexpected exception parsing response from netconf service: unknown exception");
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}
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}
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#endif // !__WINDOWS__
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Node::Node(
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const char *hp,
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EthernetTapFactory *tf,
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RoutingTable *rt,
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unsigned int udpPort,
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unsigned int tcpPort,
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bool resetIdentity)
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throw() :
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_impl(new _NodeImpl)
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{
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_NodeImpl *impl = (_NodeImpl *)_impl;
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if ((hp)&&(hp[0]))
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impl->renv.homePath = hp;
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else impl->renv.homePath = ZT_DEFAULTS.defaultHomePath;
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impl->renv.tapFactory = tf;
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impl->renv.routingTable = rt;
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if (resetIdentity) {
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// Forget identity and peer database, peer keys, etc.
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Utils::rm((impl->renv.homePath + ZT_PATH_SEPARATOR_S + "identity.public").c_str());
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Utils::rm((impl->renv.homePath + ZT_PATH_SEPARATOR_S + "identity.secret").c_str());
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Utils::rm((impl->renv.homePath + ZT_PATH_SEPARATOR_S + "peers.persist").c_str());
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// Truncate network config information in networks.d but leave the files since we
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// still want to remember any networks we have joined. This will force those networks
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// to be reconfigured with our newly regenerated identity after startup.
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std::string networksDotD(impl->renv.homePath + ZT_PATH_SEPARATOR_S + "networks.d");
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std::map< std::string,bool > nwfiles(Utils::listDirectory(networksDotD.c_str()));
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for(std::map<std::string,bool>::iterator nwf(nwfiles.begin());nwf!=nwfiles.end();++nwf) {
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FILE *trun = fopen((networksDotD + ZT_PATH_SEPARATOR_S + nwf->first).c_str(),"w");
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if (trun)
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fclose(trun);
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}
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}
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impl->udpPort = udpPort & 0xffff;
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impl->tcpPort = tcpPort & 0xffff;
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impl->reasonForTermination = Node::NODE_RUNNING;
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impl->started = false;
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impl->running = false;
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impl->resynchronize = false;
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impl->disableRootTopologyUpdates = false;
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}
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Node::~Node()
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{
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delete (_NodeImpl *)_impl;
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}
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static void _CBztTraffic(const SharedPtr<Socket> &fromSock,void *arg,const InetAddress &from,Buffer<ZT_SOCKET_MAX_MESSAGE_LEN> &data)
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{
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const RuntimeEnvironment *_r = (const RuntimeEnvironment *)arg;
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if ((_r->sw)&&(!_r->shutdownInProgress))
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_r->sw->onRemotePacket(fromSock,from,data);
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}
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static void _cbHandleGetRootTopology(void *arg,int code,const std::string &url,const std::string &body)
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{
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RuntimeEnvironment *_r = (RuntimeEnvironment *)arg;
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if (_r->shutdownInProgress)
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return;
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if ((code != 200)||(body.length() == 0)) {
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TRACE("failed to retrieve %s",url.c_str());
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return;
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}
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try {
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Dictionary rt(body);
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if (!Topology::authenticateRootTopology(rt)) {
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LOG("discarded invalid root topology update from %s (signature check failed)",url.c_str());
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return;
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}
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{
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std::string rootTopologyPath(_r->homePath + ZT_PATH_SEPARATOR_S + "root-topology");
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std::string rootTopology;
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if (Utils::readFile(rootTopologyPath.c_str(),rootTopology)) {
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Dictionary alreadyHave(rootTopology);
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if (alreadyHave == rt) {
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TRACE("retrieved root topology from %s but no change (same as on disk)",url.c_str());
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return;
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} else if (alreadyHave.signatureTimestamp() > rt.signatureTimestamp()) {
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TRACE("retrieved root topology from %s but no change (ours is newer)",url.c_str());
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return;
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}
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}
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Utils::writeFile(rootTopologyPath.c_str(),body);
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}
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_r->topology->setSupernodes(Dictionary(rt.get("supernodes")));
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} catch ( ... ) {
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LOG("discarded invalid root topology update from %s (format invalid)",url.c_str());
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return;
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}
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}
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Node::ReasonForTermination Node::run()
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throw()
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{
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_NodeImpl *impl = (_NodeImpl *)_impl;
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RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
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impl->started = true;
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impl->running = true;
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try {
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#ifdef ZT_LOG_STDOUT
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_r->log = new Logger((const char *)0,(const char *)0,0);
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#else
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_r->log = new Logger((_r->homePath + ZT_PATH_SEPARATOR_S + "node.log").c_str(),(const char *)0,131072);
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#endif
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LOG("starting version %s",versionString());
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// Create non-crypto PRNG right away in case other code in init wants to use it
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_r->prng = new CMWC4096();
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// Read identity public and secret, generating if not present
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{
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bool gotId = false;
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std::string identitySecretPath(_r->homePath + ZT_PATH_SEPARATOR_S + "identity.secret");
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std::string identityPublicPath(_r->homePath + ZT_PATH_SEPARATOR_S + "identity.public");
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std::string idser;
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if (Utils::readFile(identitySecretPath.c_str(),idser))
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gotId = _r->identity.fromString(idser);
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if ((gotId)&&(!_r->identity.locallyValidate()))
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gotId = false;
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if (gotId) {
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// Make sure identity.public matches identity.secret
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idser = std::string();
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Utils::readFile(identityPublicPath.c_str(),idser);
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std::string pubid(_r->identity.toString(false));
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if (idser != pubid) {
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if (!Utils::writeFile(identityPublicPath.c_str(),pubid))
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return impl->terminateBecause(Node::NODE_UNRECOVERABLE_ERROR,"could not write identity.public (home path not writable?)");
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}
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} else {
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LOG("no identity found or identity invalid, generating one... this might take a few seconds...");
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_r->identity.generate();
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LOG("generated new identity: %s",_r->identity.address().toString().c_str());
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idser = _r->identity.toString(true);
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if (!Utils::writeFile(identitySecretPath.c_str(),idser))
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return impl->terminateBecause(Node::NODE_UNRECOVERABLE_ERROR,"could not write identity.secret (home path not writable?)");
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idser = _r->identity.toString(false);
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if (!Utils::writeFile(identityPublicPath.c_str(),idser))
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return impl->terminateBecause(Node::NODE_UNRECOVERABLE_ERROR,"could not write identity.public (home path not writable?)");
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}
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Utils::lockDownFile(identitySecretPath.c_str(),false);
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}
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// Make sure networks.d exists
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{
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std::string networksDotD(_r->homePath + ZT_PATH_SEPARATOR_S + "networks.d");
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#ifdef __WINDOWS__
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CreateDirectoryA(networksDotD.c_str(),NULL);
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#else
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mkdir(networksDotD.c_str(),0700);
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#endif
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}
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_r->http = new HttpClient();
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_r->antiRec = new AntiRecursion();
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_r->mc = new Multicaster();
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_r->sw = new Switch(_r);
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_r->sm = new SocketManager(impl->udpPort,impl->tcpPort,&_CBztTraffic,_r);
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_r->topology = new Topology(_r,Utils::fileExists((_r->homePath + ZT_PATH_SEPARATOR_S + "iddb.d").c_str()));
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try {
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_r->nc = new NodeConfig(_r);
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} catch (std::exception &exc) {
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return impl->terminateBecause(Node::NODE_UNRECOVERABLE_ERROR,"unable to initialize IPC socket: is ZeroTier One already running?");
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}
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_r->node = this;
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#ifdef ZT_AUTO_UPDATE
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if (ZT_DEFAULTS.updateLatestNfoURL.length()) {
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_r->updater = new SoftwareUpdater(_r);
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_r->updater->cleanOldUpdates(); // clean out updates.d on startup
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} else {
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LOG("WARNING: unable to enable software updates: latest .nfo URL from ZT_DEFAULTS is empty (does this platform actually support software updates?)");
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}
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#endif
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// Initialize root topology from defaults or root-toplogy file in home path on disk
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{
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std::string rootTopologyPath(_r->homePath + ZT_PATH_SEPARATOR_S + "root-topology");
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std::string rootTopology;
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if (!Utils::readFile(rootTopologyPath.c_str(),rootTopology))
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rootTopology = ZT_DEFAULTS.defaultRootTopology;
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try {
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Dictionary rt(rootTopology);
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if (Topology::authenticateRootTopology(rt)) {
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// Set supernodes if root topology signature is valid
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_r->topology->setSupernodes(Dictionary(rt.get("supernodes",""))); // set supernodes from root-topology
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// If root-topology contains noupdate=1, disable further updates and only use what was on disk
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impl->disableRootTopologyUpdates = (Utils::strToInt(rt.get("noupdate","0").c_str()) > 0);
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} else {
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// Revert to built-in defaults if root topology fails signature check
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LOG("%s failed signature check, using built-in defaults instead",rootTopologyPath.c_str());
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Utils::rm(rootTopologyPath.c_str());
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_r->topology->setSupernodes(Dictionary(Dictionary(ZT_DEFAULTS.defaultRootTopology).get("supernodes","")));
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impl->disableRootTopologyUpdates = false;
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}
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} catch ( ... ) {
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return impl->terminateBecause(Node::NODE_UNRECOVERABLE_ERROR,"invalid root-topology format");
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}
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}
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} catch (std::bad_alloc &exc) {
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return impl->terminateBecause(Node::NODE_UNRECOVERABLE_ERROR,"memory allocation failure");
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} catch (std::runtime_error &exc) {
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return impl->terminateBecause(Node::NODE_UNRECOVERABLE_ERROR,exc.what());
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} catch ( ... ) {
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return impl->terminateBecause(Node::NODE_UNRECOVERABLE_ERROR,"unknown exception during initialization");
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}
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// Start external service subprocesses, which is only used by special nodes
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// right now and isn't available on Windows.
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#ifndef __WINDOWS__
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try {
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std::string netconfServicePath(_r->homePath + ZT_PATH_SEPARATOR_S + "services.d" + ZT_PATH_SEPARATOR_S + "netconf.service");
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if (Utils::fileExists(netconfServicePath.c_str())) {
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LOG("netconf.d/netconf.service appears to exist, starting...");
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_r->netconfService = new Service(_r,"netconf",netconfServicePath.c_str(),&_netconfServiceMessageHandler,_r);
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Dictionary initMessage;
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initMessage["type"] = "netconf-init";
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initMessage["netconfId"] = _r->identity.toString(true);
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_r->netconfService->send(initMessage);
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}
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} catch ( ... ) {
|
|
LOG("unexpected exception attempting to start services");
|
|
}
|
|
#endif
|
|
|
|
// Core I/O loop
|
|
try {
|
|
/* Shut down if this file exists but fails to open. This is used on Mac to
|
|
* shut down automatically on .app deletion by symlinking this to the
|
|
* Info.plist file inside the ZeroTier One application. This causes the
|
|
* service to die when the user throws away the app, allowing uninstallation
|
|
* in the natural Mac way. */
|
|
std::string shutdownIfUnreadablePath(_r->homePath + ZT_PATH_SEPARATOR_S + "shutdownIfUnreadable");
|
|
|
|
uint64_t lastNetworkAutoconfCheck = Utils::now() - 5000ULL; // check autoconf again after 5s for startup
|
|
uint64_t lastPingCheck = 0;
|
|
uint64_t lastClean = Utils::now(); // don't need to do this immediately
|
|
uint64_t lastNetworkFingerprintCheck = 0;
|
|
uint64_t lastMulticastCheck = 0;
|
|
uint64_t lastSupernodePingCheck = 0;
|
|
uint64_t lastBeacon = 0;
|
|
uint64_t lastRootTopologyFetch = 0;
|
|
long lastDelayDelta = 0;
|
|
|
|
uint64_t networkConfigurationFingerprint = 0;
|
|
_r->timeOfLastResynchronize = Utils::now();
|
|
|
|
// We are up and running
|
|
_r->initialized = true;
|
|
|
|
while (impl->reasonForTermination == NODE_RUNNING) {
|
|
/* This is how the service automatically shuts down when the OSX .app is
|
|
* thrown in the trash. It's not used on any other platform for now but
|
|
* could do similar things. It's disabled on Windows since it doesn't really
|
|
* work there. */
|
|
#ifdef __UNIX_LIKE__
|
|
if (Utils::fileExists(shutdownIfUnreadablePath.c_str(),false)) {
|
|
FILE *tmpf = fopen(shutdownIfUnreadablePath.c_str(),"r");
|
|
if (!tmpf)
|
|
return impl->terminateBecause(Node::NODE_NORMAL_TERMINATION,"shutdownIfUnreadable exists but is not readable");
|
|
fclose(tmpf);
|
|
}
|
|
#endif
|
|
|
|
uint64_t now = Utils::now();
|
|
bool resynchronize = false;
|
|
|
|
// If it looks like the computer slept and woke, resynchronize.
|
|
if (lastDelayDelta >= ZT_SLEEP_WAKE_DETECTION_THRESHOLD) {
|
|
resynchronize = true;
|
|
LOG("probable suspend/resume detected, pausing a moment for things to settle...");
|
|
Thread::sleep(ZT_SLEEP_WAKE_SETTLE_TIME);
|
|
}
|
|
|
|
// If our network environment looks like it changed, resynchronize.
|
|
if ((resynchronize)||((now - lastNetworkFingerprintCheck) >= ZT_NETWORK_FINGERPRINT_CHECK_DELAY)) {
|
|
lastNetworkFingerprintCheck = now;
|
|
uint64_t fp = _r->routingTable->networkEnvironmentFingerprint(_r->nc->networkTapDeviceNames());
|
|
if (fp != networkConfigurationFingerprint) {
|
|
LOG("netconf fingerprint change: %.16llx != %.16llx, resyncing with network",networkConfigurationFingerprint,fp);
|
|
networkConfigurationFingerprint = fp;
|
|
resynchronize = true;
|
|
}
|
|
}
|
|
|
|
// Supernodes do not resynchronize unless explicitly ordered via SIGHUP.
|
|
if ((resynchronize)&&(_r->topology->amSupernode()))
|
|
resynchronize = false;
|
|
|
|
// Check for SIGHUP / force resync.
|
|
if (impl->resynchronize) {
|
|
impl->resynchronize = false;
|
|
resynchronize = true;
|
|
LOG("resynchronize forced by user, syncing with network");
|
|
}
|
|
|
|
if (resynchronize) {
|
|
_r->tcpTunnelingEnabled = false; // turn off TCP tunneling master switch at first, will be reenabled on persistent UDP failure
|
|
_r->timeOfLastResynchronize = now;
|
|
}
|
|
|
|
/* Supernodes are pinged separately and more aggressively. The
|
|
* ZT_STARTUP_AGGRO parameter sets a limit on how rapidly they are
|
|
* tried, while PingSupernodesThatNeedPing contains the logic for
|
|
* determining if they need PING. */
|
|
if ((now - lastSupernodePingCheck) >= ZT_STARTUP_AGGRO) {
|
|
lastSupernodePingCheck = now;
|
|
|
|
uint64_t lastReceiveFromAnySupernode = 0; // function object result paramter
|
|
_r->topology->eachSupernodePeer(Topology::FindMostRecentDirectReceiveTimestamp(lastReceiveFromAnySupernode));
|
|
|
|
// Turn on TCP tunneling master switch if we haven't heard anything since before
|
|
// the last resynchronize and we've been trying long enough.
|
|
uint64_t tlr = _r->timeOfLastResynchronize;
|
|
if ((lastReceiveFromAnySupernode < tlr)&&((now - tlr) >= ZT_TCP_TUNNEL_FAILOVER_TIMEOUT)) {
|
|
TRACE("network still unreachable after %u ms, TCP TUNNELING ENABLED",(unsigned int)ZT_TCP_TUNNEL_FAILOVER_TIMEOUT);
|
|
_r->tcpTunnelingEnabled = true;
|
|
}
|
|
|
|
_r->topology->eachSupernodePeer(Topology::PingSupernodesThatNeedPing(_r,now));
|
|
}
|
|
|
|
if (resynchronize) {
|
|
/* Send NOP to all peers on resynchronize, directly to supernodes and
|
|
* indirectly to regular nodes (to trigger RENDEZVOUS). Also clear
|
|
* learned paths since they're likely no longer valid, and close
|
|
* TCP sockets since they're also likely invalid. */
|
|
_r->sm->closeTcpSockets();
|
|
_r->topology->eachPeer(Topology::ResetActivePeers(_r,now));
|
|
} else {
|
|
/* Periodically check for changes in our local multicast subscriptions
|
|
* and broadcast those changes to directly connected peers. */
|
|
if ((now - lastMulticastCheck) >= ZT_MULTICAST_LOCAL_POLL_PERIOD) {
|
|
lastMulticastCheck = now;
|
|
try {
|
|
std::map< SharedPtr<Network>,std::set<MulticastGroup> > toAnnounce;
|
|
std::vector< SharedPtr<Network> > networks(_r->nc->networks());
|
|
for(std::vector< SharedPtr<Network> >::const_iterator nw(networks.begin());nw!=networks.end();++nw) {
|
|
if ((*nw)->updateMulticastGroups())
|
|
toAnnounce.insert(std::pair< SharedPtr<Network>,std::set<MulticastGroup> >(*nw,(*nw)->multicastGroups()));
|
|
}
|
|
if (toAnnounce.size())
|
|
_r->sw->announceMulticastGroups(toAnnounce);
|
|
} catch (std::exception &exc) {
|
|
LOG("unexpected exception announcing multicast groups: %s",exc.what());
|
|
} catch ( ... ) {
|
|
LOG("unexpected exception announcing multicast groups: (unknown)");
|
|
}
|
|
}
|
|
|
|
/* Periodically ping all our non-stale direct peers unless we're a supernode.
|
|
* Supernodes only ping each other (which is done above). */
|
|
if ((!_r->topology->amSupernode())&&((now - lastPingCheck) >= ZT_PING_CHECK_DELAY)) {
|
|
lastPingCheck = now;
|
|
try {
|
|
_r->topology->eachPeer(Topology::PingPeersThatNeedPing(_r,now));
|
|
} catch (std::exception &exc) {
|
|
LOG("unexpected exception running ping check cycle: %s",exc.what());
|
|
} catch ( ... ) {
|
|
LOG("unexpected exception running ping check cycle: (unkonwn)");
|
|
}
|
|
}
|
|
}
|
|
|
|
// Update network configurations when needed.
|
|
if ((resynchronize)||((now - lastNetworkAutoconfCheck) >= ZT_NETWORK_AUTOCONF_CHECK_DELAY)) {
|
|
lastNetworkAutoconfCheck = now;
|
|
std::vector< SharedPtr<Network> > nets(_r->nc->networks());
|
|
for(std::vector< SharedPtr<Network> >::iterator n(nets.begin());n!=nets.end();++n) {
|
|
if ((now - (*n)->lastConfigUpdate()) >= ZT_NETWORK_AUTOCONF_DELAY)
|
|
(*n)->requestConfiguration();
|
|
}
|
|
}
|
|
|
|
// Do periodic tasks in submodules.
|
|
if ((now - lastClean) >= ZT_DB_CLEAN_PERIOD) {
|
|
lastClean = now;
|
|
_r->mc->clean();
|
|
_r->topology->clean();
|
|
_r->nc->clean();
|
|
if (_r->updater)
|
|
_r->updater->checkIfMaxIntervalExceeded(now);
|
|
}
|
|
|
|
// Send beacons to physical local LANs
|
|
if ((resynchronize)||((now - lastBeacon) >= ZT_BEACON_INTERVAL)) {
|
|
lastBeacon = now;
|
|
char bcn[ZT_PROTO_BEACON_LENGTH];
|
|
void *bcnptr = bcn;
|
|
*((uint32_t *)(bcnptr)) = _r->prng->next32();
|
|
bcnptr = bcn + 4;
|
|
*((uint32_t *)(bcnptr)) = _r->prng->next32();
|
|
_r->identity.address().copyTo(bcn + ZT_PROTO_BEACON_IDX_ADDRESS,ZT_ADDRESS_LENGTH);
|
|
TRACE("sending LAN beacon to %s",ZT_DEFAULTS.v4Broadcast.toString().c_str());
|
|
_r->antiRec->logOutgoingZT(bcn,ZT_PROTO_BEACON_LENGTH);
|
|
_r->sm->send(ZT_DEFAULTS.v4Broadcast,false,false,bcn,ZT_PROTO_BEACON_LENGTH);
|
|
}
|
|
|
|
// Check for updates to root topology (supernodes) periodically
|
|
if ((now - lastRootTopologyFetch) >= ZT_UPDATE_ROOT_TOPOLOGY_CHECK_INTERVAL) {
|
|
lastRootTopologyFetch = now;
|
|
if (!impl->disableRootTopologyUpdates) {
|
|
TRACE("fetching root topology from %s",ZT_DEFAULTS.rootTopologyUpdateURL.c_str());
|
|
_r->http->GET(ZT_DEFAULTS.rootTopologyUpdateURL,HttpClient::NO_HEADERS,60,&_cbHandleGetRootTopology,_r);
|
|
}
|
|
}
|
|
|
|
// Sleep for loop interval or until something interesting happens.
|
|
try {
|
|
unsigned long delay = std::min((unsigned long)ZT_MAX_SERVICE_LOOP_INTERVAL,_r->sw->doTimerTasks());
|
|
uint64_t start = Utils::now();
|
|
_r->sm->poll(delay);
|
|
lastDelayDelta = (long)(Utils::now() - start) - (long)delay; // used to detect sleep/wake
|
|
} catch (std::exception &exc) {
|
|
LOG("unexpected exception running Switch doTimerTasks: %s",exc.what());
|
|
} catch ( ... ) {
|
|
LOG("unexpected exception running Switch doTimerTasks: (unknown)");
|
|
}
|
|
}
|
|
} catch ( ... ) {
|
|
LOG("FATAL: unexpected exception in core loop: unknown exception");
|
|
return impl->terminateBecause(Node::NODE_UNRECOVERABLE_ERROR,"unexpected exception during outer main I/O loop");
|
|
}
|
|
|
|
return impl->terminate();
|
|
}
|
|
|
|
const char *Node::terminationMessage() const
|
|
throw()
|
|
{
|
|
if ((!((_NodeImpl *)_impl)->started)||(((_NodeImpl *)_impl)->running))
|
|
return (const char *)0;
|
|
return ((_NodeImpl *)_impl)->reasonForTerminationStr.c_str();
|
|
}
|
|
|
|
void Node::terminate(ReasonForTermination reason,const char *reasonText)
|
|
throw()
|
|
{
|
|
((_NodeImpl *)_impl)->reasonForTermination = reason;
|
|
((_NodeImpl *)_impl)->reasonForTerminationStr = ((reasonText) ? reasonText : "");
|
|
((_NodeImpl *)_impl)->renv.sm->whack();
|
|
}
|
|
|
|
void Node::resync()
|
|
throw()
|
|
{
|
|
((_NodeImpl *)_impl)->resynchronize = true;
|
|
((_NodeImpl *)_impl)->renv.sm->whack();
|
|
}
|
|
|
|
bool Node::online()
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
if (!impl->running)
|
|
return false;
|
|
RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
|
|
uint64_t now = Utils::now();
|
|
uint64_t since = _r->timeOfLastResynchronize;
|
|
std::vector< SharedPtr<Peer> > snp(_r->topology->supernodePeers());
|
|
for(std::vector< SharedPtr<Peer> >::const_iterator sn(snp.begin());sn!=snp.end();++sn) {
|
|
uint64_t lastRec = (*sn)->lastDirectReceive();
|
|
if ((lastRec)&&(lastRec > since)&&((now - lastRec) < ZT_PEER_PATH_ACTIVITY_TIMEOUT))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool Node::started()
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
return impl->started;
|
|
}
|
|
|
|
bool Node::running()
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
return impl->running;
|
|
}
|
|
|
|
bool Node::initialized()
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
|
|
return ((_r)&&(_r->initialized));
|
|
}
|
|
|
|
uint64_t Node::address()
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
|
|
if ((!_r)||(!_r->initialized))
|
|
return 0;
|
|
return _r->identity.address().toInt();
|
|
}
|
|
|
|
void Node::join(uint64_t nwid)
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
|
|
_r->nc->join(nwid);
|
|
}
|
|
|
|
void Node::leave(uint64_t nwid)
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
|
|
_r->nc->leave(nwid);
|
|
}
|
|
|
|
struct GatherPeerStatistics
|
|
{
|
|
uint64_t now;
|
|
ZT1_Node_Status *status;
|
|
inline void operator()(Topology &t,const SharedPtr<Peer> &p)
|
|
{
|
|
++status->knownPeers;
|
|
if (p->hasActiveDirectPath(now))
|
|
++status->directlyConnectedPeers;
|
|
if (p->alive(now))
|
|
++status->alivePeers;
|
|
}
|
|
};
|
|
void Node::status(ZT1_Node_Status *status)
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
|
|
|
|
memset(status,0,sizeof(ZT1_Node_Status));
|
|
|
|
Utils::scopy(status->publicIdentity,sizeof(status->publicIdentity),_r->identity.toString(false).c_str());
|
|
_r->identity.address().toString(status->address,sizeof(status->address));
|
|
status->rawAddress = _r->identity.address().toInt();
|
|
|
|
status->knownPeers = 0;
|
|
status->supernodes = _r->topology->numSupernodes();
|
|
status->directlyConnectedPeers = 0;
|
|
status->alivePeers = 0;
|
|
GatherPeerStatistics gps;
|
|
gps.now = Utils::now();
|
|
gps.status = status;
|
|
_r->topology->eachPeer(gps);
|
|
|
|
if (status->alivePeers > 0) {
|
|
double dlsr = (double)status->directlyConnectedPeers / (double)status->alivePeers;
|
|
if (dlsr > 1.0) dlsr = 1.0;
|
|
if (dlsr < 0.0) dlsr = 0.0;
|
|
status->directLinkSuccessRate = (float)dlsr;
|
|
} else status->directLinkSuccessRate = 1.0f; // no connections to no active peers == 100% success at nothing
|
|
|
|
status->online = online();
|
|
status->running = impl->running;
|
|
}
|
|
|
|
struct CollectPeersAndPaths
|
|
{
|
|
std::vector< std::pair< SharedPtr<Peer>,std::vector<Path> > > data;
|
|
inline void operator()(Topology &t,const SharedPtr<Peer> &p) { data.push_back(std::pair< SharedPtr<Peer>,std::vector<Path> >(p,p->paths())); }
|
|
};
|
|
struct SortPeersAndPathsInAscendingAddressOrder
|
|
{
|
|
inline bool operator()(const std::pair< SharedPtr<Peer>,std::vector<Path> > &a,const std::pair< SharedPtr<Peer>,std::vector<Path> > &b) const { return (a.first->address() < b.first->address()); }
|
|
};
|
|
ZT1_Node_PeerList *Node::listPeers()
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
|
|
|
|
CollectPeersAndPaths pp;
|
|
_r->topology->eachPeer(pp);
|
|
std::sort(pp.data.begin(),pp.data.end(),SortPeersAndPathsInAscendingAddressOrder());
|
|
|
|
unsigned int returnBufSize = sizeof(ZT1_Node_PeerList);
|
|
for(std::vector< std::pair< SharedPtr<Peer>,std::vector<Path> > >::iterator p(pp.data.begin());p!=pp.data.end();++p)
|
|
returnBufSize += sizeof(ZT1_Node_Peer) + (sizeof(ZT1_Node_PhysicalPath) * p->second.size());
|
|
|
|
char *buf = (char *)::malloc(returnBufSize);
|
|
if (!buf)
|
|
return (ZT1_Node_PeerList *)0;
|
|
memset(buf,0,returnBufSize);
|
|
|
|
ZT1_Node_PeerList *pl = (ZT1_Node_PeerList *)buf;
|
|
buf += sizeof(ZT1_Node_PeerList);
|
|
|
|
pl->peers = (ZT1_Node_Peer *)buf;
|
|
buf += (sizeof(ZT1_Node_Peer) * pp.data.size());
|
|
pl->numPeers = 0;
|
|
|
|
uint64_t now = Utils::now();
|
|
for(std::vector< std::pair< SharedPtr<Peer>,std::vector<Path> > >::iterator p(pp.data.begin());p!=pp.data.end();++p) {
|
|
ZT1_Node_Peer *prec = &(pl->peers[pl->numPeers++]);
|
|
if (p->first->remoteVersionKnown())
|
|
Utils::snprintf(prec->remoteVersion,sizeof(prec->remoteVersion),"%u.%u.%u",p->first->remoteVersionMajor(),p->first->remoteVersionMinor(),p->first->remoteVersionRevision());
|
|
p->first->address().toString(prec->address,sizeof(prec->address));
|
|
prec->rawAddress = p->first->address().toInt();
|
|
prec->latency = p->first->latency();
|
|
|
|
prec->paths = (ZT1_Node_PhysicalPath *)buf;
|
|
buf += sizeof(ZT1_Node_PhysicalPath) * p->second.size();
|
|
|
|
prec->numPaths = 0;
|
|
for(std::vector<Path>::iterator pi(p->second.begin());pi!=p->second.end();++pi) {
|
|
ZT1_Node_PhysicalPath *path = &(prec->paths[prec->numPaths++]);
|
|
path->type = static_cast<typeof(path->type)>(pi->type());
|
|
if (pi->address().isV6()) {
|
|
path->address.type = ZT1_Node_PhysicalAddress::ZT1_Node_PhysicalAddress_TYPE_IPV6;
|
|
memcpy(path->address.bits,pi->address().rawIpData(),16);
|
|
// TODO: zoneIndex not supported yet, but should be once echo-location works w/V6
|
|
} else {
|
|
path->address.type = ZT1_Node_PhysicalAddress::ZT1_Node_PhysicalAddress_TYPE_IPV4;
|
|
memcpy(path->address.bits,pi->address().rawIpData(),4);
|
|
}
|
|
path->address.port = pi->address().port();
|
|
Utils::scopy(path->address.ascii,sizeof(path->address.ascii),pi->address().toIpString().c_str());
|
|
path->lastSend = (pi->lastSend() > 0) ? ((long)(now - pi->lastSend())) : (long)-1;
|
|
path->lastReceive = (pi->lastReceived() > 0) ? ((long)(now - pi->lastReceived())) : (long)-1;
|
|
path->lastPing = (pi->lastPing() > 0) ? ((long)(now - pi->lastPing())) : (long)-1;
|
|
path->active = pi->active(now);
|
|
path->fixed = pi->fixed();
|
|
}
|
|
}
|
|
|
|
return pl;
|
|
}
|
|
|
|
// Fills out everything but ips[] and numIps, which must be done more manually
|
|
static void _fillNetworkQueryResultBuffer(const SharedPtr<Network> &network,const SharedPtr<NetworkConfig> &nconf,ZT1_Node_Network *nbuf)
|
|
{
|
|
nbuf->nwid = network->id();
|
|
Utils::snprintf(nbuf->nwidHex,sizeof(nbuf->nwidHex),"%.16llx",(unsigned long long)network->id());
|
|
if (nconf) {
|
|
Utils::scopy(nbuf->name,sizeof(nbuf->name),nconf->name().c_str());
|
|
Utils::scopy(nbuf->description,sizeof(nbuf->description),nconf->description().c_str());
|
|
}
|
|
Utils::scopy(nbuf->device,sizeof(nbuf->device),network->tapDeviceName().c_str());
|
|
Utils::scopy(nbuf->statusStr,sizeof(nbuf->statusStr),Network::statusString(network->status()));
|
|
network->mac().toString(nbuf->macStr,sizeof(nbuf->macStr));
|
|
network->mac().copyTo(nbuf->mac,sizeof(nbuf->mac));
|
|
uint64_t lcu = network->lastConfigUpdate();
|
|
if (lcu > 0)
|
|
nbuf->configAge = (long)(Utils::now() - lcu);
|
|
else nbuf->configAge = -1;
|
|
nbuf->status = static_cast<typeof(nbuf->status)>(network->status());
|
|
nbuf->enabled = network->enabled();
|
|
nbuf->isPrivate = (nconf) ? nconf->isPrivate() : true;
|
|
}
|
|
|
|
ZT1_Node_Network *Node::getNetworkStatus(uint64_t nwid)
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
|
|
|
|
SharedPtr<Network> network(_r->nc->network(nwid));
|
|
if (!network)
|
|
return (ZT1_Node_Network *)0;
|
|
SharedPtr<NetworkConfig> nconf(network->config2());
|
|
std::set<InetAddress> ips(network->ips());
|
|
|
|
char *buf = (char *)::malloc(sizeof(ZT1_Node_Network) + (sizeof(ZT1_Node_PhysicalAddress) * ips.size()));
|
|
if (!buf)
|
|
return (ZT1_Node_Network *)0;
|
|
memset(buf,0,sizeof(ZT1_Node_Network) + (sizeof(ZT1_Node_PhysicalAddress) * ips.size()));
|
|
|
|
ZT1_Node_Network *nbuf = (ZT1_Node_Network *)buf;
|
|
buf += sizeof(ZT1_Node_Network);
|
|
|
|
_fillNetworkQueryResultBuffer(network,nconf,nbuf);
|
|
|
|
nbuf->ips = (ZT1_Node_PhysicalAddress *)buf;
|
|
nbuf->numIps = 0;
|
|
for(std::set<InetAddress>::iterator ip(ips.begin());ip!=ips.end();++ip) {
|
|
ZT1_Node_PhysicalAddress *ipb = &(nbuf->ips[nbuf->numIps++]);
|
|
if (ip->isV6()) {
|
|
ipb->type = ZT1_Node_PhysicalAddress::ZT1_Node_PhysicalAddress_TYPE_IPV6;
|
|
memcpy(ipb->bits,ip->rawIpData(),16);
|
|
} else {
|
|
ipb->type = ZT1_Node_PhysicalAddress::ZT1_Node_PhysicalAddress_TYPE_IPV4;
|
|
memcpy(ipb->bits,ip->rawIpData(),4);
|
|
}
|
|
ipb->port = ip->port();
|
|
Utils::scopy(ipb->ascii,sizeof(ipb->ascii),ip->toIpString().c_str());
|
|
}
|
|
|
|
return nbuf;
|
|
}
|
|
|
|
ZT1_Node_NetworkList *Node::listNetworks()
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
|
|
|
|
std::vector< SharedPtr<Network> > networks(_r->nc->networks());
|
|
std::vector< SharedPtr<NetworkConfig> > nconfs(networks.size());
|
|
std::vector< std::set<InetAddress> > ipsv(networks.size());
|
|
|
|
unsigned long returnBufSize = sizeof(ZT1_Node_NetworkList);
|
|
for(unsigned long i=0;i<networks.size();++i) {
|
|
nconfs[i] = networks[i]->config2();
|
|
ipsv[i] = networks[i]->ips();
|
|
returnBufSize += sizeof(ZT1_Node_Network) + (sizeof(ZT1_Node_PhysicalAddress) * ipsv[i].size());
|
|
}
|
|
|
|
char *buf = (char *)::malloc(returnBufSize);
|
|
if (!buf)
|
|
return (ZT1_Node_NetworkList *)0;
|
|
memset(buf,0,returnBufSize);
|
|
|
|
ZT1_Node_NetworkList *nl = (ZT1_Node_NetworkList *)buf;
|
|
buf += sizeof(ZT1_Node_NetworkList);
|
|
|
|
nl->networks = (ZT1_Node_Network *)buf;
|
|
buf += sizeof(ZT1_Node_Network) * networks.size();
|
|
|
|
for(unsigned long i=0;i<networks.size();++i) {
|
|
ZT1_Node_Network *nbuf = &(nl->networks[nl->numNetworks++]);
|
|
|
|
_fillNetworkQueryResultBuffer(networks[i],nconfs[i],nbuf);
|
|
|
|
nbuf->ips = (ZT1_Node_PhysicalAddress *)buf;
|
|
buf += sizeof(ZT1_Node_PhysicalAddress);
|
|
|
|
nbuf->numIps = 0;
|
|
for(std::set<InetAddress>::iterator ip(ipsv[i].begin());ip!=ipsv[i].end();++ip) {
|
|
ZT1_Node_PhysicalAddress *ipb = &(nbuf->ips[nbuf->numIps++]);
|
|
if (ip->isV6()) {
|
|
ipb->type = ZT1_Node_PhysicalAddress::ZT1_Node_PhysicalAddress_TYPE_IPV6;
|
|
memcpy(ipb->bits,ip->rawIpData(),16);
|
|
} else {
|
|
ipb->type = ZT1_Node_PhysicalAddress::ZT1_Node_PhysicalAddress_TYPE_IPV4;
|
|
memcpy(ipb->bits,ip->rawIpData(),4);
|
|
}
|
|
ipb->port = ip->port();
|
|
Utils::scopy(ipb->ascii,sizeof(ipb->ascii),ip->toIpString().c_str());
|
|
}
|
|
}
|
|
|
|
return nl;
|
|
}
|
|
|
|
void Node::freeQueryResult(void *qr)
|
|
throw()
|
|
{
|
|
if (qr)
|
|
::free(qr);
|
|
}
|
|
|
|
bool Node::updateCheck()
|
|
throw()
|
|
{
|
|
_NodeImpl *impl = (_NodeImpl *)_impl;
|
|
RuntimeEnvironment *_r = (RuntimeEnvironment *)&(impl->renv);
|
|
if (_r->updater) {
|
|
_r->updater->checkNow();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
class _VersionStringMaker
|
|
{
|
|
public:
|
|
char vs[32];
|
|
_VersionStringMaker()
|
|
{
|
|
Utils::snprintf(vs,sizeof(vs),"%d.%d.%d",(int)ZEROTIER_ONE_VERSION_MAJOR,(int)ZEROTIER_ONE_VERSION_MINOR,(int)ZEROTIER_ONE_VERSION_REVISION);
|
|
}
|
|
~_VersionStringMaker() {}
|
|
};
|
|
static const _VersionStringMaker __versionString;
|
|
|
|
const char *Node::versionString() throw() { return __versionString.vs; }
|
|
|
|
unsigned int Node::versionMajor() throw() { return ZEROTIER_ONE_VERSION_MAJOR; }
|
|
unsigned int Node::versionMinor() throw() { return ZEROTIER_ONE_VERSION_MINOR; }
|
|
unsigned int Node::versionRevision() throw() { return ZEROTIER_ONE_VERSION_REVISION; }
|
|
|
|
} // namespace ZeroTier
|