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OneService.cpp
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/*
* Copyright (c)2013-2020 ZeroTier, Inc.
*
* Use of this software is governed by the Business Source License included
* in the LICENSE.TXT file in the project's root directory.
*
* Change Date: 2025-01-01
*
* On the date above, in accordance with the Business Source License, use
* of this software will be governed by version 2.0 of the Apache License.
*/
/****/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <string>
#include <map>
#include <vector>
#include <algorithm>
#include <list>
#include <thread>
#include <mutex>
#include <condition_variable>
#include "../version.h"
#include "../include/ZeroTierOne.h"
#include "../node/Constants.hpp"
#include "../node/Mutex.hpp"
#include "../node/Node.hpp"
#include "../node/Utils.hpp"
#include "../node/InetAddress.hpp"
#include "../node/MAC.hpp"
#include "../node/Identity.hpp"
#include "../node/World.hpp"
#include "../node/Salsa20.hpp"
#include "../node/Poly1305.hpp"
#include "../node/SHA512.hpp"
#include "../node/Bond.hpp"
#include "../node/Peer.hpp"
#include "../osdep/Phy.hpp"
#include "../osdep/OSUtils.hpp"
#include "../osdep/Http.hpp"
#include "../osdep/PortMapper.hpp"
#include "../osdep/Binder.hpp"
#include "../osdep/ManagedRoute.hpp"
#include "../osdep/BlockingQueue.hpp"
#include "../osdep/Link.hpp"
#include "OneService.hpp"
#include "SoftwareUpdater.hpp"
#ifdef __WINDOWS__
#include <WinSock2.h>
#include <Windows.h>
#include <ShlObj.h>
#include <netioapi.h>
#include <iphlpapi.h>
//#include <unistd.h>
#define stat _stat
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <ifaddrs.h>
#endif
#ifdef __APPLE__
#include "../osdep/MacDNSHelper.hpp"
#elif defined(__WINDOWS__)
#include "../osdep/WinDNSHelper.hpp"
#endif
#ifdef ZT_USE_SYSTEM_HTTP_PARSER
#include <http_parser.h>
#else
#include "../ext/http-parser/http_parser.h"
#endif
#if ZT_VAULT_SUPPORT
extern "C" {
#include <curl/curl.h>
}
#endif
#include "../ext/json/json.hpp"
using json = nlohmann::json;
#include "../controller/EmbeddedNetworkController.hpp"
#include "../controller/PostgreSQL.hpp"
#include "../controller/Redis.hpp"
#include "../osdep/EthernetTap.hpp"
#ifdef __WINDOWS__
#include "../osdep/WindowsEthernetTap.hpp"
#endif
#ifndef ZT_SOFTWARE_UPDATE_DEFAULT
#define ZT_SOFTWARE_UPDATE_DEFAULT "disable"
#endif
// Sanity limits for HTTP
#define ZT_MAX_HTTP_MESSAGE_SIZE (1024 * 1024 * 64)
#define ZT_MAX_HTTP_CONNECTIONS 65536
// Interface metric for ZeroTier taps -- this ensures that if we are on WiFi and also
// bridged via ZeroTier to the same LAN traffic will (if the OS is sane) prefer WiFi.
#define ZT_IF_METRIC 5000
// How often to check for new multicast subscriptions on a tap device
#define ZT_TAP_CHECK_MULTICAST_INTERVAL 5000
// TCP fallback relay (run by ZeroTier, Inc. -- this will eventually go away)
#ifndef ZT_SDK
#define ZT_TCP_FALLBACK_RELAY "204.80.128.1/443"
#endif
// Frequency at which we re-resolve the TCP fallback relay
#define ZT_TCP_FALLBACK_RERESOLVE_DELAY 86400000
// Attempt to engage TCP fallback after this many ms of no reply to packets sent to global-scope IPs
#define ZT_TCP_FALLBACK_AFTER 60000
// How often to check for local interface addresses
#define ZT_LOCAL_INTERFACE_CHECK_INTERVAL 60000
// Maximum write buffer size for outgoing TCP connections (sanity limit)
#define ZT_TCP_MAX_WRITEQ_SIZE 33554432
// TCP activity timeout
#define ZT_TCP_ACTIVITY_TIMEOUT 60000
#if ZT_VAULT_SUPPORT
size_t curlResponseWrite(void *ptr, size_t size, size_t nmemb, std::string *data)
{
data->append((char*)ptr, size * nmemb);
return size * nmemb;
}
#endif
namespace ZeroTier {
namespace {
static const InetAddress NULL_INET_ADDR;
// Fake TLS hello for TCP tunnel outgoing connections (TUNNELED mode)
static const char ZT_TCP_TUNNEL_HELLO[9] = { 0x17,0x03,0x03,0x00,0x04,(char)ZEROTIER_ONE_VERSION_MAJOR,(char)ZEROTIER_ONE_VERSION_MINOR,(char)((ZEROTIER_ONE_VERSION_REVISION >> 8) & 0xff),(char)(ZEROTIER_ONE_VERSION_REVISION & 0xff) };
static std::string _trimString(const std::string &s)
{
unsigned long end = (unsigned long)s.length();
while (end) {
char c = s[end - 1];
if ((c == ' ')||(c == '\r')||(c == '\n')||(!c)||(c == '\t'))
--end;
else break;
}
unsigned long start = 0;
while (start < end) {
char c = s[start];
if ((c == ' ')||(c == '\r')||(c == '\n')||(!c)||(c == '\t'))
++start;
else break;
}
return s.substr(start,end - start);
}
static void _networkToJson(nlohmann::json &nj,const ZT_VirtualNetworkConfig *nc,const std::string &portDeviceName,const OneService::NetworkSettings &localSettings)
{
char tmp[256];
const char *nstatus = "",*ntype = "";
switch(nc->status) {
case ZT_NETWORK_STATUS_REQUESTING_CONFIGURATION: nstatus = "REQUESTING_CONFIGURATION"; break;
case ZT_NETWORK_STATUS_OK: nstatus = "OK"; break;
case ZT_NETWORK_STATUS_ACCESS_DENIED: nstatus = "ACCESS_DENIED"; break;
case ZT_NETWORK_STATUS_NOT_FOUND: nstatus = "NOT_FOUND"; break;
case ZT_NETWORK_STATUS_PORT_ERROR: nstatus = "PORT_ERROR"; break;
case ZT_NETWORK_STATUS_CLIENT_TOO_OLD: nstatus = "CLIENT_TOO_OLD"; break;
}
switch(nc->type) {
case ZT_NETWORK_TYPE_PRIVATE: ntype = "PRIVATE"; break;
case ZT_NETWORK_TYPE_PUBLIC: ntype = "PUBLIC"; break;
}
OSUtils::ztsnprintf(tmp,sizeof(tmp),"%.16llx",nc->nwid);
nj["id"] = tmp;
nj["nwid"] = tmp;
OSUtils::ztsnprintf(tmp,sizeof(tmp),"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",(unsigned int)((nc->mac >> 40) & 0xff),(unsigned int)((nc->mac >> 32) & 0xff),(unsigned int)((nc->mac >> 24) & 0xff),(unsigned int)((nc->mac >> 16) & 0xff),(unsigned int)((nc->mac >> 8) & 0xff),(unsigned int)(nc->mac & 0xff));
nj["mac"] = tmp;
nj["name"] = nc->name;
nj["status"] = nstatus;
nj["type"] = ntype;
nj["mtu"] = nc->mtu;
nj["dhcp"] = (bool)(nc->dhcp != 0);
nj["bridge"] = (bool)(nc->bridge != 0);
nj["broadcastEnabled"] = (bool)(nc->broadcastEnabled != 0);
nj["portError"] = nc->portError;
nj["netconfRevision"] = nc->netconfRevision;
nj["portDeviceName"] = portDeviceName;
nj["allowManaged"] = localSettings.allowManaged;
nj["allowGlobal"] = localSettings.allowGlobal;
nj["allowDefault"] = localSettings.allowDefault;
nj["allowDNS"] = localSettings.allowDNS;
nlohmann::json aa = nlohmann::json::array();
for(unsigned int i=0;i<nc->assignedAddressCount;++i) {
aa.push_back(reinterpret_cast<const InetAddress *>(&(nc->assignedAddresses[i]))->toString(tmp));
}
nj["assignedAddresses"] = aa;
nlohmann::json ra = nlohmann::json::array();
for(unsigned int i=0;i<nc->routeCount;++i) {
nlohmann::json rj;
rj["target"] = reinterpret_cast<const InetAddress *>(&(nc->routes[i].target))->toString(tmp);
if (nc->routes[i].via.ss_family == nc->routes[i].target.ss_family)
rj["via"] = reinterpret_cast<const InetAddress *>(&(nc->routes[i].via))->toIpString(tmp);
else rj["via"] = nlohmann::json();
rj["flags"] = (int)nc->routes[i].flags;
rj["metric"] = (int)nc->routes[i].metric;
ra.push_back(rj);
}
nj["routes"] = ra;
nlohmann::json mca = nlohmann::json::array();
for(unsigned int i=0;i<nc->multicastSubscriptionCount;++i) {
nlohmann::json m;
m["mac"] = MAC(nc->multicastSubscriptions[i].mac).toString(tmp);
m["adi"] = nc->multicastSubscriptions[i].adi;
mca.push_back(m);
}
nj["multicastSubscriptions"] = mca;
nlohmann::json m;
m["domain"] = nc->dns.domain;
m["servers"] = nlohmann::json::array();
for(int j=0;j<ZT_MAX_DNS_SERVERS;++j) {
InetAddress a(nc->dns.server_addr[j]);
if (a.isV4() || a.isV6()) {
char buf[256];
m["servers"].push_back(a.toIpString(buf));
}
}
nj["dns"] = m;
}
static void _peerToJson(nlohmann::json &pj,const ZT_Peer *peer)
{
char tmp[256];
const char *prole = "";
switch(peer->role) {
case ZT_PEER_ROLE_LEAF: prole = "LEAF"; break;
case ZT_PEER_ROLE_MOON: prole = "MOON"; break;
case ZT_PEER_ROLE_PLANET: prole = "PLANET"; break;
}
OSUtils::ztsnprintf(tmp,sizeof(tmp),"%.10llx",peer->address);
pj["address"] = tmp;
pj["versionMajor"] = peer->versionMajor;
pj["versionMinor"] = peer->versionMinor;
pj["versionRev"] = peer->versionRev;
OSUtils::ztsnprintf(tmp,sizeof(tmp),"%d.%d.%d",peer->versionMajor,peer->versionMinor,peer->versionRev);
pj["version"] = tmp;
pj["latency"] = peer->latency;
pj["role"] = prole;
pj["isBonded"] = peer->isBonded;
pj["bondingPolicy"] = peer->bondingPolicy;
pj["isHealthy"] = peer->isHealthy;
pj["numAliveLinks"] = peer->numAliveLinks;
pj["numTotalLinks"] = peer->numTotalLinks;
nlohmann::json pa = nlohmann::json::array();
for(unsigned int i=0;i<peer->pathCount;++i) {
int64_t lastSend = peer->paths[i].lastSend;
int64_t lastReceive = peer->paths[i].lastReceive;
nlohmann::json j;
j["address"] = reinterpret_cast<const InetAddress *>(&(peer->paths[i].address))->toString(tmp);
j["lastSend"] = (lastSend < 0) ? 0 : lastSend;
j["lastReceive"] = (lastReceive < 0) ? 0 : lastReceive;
j["trustedPathId"] = peer->paths[i].trustedPathId;
j["active"] = (bool)(peer->paths[i].expired == 0);
j["expired"] = (bool)(peer->paths[i].expired != 0);
j["preferred"] = (bool)(peer->paths[i].preferred != 0);
pa.push_back(j);
}
pj["paths"] = pa;
}
static void _peerBondToJson(nlohmann::json &pj,const ZT_Peer *peer)
{
char tmp[256];
OSUtils::ztsnprintf(tmp,sizeof(tmp),"%.10llx",peer->address);
//pj["aggregateLinkLatency"] = peer->latency;
std::string policyStr = BondController::getPolicyStrByCode(peer->bondingPolicy);
pj["policy"] = policyStr;
nlohmann::json pa = nlohmann::json::array();
for(unsigned int i=0;i<peer->pathCount;++i) {
int64_t lastSend = peer->paths[i].lastSend;
int64_t lastReceive = peer->paths[i].lastReceive;
nlohmann::json j;
j["ifname"] = std::string(peer->paths[i].ifname);
j["path"] = reinterpret_cast<const InetAddress *>(&(peer->paths[i].address))->toString(tmp);
j["lastTX"] = (lastSend < 0) ? 0 : lastSend;
j["lastRX"] = (lastReceive < 0) ? 0 : lastReceive;
j["lat"] = peer->paths[i].latencyMean;
j["pdv"] = peer->paths[i].latencyVariance;
//j["trustedPathId"] = peer->paths[i].trustedPathId;
//j["active"] = (bool)(peer->paths[i].expired == 0);
//j["expired"] = (bool)(peer->paths[i].expired != 0);
//j["preferred"] = (bool)(peer->paths[i].preferred != 0);
//j["ltm"] = peer->paths[i].latencyMax;
//j["plr"] = peer->paths[i].packetLossRatio;
//j["per"] = peer->paths[i].packetErrorRatio;
//j["thr"] = peer->paths[i].throughputMean;
//j["thm"] = peer->paths[i].throughputMax;
//j["thv"] = peer->paths[i].throughputVariance;
//j["avl"] = peer->paths[i].availability;
//j["age"] = peer->paths[i].age;
//j["alloc"] = peer->paths[i].allocation;
//j["ifname"] = peer->paths[i].ifname;
pa.push_back(j);
}
pj["links"] = pa;
}
static void _moonToJson(nlohmann::json &mj,const World &world)
{
char tmp[4096];
OSUtils::ztsnprintf(tmp,sizeof(tmp),"%.16llx",world.id());
mj["id"] = tmp;
mj["timestamp"] = world.timestamp();
mj["signature"] = Utils::hex(world.signature().data,ZT_C25519_SIGNATURE_LEN,tmp);
mj["updatesMustBeSignedBy"] = Utils::hex(world.updatesMustBeSignedBy().data,ZT_C25519_PUBLIC_KEY_LEN,tmp);
nlohmann::json ra = nlohmann::json::array();
for(std::vector<World::Root>::const_iterator r(world.roots().begin());r!=world.roots().end();++r) {
nlohmann::json rj;
rj["identity"] = r->identity.toString(false,tmp);
nlohmann::json eps = nlohmann::json::array();
for(std::vector<InetAddress>::const_iterator a(r->stableEndpoints.begin());a!=r->stableEndpoints.end();++a)
eps.push_back(a->toString(tmp));
rj["stableEndpoints"] = eps;
ra.push_back(rj);
}
mj["roots"] = ra;
mj["waiting"] = false;
}
class OneServiceImpl;
static int SnodeVirtualNetworkConfigFunction(ZT_Node *node,void *uptr,void *tptr,uint64_t nwid,void **nuptr,enum ZT_VirtualNetworkConfigOperation op,const ZT_VirtualNetworkConfig *nwconf);
static void SnodeEventCallback(ZT_Node *node,void *uptr,void *tptr,enum ZT_Event event,const void *metaData);
static void SnodeStatePutFunction(ZT_Node *node,void *uptr,void *tptr,enum ZT_StateObjectType type,const uint64_t id[2],const void *data,int len);
static int SnodeStateGetFunction(ZT_Node *node,void *uptr,void *tptr,enum ZT_StateObjectType type,const uint64_t id[2],void *data,unsigned int maxlen);
static int SnodeWirePacketSendFunction(ZT_Node *node,void *uptr,void *tptr,int64_t localSocket,const struct sockaddr_storage *addr,const void *data,unsigned int len,unsigned int ttl);
static void SnodeVirtualNetworkFrameFunction(ZT_Node *node,void *uptr,void *tptr,uint64_t nwid,void **nuptr,uint64_t sourceMac,uint64_t destMac,unsigned int etherType,unsigned int vlanId,const void *data,unsigned int len);
static int SnodePathCheckFunction(ZT_Node *node,void *uptr,void *tptr,uint64_t ztaddr,int64_t localSocket,const struct sockaddr_storage *remoteAddr);
static int SnodePathLookupFunction(ZT_Node *node,void *uptr,void *tptr,uint64_t ztaddr,int family,struct sockaddr_storage *result);
static void StapFrameHandler(void *uptr,void *tptr,uint64_t nwid,const MAC &from,const MAC &to,unsigned int etherType,unsigned int vlanId,const void *data,unsigned int len);
static int ShttpOnMessageBegin(http_parser *parser);
static int ShttpOnUrl(http_parser *parser,const char *ptr,size_t length);
#if (HTTP_PARSER_VERSION_MAJOR >= 2) && (HTTP_PARSER_VERSION_MINOR >= 2)
static int ShttpOnStatus(http_parser *parser,const char *ptr,size_t length);
#else
static int ShttpOnStatus(http_parser *parser);
#endif
static int ShttpOnHeaderField(http_parser *parser,const char *ptr,size_t length);
static int ShttpOnValue(http_parser *parser,const char *ptr,size_t length);
static int ShttpOnHeadersComplete(http_parser *parser);
static int ShttpOnBody(http_parser *parser,const char *ptr,size_t length);
static int ShttpOnMessageComplete(http_parser *parser);
#if (HTTP_PARSER_VERSION_MAJOR >= 2) && (HTTP_PARSER_VERSION_MINOR >= 1)
static const struct http_parser_settings HTTP_PARSER_SETTINGS = {
ShttpOnMessageBegin,
ShttpOnUrl,
ShttpOnStatus,
ShttpOnHeaderField,
ShttpOnValue,
ShttpOnHeadersComplete,
ShttpOnBody,
ShttpOnMessageComplete
};
#else
static const struct http_parser_settings HTTP_PARSER_SETTINGS = {
ShttpOnMessageBegin,
ShttpOnUrl,
ShttpOnHeaderField,
ShttpOnValue,
ShttpOnHeadersComplete,
ShttpOnBody,
ShttpOnMessageComplete
};
#endif
/**
* A TCP connection and related state and buffers
*/
struct TcpConnection
{
enum {
TCP_UNCATEGORIZED_INCOMING, // uncategorized incoming connection
TCP_HTTP_INCOMING,
TCP_HTTP_OUTGOING,
TCP_TUNNEL_OUTGOING // TUNNELED mode proxy outbound connection
} type;
OneServiceImpl *parent;
PhySocket *sock;
InetAddress remoteAddr;
uint64_t lastReceive;
// Used for inbound HTTP connections
http_parser parser;
unsigned long messageSize;
std::string currentHeaderField;
std::string currentHeaderValue;
std::string url;
std::string status;
std::map< std::string,std::string > headers;
std::string readq;
std::string writeq;
Mutex writeq_m;
};
struct OneServiceIncomingPacket
{
uint64_t now;
int64_t sock;
struct sockaddr_storage from;
unsigned int size;
uint8_t data[ZT_MAX_MTU];
};
class OneServiceImpl : public OneService
{
public:
// begin member variables --------------------------------------------------
const std::string _homePath;
std::string _authToken;
std::string _controllerDbPath;
const std::string _networksPath;
const std::string _moonsPath;
EmbeddedNetworkController *_controller;
Phy<OneServiceImpl *> _phy;
Node *_node;
SoftwareUpdater *_updater;
PhySocket *_localControlSocket4;
PhySocket *_localControlSocket6;
bool _updateAutoApply;
bool _allowTcpFallbackRelay;
bool _allowSecondaryPort;
unsigned int _primaryPort;
unsigned int _secondaryPort;
unsigned int _tertiaryPort;
volatile unsigned int _udpPortPickerCounter;
// Local configuration and memo-ized information from it
json _localConfig;
Hashtable< uint64_t,std::vector<InetAddress> > _v4Hints;
Hashtable< uint64_t,std::vector<InetAddress> > _v6Hints;
Hashtable< uint64_t,std::vector<InetAddress> > _v4Blacklists;
Hashtable< uint64_t,std::vector<InetAddress> > _v6Blacklists;
std::vector< InetAddress > _globalV4Blacklist;
std::vector< InetAddress > _globalV6Blacklist;
std::vector< InetAddress > _allowManagementFrom;
std::vector< std::string > _interfacePrefixBlacklist;
Mutex _localConfig_m;
std::vector<InetAddress> explicitBind;
/*
* To attempt to handle NAT/gateway craziness we use three local UDP ports:
*
* [0] is the normal/default port, usually 9993
* [1] is a port derived from our ZeroTier address
* [2] is a port computed from the normal/default for use with uPnP/NAT-PMP mappings
*
* [2] exists because on some gateways trying to do regular NAT-t interferes
* destructively with uPnP port mapping behavior in very weird buggy ways.
* It's only used if uPnP/NAT-PMP is enabled in this build.
*/
unsigned int _ports[3];
Binder _binder;
// Time we last received a packet from a global address
uint64_t _lastDirectReceiveFromGlobal;
#ifdef ZT_TCP_FALLBACK_RELAY
uint64_t _lastSendToGlobalV4;
#endif
// Last potential sleep/wake event
uint64_t _lastRestart;
// Deadline for the next background task service function
volatile int64_t _nextBackgroundTaskDeadline;
// Configured networks
struct NetworkState
{
NetworkState() :
tap((EthernetTap *)0)
{
// Real defaults are in network 'up' code in network event handler
settings.allowManaged = true;
settings.allowGlobal = false;
settings.allowDefault = false;
settings.allowDNS = false;
memset(&config, 0, sizeof(ZT_VirtualNetworkConfig));
}
std::shared_ptr<EthernetTap> tap;
ZT_VirtualNetworkConfig config; // memcpy() of raw config from core
std::vector<InetAddress> managedIps;
std::map< InetAddress, SharedPtr<ManagedRoute> > managedRoutes;
NetworkSettings settings;
};
std::map<uint64_t,NetworkState> _nets;
Mutex _nets_m;
// Active TCP/IP connections
std::vector< TcpConnection * > _tcpConnections;
Mutex _tcpConnections_m;
TcpConnection *_tcpFallbackTunnel;
// Termination status information
ReasonForTermination _termReason;
std::string _fatalErrorMessage;
Mutex _termReason_m;
// uPnP/NAT-PMP port mapper if enabled
bool _portMappingEnabled; // local.conf settings
#ifdef ZT_USE_MINIUPNPC
PortMapper *_portMapper;
#endif
// HashiCorp Vault Settings
#if ZT_VAULT_SUPPORT
bool _vaultEnabled;
std::string _vaultURL;
std::string _vaultToken;
std::string _vaultPath; // defaults to cubbyhole/zerotier/identity.secret for per-access key storage
#endif
// Set to false to force service to stop
volatile bool _run;
Mutex _run_m;
RedisConfig *_rc;
// end member variables ----------------------------------------------------
OneServiceImpl(const char *hp,unsigned int port) :
_homePath((hp) ? hp : ".")
,_controllerDbPath(_homePath + ZT_PATH_SEPARATOR_S "controller.d")
,_networksPath(_homePath + ZT_PATH_SEPARATOR_S "networks.d")
,_moonsPath(_homePath + ZT_PATH_SEPARATOR_S "moons.d")
,_controller((EmbeddedNetworkController *)0)
,_phy(this,false,true)
,_node((Node *)0)
,_updater((SoftwareUpdater *)0)
,_localControlSocket4((PhySocket *)0)
,_localControlSocket6((PhySocket *)0)
,_updateAutoApply(false)
,_primaryPort(port)
,_udpPortPickerCounter(0)
,_lastDirectReceiveFromGlobal(0)
#ifdef ZT_TCP_FALLBACK_RELAY
,_lastSendToGlobalV4(0)
#endif
,_lastRestart(0)
,_nextBackgroundTaskDeadline(0)
,_tcpFallbackTunnel((TcpConnection *)0)
,_termReason(ONE_STILL_RUNNING)
,_portMappingEnabled(true)
#ifdef ZT_USE_MINIUPNPC
,_portMapper((PortMapper *)0)
#endif
#ifdef ZT_VAULT_SUPPORT
,_vaultEnabled(false)
,_vaultURL()
,_vaultToken()
,_vaultPath("cubbyhole/zerotier")
#endif
,_run(true)
,_rc(NULL)
{
_ports[0] = 0;
_ports[1] = 0;
_ports[2] = 0;
#if ZT_VAULT_SUPPORT
curl_global_init(CURL_GLOBAL_DEFAULT);
#endif
}
virtual ~OneServiceImpl()
{
_binder.closeAll(_phy);
_phy.close(_localControlSocket4);
_phy.close(_localControlSocket6);
#if ZT_VAULT_SUPPORT
curl_global_cleanup();
#endif
#ifdef ZT_USE_MINIUPNPC
delete _portMapper;
#endif
delete _controller;
delete _rc;
}
virtual ReasonForTermination run()
{
try {
{
const std::string authTokenPath(_homePath + ZT_PATH_SEPARATOR_S "authtoken.secret");
if (!OSUtils::readFile(authTokenPath.c_str(),_authToken)) {
unsigned char foo[24];
Utils::getSecureRandom(foo,sizeof(foo));
_authToken = "";
for(unsigned int i=0;i<sizeof(foo);++i)
_authToken.push_back("abcdefghijklmnopqrstuvwxyz0123456789"[(unsigned long)foo[i] % 36]);
if (!OSUtils::writeFile(authTokenPath.c_str(),_authToken)) {
Mutex::Lock _l(_termReason_m);
_termReason = ONE_UNRECOVERABLE_ERROR;
_fatalErrorMessage = "authtoken.secret could not be written";
return _termReason;
} else {
OSUtils::lockDownFile(authTokenPath.c_str(),false);
}
}
_authToken = _trimString(_authToken);
}
{
struct ZT_Node_Callbacks cb;
cb.version = 0;
cb.stateGetFunction = SnodeStateGetFunction;
cb.statePutFunction = SnodeStatePutFunction;
cb.wirePacketSendFunction = SnodeWirePacketSendFunction;
cb.virtualNetworkFrameFunction = SnodeVirtualNetworkFrameFunction;
cb.virtualNetworkConfigFunction = SnodeVirtualNetworkConfigFunction;
cb.eventCallback = SnodeEventCallback;
cb.pathCheckFunction = SnodePathCheckFunction;
cb.pathLookupFunction = SnodePathLookupFunction;
_node = new Node(this,(void *)0,&cb,OSUtils::now());
}
// local.conf
readLocalSettings();
applyLocalConfig();
// Make sure we can use the primary port, and hunt for one if configured to do so
const int portTrials = (_primaryPort == 0) ? 256 : 1; // if port is 0, pick random
for(int k=0;k<portTrials;++k) {
if (_primaryPort == 0) {
unsigned int randp = 0;
Utils::getSecureRandom(&randp,sizeof(randp));
_primaryPort = 20000 + (randp % 45500);
}
if (_trialBind(_primaryPort)) {
_ports[0] = _primaryPort;
} else {
_primaryPort = 0;
}
}
if (_ports[0] == 0) {
Mutex::Lock _l(_termReason_m);
_termReason = ONE_UNRECOVERABLE_ERROR;
_fatalErrorMessage = "cannot bind to local control interface port";
return _termReason;
}
// Bind TCP control socket to 127.0.0.1 and ::1 as well for loopback TCP control socket queries
{
struct sockaddr_in lo4;
memset(&lo4,0,sizeof(lo4));
lo4.sin_family = AF_INET;
lo4.sin_addr.s_addr = Utils::hton((uint32_t)0x7f000001);
lo4.sin_port = Utils::hton((uint16_t)_ports[0]);
_localControlSocket4 = _phy.tcpListen((const struct sockaddr *)&lo4);
struct sockaddr_in6 lo6;
memset(&lo6,0,sizeof(lo6));
lo6.sin6_family = AF_INET6;
lo6.sin6_addr.s6_addr[15] = 1;
lo6.sin6_port = lo4.sin_port;
_localControlSocket6 = _phy.tcpListen((const struct sockaddr *)&lo6);
}
// Save primary port to a file so CLIs and GUIs can learn it easily
char portstr[64];
OSUtils::ztsnprintf(portstr,sizeof(portstr),"%u",_ports[0]);
OSUtils::writeFile((_homePath + ZT_PATH_SEPARATOR_S "zerotier-one.port").c_str(),std::string(portstr));
// Attempt to bind to a secondary port chosen from our ZeroTier address.
// This exists because there are buggy NATs out there that fail if more
// than one device behind the same NAT tries to use the same internal
// private address port number. Buggy NATs are a running theme.
if (_allowSecondaryPort) {
if (_secondaryPort) {
_ports[1] = _secondaryPort;
} else {
_ports[1] = 20000 + ((unsigned int)_node->address() % 45500);
for(int i=0;;++i) {
if (i > 1000) {
_ports[1] = 0;
break;
} else if (++_ports[1] >= 65536) {
_ports[1] = 20000;
}
if (_trialBind(_ports[1]))
break;
}
}
}
#ifdef ZT_USE_MINIUPNPC
if (_portMappingEnabled) {
// If we're running uPnP/NAT-PMP, bind a *third* port for that. We can't
// use the other two ports for that because some NATs do really funky
// stuff with ports that are explicitly mapped that breaks things.
if (_ports[1]) {
if (_tertiaryPort) {
_ports[2] = _tertiaryPort;
} else {
_ports[2] = _ports[1];
for(int i=0;;++i) {
if (i > 1000) {
_ports[2] = 0;
break;
} else if (++_ports[2] >= 65536) {
_ports[2] = 20000;
}
if (_trialBind(_ports[2]))
break;
}
if (_ports[2]) {
char uniqueName[64];
OSUtils::ztsnprintf(uniqueName,sizeof(uniqueName),"ZeroTier/%.10llx@%u",_node->address(),_ports[2]);
_portMapper = new PortMapper(_ports[2],uniqueName);
}
}
}
}
#endif
// Delete legacy iddb.d if present (cleanup)
OSUtils::rmDashRf((_homePath + ZT_PATH_SEPARATOR_S "iddb.d").c_str());
// Network controller is now enabled by default for desktop and server
_controller = new EmbeddedNetworkController(_node,_homePath.c_str(),_controllerDbPath.c_str(),_ports[0], _rc);
_node->setNetconfMaster((void *)_controller);
// Join existing networks in networks.d
{
std::vector<std::string> networksDotD(OSUtils::listDirectory((_homePath + ZT_PATH_SEPARATOR_S "networks.d").c_str()));
for(std::vector<std::string>::iterator f(networksDotD.begin());f!=networksDotD.end();++f) {
std::size_t dot = f->find_last_of('.');
if ((dot == 16)&&(f->substr(16) == ".conf"))
_node->join(Utils::hexStrToU64(f->substr(0,dot).c_str()),(void *)0,(void *)0);
}
}
// Orbit existing moons in moons.d
{
std::vector<std::string> moonsDotD(OSUtils::listDirectory((_homePath + ZT_PATH_SEPARATOR_S "moons.d").c_str()));
for(std::vector<std::string>::iterator f(moonsDotD.begin());f!=moonsDotD.end();++f) {
std::size_t dot = f->find_last_of('.');
if ((dot == 16)&&(f->substr(16) == ".moon"))
_node->orbit((void *)0,Utils::hexStrToU64(f->substr(0,dot).c_str()),0);
}
}
// Main I/O loop
_nextBackgroundTaskDeadline = 0;
int64_t clockShouldBe = OSUtils::now();
_lastRestart = clockShouldBe;
int64_t lastTapMulticastGroupCheck = 0;
int64_t lastBindRefresh = 0;
int64_t lastUpdateCheck = clockShouldBe;
int64_t lastCleanedPeersDb = 0;
int64_t lastLocalInterfaceAddressCheck = (clockShouldBe - ZT_LOCAL_INTERFACE_CHECK_INTERVAL) + 15000; // do this in 15s to give portmapper time to configure and other things time to settle
int64_t lastLocalConfFileCheck = OSUtils::now();
for(;;) {
_run_m.lock();
if (!_run) {
_run_m.unlock();
_termReason_m.lock();
_termReason = ONE_NORMAL_TERMINATION;
_termReason_m.unlock();
break;
} else {
_run_m.unlock();
}
const int64_t now = OSUtils::now();
// Attempt to detect sleep/wake events by detecting delay overruns
bool restarted = false;
if ((now > clockShouldBe)&&((now - clockShouldBe) > 10000)) {
_lastRestart = now;
restarted = true;
}
// Check for updates (if enabled)
if ((_updater)&&((now - lastUpdateCheck) > 10000)) {
lastUpdateCheck = now;
if (_updater->check(now) && _updateAutoApply)
_updater->apply();
}
// Reload local.conf if anything changed recently
if ((now - lastLocalConfFileCheck) >= ZT_LOCAL_CONF_FILE_CHECK_INTERVAL) {
lastLocalConfFileCheck = now;
struct stat result;
if(stat((_homePath + ZT_PATH_SEPARATOR_S "local.conf").c_str(), &result)==0) {
int64_t mod_time = result.st_mtime * 1000;
if ((now - mod_time) <= ZT_LOCAL_CONF_FILE_CHECK_INTERVAL) {
readLocalSettings();
applyLocalConfig();
}
}
}
// Refresh bindings in case device's interfaces have changed, and also sync routes to update any shadow routes (e.g. shadow default)
if (((now - lastBindRefresh) >= (_node->bondController()->inUse() ? ZT_BINDER_REFRESH_PERIOD / 4 : ZT_BINDER_REFRESH_PERIOD))||(restarted)) {
lastBindRefresh = now;
unsigned int p[3];
unsigned int pc = 0;
for(int i=0;i<3;++i) {
if (_ports[i])
p[pc++] = _ports[i];
}
_binder.refresh(_phy,p,pc,explicitBind,*this);
{
Mutex::Lock _l(_nets_m);
for(std::map<uint64_t,NetworkState>::iterator n(_nets.begin());n!=_nets.end();++n) {
if (n->second.tap)
syncManagedStuff(n->second,false,true,false);
}
}
}
// Run background task processor in core if it's time to do so
int64_t dl = _nextBackgroundTaskDeadline;
if (dl <= now) {
_node->processBackgroundTasks((void *)0,now,&_nextBackgroundTaskDeadline);
dl = _nextBackgroundTaskDeadline;
}
// Close TCP fallback tunnel if we have direct UDP
if ((_tcpFallbackTunnel)&&((now - _lastDirectReceiveFromGlobal) < (ZT_TCP_FALLBACK_AFTER / 2)))
_phy.close(_tcpFallbackTunnel->sock);
// Sync multicast group memberships
if ((now - lastTapMulticastGroupCheck) >= ZT_TAP_CHECK_MULTICAST_INTERVAL) {
lastTapMulticastGroupCheck = now;
std::vector< std::pair< uint64_t,std::pair< std::vector<MulticastGroup>,std::vector<MulticastGroup> > > > mgChanges;
{
Mutex::Lock _l(_nets_m);
mgChanges.reserve(_nets.size() + 1);
for(std::map<uint64_t,NetworkState>::const_iterator n(_nets.begin());n!=_nets.end();++n) {
if (n->second.tap) {
mgChanges.push_back(std::pair< uint64_t,std::pair< std::vector<MulticastGroup>,std::vector<MulticastGroup> > >(n->first,std::pair< std::vector<MulticastGroup>,std::vector<MulticastGroup> >()));
n->second.tap->scanMulticastGroups(mgChanges.back().second.first,mgChanges.back().second.second);
}
}
}
for(std::vector< std::pair< uint64_t,std::pair< std::vector<MulticastGroup>,std::vector<MulticastGroup> > > >::iterator c(mgChanges.begin());c!=mgChanges.end();++c) {
for(std::vector<MulticastGroup>::iterator m(c->second.first.begin());m!=c->second.first.end();++m)
_node->multicastSubscribe((void *)0,c->first,m->mac().toInt(),m->adi());
for(std::vector<MulticastGroup>::iterator m(c->second.second.begin());m!=c->second.second.end();++m)
_node->multicastUnsubscribe(c->first,m->mac().toInt(),m->adi());
}
}
// Sync information about physical network interfaces
if ((now - lastLocalInterfaceAddressCheck) >= (_node->bondController()->inUse() ? ZT_LOCAL_INTERFACE_CHECK_INTERVAL / 8 : ZT_LOCAL_INTERFACE_CHECK_INTERVAL)) {
lastLocalInterfaceAddressCheck = now;
_node->clearLocalInterfaceAddresses();
#ifdef ZT_USE_MINIUPNPC
if (_portMapper) {
std::vector<InetAddress> mappedAddresses(_portMapper->get());
for(std::vector<InetAddress>::const_iterator ext(mappedAddresses.begin());ext!=mappedAddresses.end();++ext)
_node->addLocalInterfaceAddress(reinterpret_cast<const struct sockaddr_storage *>(&(*ext)));
}
#endif
std::vector<InetAddress> boundAddrs(_binder.allBoundLocalInterfaceAddresses());
for(std::vector<InetAddress>::const_iterator i(boundAddrs.begin());i!=boundAddrs.end();++i) {
_node->addLocalInterfaceAddress(reinterpret_cast<const struct sockaddr_storage *>(&(*i)));
}
}
// Clean peers.d periodically
if ((now - lastCleanedPeersDb) >= 3600000) {
lastCleanedPeersDb = now;
OSUtils::cleanDirectory((_homePath + ZT_PATH_SEPARATOR_S "peers.d").c_str(),now - 2592000000LL); // delete older than 30 days
}
const unsigned long delay = (dl > now) ? (unsigned long)(dl - now) : 500;
clockShouldBe = now + (int64_t)delay;
_phy.poll(delay);
}
} catch (std::exception &e) {
Mutex::Lock _l(_termReason_m);
_termReason = ONE_UNRECOVERABLE_ERROR;
_fatalErrorMessage = std::string("unexpected exception in main thread: ")+e.what();
} catch ( ... ) {
Mutex::Lock _l(_termReason_m);
_termReason = ONE_UNRECOVERABLE_ERROR;
_fatalErrorMessage = "unexpected exception in main thread: unknown exception";
}
try {
Mutex::Lock _l(_tcpConnections_m);
while (!_tcpConnections.empty())
_phy.close((*_tcpConnections.begin())->sock);
} catch ( ... ) {}
{
Mutex::Lock _l(_nets_m);
_nets.clear();
}
delete _updater;
_updater = (SoftwareUpdater *)0;
delete _node;
_node = (Node *)0;
return _termReason;
}
void readLocalSettings()
{
// Read local configuration
std::map<InetAddress,ZT_PhysicalPathConfiguration> ppc;
// LEGACY: support old "trustedpaths" flat file
FILE *trustpaths = fopen((_homePath + ZT_PATH_SEPARATOR_S "trustedpaths").c_str(),"r");
if (trustpaths) {
fprintf(stderr,"WARNING: 'trustedpaths' flat file format is deprecated in favor of path definitions in local.conf" ZT_EOL_S);
char buf[1024];
while (fgets(buf,sizeof(buf),trustpaths)) {
int fno = 0;
char *saveptr = (char *)0;
uint64_t trustedPathId = 0;
InetAddress trustedPathNetwork;
for(char *f=Utils::stok(buf,"=\r\n \t",&saveptr);(f);f=Utils::stok((char *)0,"=\r\n \t",&saveptr)) {
if (fno == 0) {
trustedPathId = Utils::hexStrToU64(f);
} else if (fno == 1) {
trustedPathNetwork = InetAddress(f);
} else break;
++fno;
}
if ( (trustedPathId != 0) && ((trustedPathNetwork.ss_family == AF_INET)||(trustedPathNetwork.ss_family == AF_INET6)) && (trustedPathNetwork.netmaskBits() > 0) ) {
ppc[trustedPathNetwork].trustedPathId = trustedPathId;
ppc[trustedPathNetwork].mtu = 0; // use default
}
}
fclose(trustpaths);
}
// Read local config file
Mutex::Lock _l2(_localConfig_m);
std::string lcbuf;
if (OSUtils::readFile((_homePath + ZT_PATH_SEPARATOR_S "local.conf").c_str(),lcbuf)) {
if (lcbuf.length() > 0) {
try {
_localConfig = OSUtils::jsonParse(lcbuf);
if (!_localConfig.is_object()) {
fprintf(stderr,"ERROR: unable to parse local.conf (root element is not a JSON object)" ZT_EOL_S);
exit(1);
}
} catch ( ... ) {
fprintf(stderr,"ERROR: unable to parse local.conf (invalid JSON)" ZT_EOL_S);
exit(1);
}
}
}