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OneService.cpp
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OneService.cpp
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/*
* ZeroTier One - Network Virtualization Everywhere
* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <string>
#include <map>
#include <set>
#include <vector>
#include <algorithm>
#include <list>
#include "../version.h"
#include "../include/ZeroTierOne.h"
#ifdef ZT_USE_SYSTEM_HTTP_PARSER
#include <http_parser.h>
#else
#include "../ext/http-parser/http_parser.h"
#endif
#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 "../osdep/Phy.hpp"
#include "../osdep/Thread.hpp"
#include "../osdep/OSUtils.hpp"
#include "../osdep/Http.hpp"
#include "../osdep/BackgroundResolver.hpp"
#include "../osdep/PortMapper.hpp"
#include "../osdep/Binder.hpp"
#include "../osdep/ManagedRoute.hpp"
#include "OneService.hpp"
#include "ControlPlane.hpp"
#include "ClusterGeoIpService.hpp"
#include "ClusterDefinition.hpp"
/**
* Uncomment to enable UDP breakage switch
*
* If this is defined, the presence of a file called /tmp/ZT_BREAK_UDP
* will cause direct UDP TX/RX to stop working. This can be used to
* test TCP tunneling fallback and other robustness features. Deleting
* this file will cause it to start working again.
*/
//#define ZT_BREAK_UDP
#ifdef ZT_ENABLE_NETWORK_CONTROLLER
#include "../controller/SqliteNetworkController.hpp"
#else
class SqliteNetworkController;
#endif // ZT_ENABLE_NETWORK_CONTROLLER
#ifdef __WINDOWS__
#include <WinSock2.h>
#include <Windows.h>
#include <ShlObj.h>
#include <netioapi.h>
#include <iphlpapi.h>
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <unistd.h>
#include <ifaddrs.h>
#endif
// Include the right tap device driver for this platform -- add new platforms here
#ifdef ZT_SERVICE_NETCON
// In network containers builds, use the virtual netcon endpoint instead of a tun/tap port driver
#include "../netcon/NetconEthernetTap.hpp"
namespace ZeroTier { typedef NetconEthernetTap EthernetTap; }
#else // not ZT_SERVICE_NETCON so pick a tap driver
#ifdef __APPLE__
#include "../osdep/OSXEthernetTap.hpp"
namespace ZeroTier { typedef OSXEthernetTap EthernetTap; }
#endif // __APPLE__
#ifdef __LINUX__
#include "../osdep/LinuxEthernetTap.hpp"
namespace ZeroTier { typedef LinuxEthernetTap EthernetTap; }
#endif // __LINUX__
#ifdef __WINDOWS__
#include "../osdep/WindowsEthernetTap.hpp"
namespace ZeroTier { typedef WindowsEthernetTap EthernetTap; }
#endif // __WINDOWS__
#ifdef __FreeBSD__
#include "../osdep/BSDEthernetTap.hpp"
namespace ZeroTier { typedef BSDEthernetTap EthernetTap; }
#endif // __FreeBSD__
#endif // ZT_SERVICE_NETCON
// Sanity limits for HTTP
#define ZT_MAX_HTTP_MESSAGE_SIZE (1024 * 1024 * 64)
#define ZT_MAX_HTTP_CONNECTIONS 64
// 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
// Path under ZT1 home for controller database if controller is enabled
#define ZT_CONTROLLER_DB_PATH "controller.db"
// TCP fallback relay host -- geo-distributed using Amazon Route53 geo-aware DNS
#define ZT_TCP_FALLBACK_RELAY "tcp-fallback.zerotier.com"
#define ZT_TCP_FALLBACK_RELAY_PORT 443
// 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
namespace ZeroTier {
namespace {
#ifdef ZT_AUTO_UPDATE
#define ZT_AUTO_UPDATE_MAX_HTTP_RESPONSE_SIZE (1024 * 1024 * 64)
#define ZT_AUTO_UPDATE_CHECK_PERIOD 21600000
class BackgroundSoftwareUpdateChecker
{
public:
bool isValidSigningIdentity(const Identity &id)
{
return (
/* 0001 - 0004 : obsolete, used in old versions */
/* 0005 */ (id == Identity("ba57ea350e:0:9d4be6d7f86c5660d5ee1951a3d759aa6e12a84fc0c0b74639500f1dbc1a8c566622e7d1c531967ebceb1e9d1761342f88324a8ba520c93c35f92f35080fa23f"))
/* 0006 */ ||(id == Identity("5067b21b83:0:8af477730f5055c48135b84bed6720a35bca4c0e34be4060a4c636288b1ec22217eb22709d610c66ed464c643130c51411bbb0294eef12fbe8ecc1a1e2c63a7a"))
/* 0007 */ ||(id == Identity("4f5e97a8f1:0:57880d056d7baeb04bbc057d6f16e6cb41388570e87f01492fce882485f65a798648595610a3ad49885604e7fb1db2dd3c2c534b75e42c3c0b110ad07b4bb138"))
/* 0008 */ ||(id == Identity("580bbb8e15:0:ad5ef31155bebc6bc413991992387e083fed26d699997ef76e7c947781edd47d1997161fa56ba337b1a2b44b129fd7c7197ce5185382f06011bc88d1363b4ddd"))
);
}
void doUpdateCheck()
{
std::string url(OneService::autoUpdateUrl());
if ((url.length() <= 7)||(url.substr(0,7) != "http://"))
return;
std::string httpHost;
std::string httpPath;
{
std::size_t slashIdx = url.substr(7).find_first_of('/');
if (slashIdx == std::string::npos) {
httpHost = url.substr(7);
httpPath = "/";
} else {
httpHost = url.substr(7,slashIdx);
httpPath = url.substr(slashIdx + 7);
}
}
if (httpHost.length() == 0)
return;
std::vector<InetAddress> ips(OSUtils::resolve(httpHost.c_str()));
for(std::vector<InetAddress>::iterator ip(ips.begin());ip!=ips.end();++ip) {
if (!ip->port())
ip->setPort(80);
std::string nfoPath = httpPath + "LATEST.nfo";
std::map<std::string,std::string> requestHeaders,responseHeaders;
std::string body;
requestHeaders["Host"] = httpHost;
unsigned int scode = Http::GET(ZT_AUTO_UPDATE_MAX_HTTP_RESPONSE_SIZE,60000,reinterpret_cast<const struct sockaddr *>(&(*ip)),nfoPath.c_str(),requestHeaders,responseHeaders,body);
//fprintf(stderr,"UPDATE %s %s %u %lu\n",ip->toString().c_str(),nfoPath.c_str(),scode,body.length());
if ((scode == 200)&&(body.length() > 0)) {
/* NFO fields:
*
* file=<filename>
* signedBy=<signing identity>
* ed25519=<ed25519 ECC signature of archive in hex>
* vMajor=<major version>
* vMinor=<minor version>
* vRevision=<revision> */
Dictionary<4096> nfo(body.c_str());
char tmp[2048];
if (nfo.get("vMajor",tmp,sizeof(tmp)) <= 0) return;
const unsigned int vMajor = Utils::strToUInt(tmp);
if (nfo.get("vMinor",tmp,sizeof(tmp)) <= 0) return;
const unsigned int vMinor = Utils::strToUInt(tmp);
if (nfo.get("vRevision",tmp,sizeof(tmp)) <= 0) return;
const unsigned int vRevision = Utils::strToUInt(tmp);
if (Utils::compareVersion(vMajor,vMinor,vRevision,ZEROTIER_ONE_VERSION_MAJOR,ZEROTIER_ONE_VERSION_MINOR,ZEROTIER_ONE_VERSION_REVISION) <= 0) {
//fprintf(stderr,"UPDATE %u.%u.%u is not newer than our version\n",vMajor,vMinor,vRevision);
return;
}
if (nfo.get("signedBy",tmp,sizeof(tmp)) <= 0) return;
Identity signedBy;
if ((!signedBy.fromString(tmp))||(!isValidSigningIdentity(signedBy))) {
//fprintf(stderr,"UPDATE invalid signedBy or not authorized signing identity.\n");
return;
}
if (nfo.get("file",tmp,sizeof(tmp)) <= 0) return;
std::string filePath(tmp);
if ((!filePath.length())||(filePath.find("..") != std::string::npos))
return;
filePath = httpPath + filePath;
std::string fileData;
if (Http::GET(ZT_AUTO_UPDATE_MAX_HTTP_RESPONSE_SIZE,60000,reinterpret_cast<const struct sockaddr *>(&(*ip)),filePath.c_str(),requestHeaders,responseHeaders,fileData) != 200) {
//fprintf(stderr,"UPDATE GET %s failed\n",filePath.c_str());
return;
}
if (nfo.get("ed25519",tmp,sizeof(tmp)) <= 0) return;
std::string ed25519(Utils::unhex(tmp));
if ((ed25519.length() == 0)||(!signedBy.verify(fileData.data(),(unsigned int)fileData.length(),ed25519.data(),(unsigned int)ed25519.length()))) {
//fprintf(stderr,"UPDATE %s failed signature check!\n",filePath.c_str());
return;
}
/* --------------------------------------------------------------- */
/* We made it! Begin OS-specific installation code. */
#ifdef __APPLE__
/* OSX version is in the form of a MacOSX .pkg file, so we will
* launch installer (normally in /usr/sbin) to install it. It will
* then turn around and shut down the service, update files, and
* relaunch. */
{
char bashp[128],pkgp[128];
Utils::snprintf(bashp,sizeof(bashp),"/tmp/ZeroTierOne-update-%u.%u.%u.sh",vMajor,vMinor,vRevision);
Utils::snprintf(pkgp,sizeof(pkgp),"/tmp/ZeroTierOne-update-%u.%u.%u.pkg",vMajor,vMinor,vRevision);
FILE *pkg = fopen(pkgp,"w");
if ((!pkg)||(fwrite(fileData.data(),fileData.length(),1,pkg) != 1)) {
fclose(pkg);
unlink(bashp);
unlink(pkgp);
fprintf(stderr,"UPDATE error writing %s\n",pkgp);
return;
}
fclose(pkg);
FILE *bash = fopen(bashp,"w");
if (!bash) {
fclose(pkg);
unlink(bashp);
unlink(pkgp);
fprintf(stderr,"UPDATE error writing %s\n",bashp);
return;
}
fprintf(bash,
"#!/bin/bash\n"
"export PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/sbin\n"
"sleep 1\n"
"installer -pkg \"%s\" -target /\n"
"sleep 1\n"
"rm -f \"%s\" \"%s\"\n"
"exit 0\n",
pkgp,
pkgp,
bashp);
fclose(bash);
long pid = (long)vfork();
if (pid == 0) {
setsid(); // detach from parent so that shell isn't killed when parent is killed
signal(SIGHUP,SIG_IGN);
signal(SIGTERM,SIG_IGN);
signal(SIGQUIT,SIG_IGN);
execl("/bin/bash","/bin/bash",bashp,(char *)0);
exit(0);
}
}
#endif // __APPLE__
#ifdef __WINDOWS__
/* Windows version comes in the form of .MSI package that
* takes care of everything. */
{
char tempp[512],batp[512],msip[512],cmdline[512];
if (GetTempPathA(sizeof(tempp),tempp) <= 0)
return;
CreateDirectoryA(tempp,(LPSECURITY_ATTRIBUTES)0);
Utils::snprintf(batp,sizeof(batp),"%s\\ZeroTierOne-update-%u.%u.%u.bat",tempp,vMajor,vMinor,vRevision);
Utils::snprintf(msip,sizeof(msip),"%s\\ZeroTierOne-update-%u.%u.%u.msi",tempp,vMajor,vMinor,vRevision);
FILE *msi = fopen(msip,"wb");
if ((!msi)||(fwrite(fileData.data(),(size_t)fileData.length(),1,msi) != 1)) {
fclose(msi);
return;
}
fclose(msi);
FILE *bat = fopen(batp,"wb");
if (!bat)
return;
fprintf(bat,
"TIMEOUT.EXE /T 1 /NOBREAK\r\n"
"NET.EXE STOP \"ZeroTierOneService\"\r\n"
"TIMEOUT.EXE /T 1 /NOBREAK\r\n"
"MSIEXEC.EXE /i \"%s\" /qn\r\n"
"TIMEOUT.EXE /T 1 /NOBREAK\r\n"
"NET.EXE START \"ZeroTierOneService\"\r\n"
"DEL \"%s\"\r\n"
"DEL \"%s\"\r\n",
msip,
msip,
batp);
fclose(bat);
STARTUPINFOA si;
PROCESS_INFORMATION pi;
memset(&si,0,sizeof(si));
memset(&pi,0,sizeof(pi));
Utils::snprintf(cmdline,sizeof(cmdline),"CMD.EXE /c \"%s\"",batp);
CreateProcessA(NULL,cmdline,NULL,NULL,FALSE,CREATE_NO_WINDOW|CREATE_NEW_PROCESS_GROUP,NULL,NULL,&si,&pi);
}
#endif // __WINDOWS__
/* --------------------------------------------------------------- */
return;
} // else try to fetch from next IP address
}
}
void threadMain()
throw()
{
try {
this->doUpdateCheck();
} catch ( ... ) {}
}
};
static BackgroundSoftwareUpdateChecker backgroundSoftwareUpdateChecker;
#endif // ZT_AUTO_UPDATE
static bool isBlacklistedLocalInterfaceForZeroTierTraffic(const char *ifn)
{
#if defined(__linux__) || defined(linux) || defined(__LINUX__) || defined(__linux)
if ((ifn[0] == 'l')&&(ifn[1] == 'o')) return true; // loopback
if ((ifn[0] == 'z')&&(ifn[1] == 't')) return true; // sanity check: zt#
if ((ifn[0] == 't')&&(ifn[1] == 'u')&&(ifn[2] == 'n')) return true; // tun# is probably an OpenVPN tunnel or similar
if ((ifn[0] == 't')&&(ifn[1] == 'a')&&(ifn[2] == 'p')) return true; // tap# is probably an OpenVPN tunnel or similar
#endif
#ifdef __APPLE__
if ((ifn[0] == 'l')&&(ifn[1] == 'o')) return true; // loopback
if ((ifn[0] == 'z')&&(ifn[1] == 't')) return true; // sanity check: zt#
if ((ifn[0] == 't')&&(ifn[1] == 'u')&&(ifn[2] == 'n')) return true; // tun# is probably an OpenVPN tunnel or similar
if ((ifn[0] == 't')&&(ifn[1] == 'a')&&(ifn[2] == 'p')) return true; // tap# is probably an OpenVPN tunnel or similar
if ((ifn[0] == 'u')&&(ifn[1] == 't')&&(ifn[2] == 'u')&&(ifn[3] == 'n')) return true; // ... as is utun#
#endif
return false;
}
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);
}
class OneServiceImpl;
static int SnodeVirtualNetworkConfigFunction(ZT_Node *node,void *uptr,uint64_t nwid,void **nuptr,enum ZT_VirtualNetworkConfigOperation op,const ZT_VirtualNetworkConfig *nwconf);
static void SnodeEventCallback(ZT_Node *node,void *uptr,enum ZT_Event event,const void *metaData);
static long SnodeDataStoreGetFunction(ZT_Node *node,void *uptr,const char *name,void *buf,unsigned long bufSize,unsigned long readIndex,unsigned long *totalSize);
static int SnodeDataStorePutFunction(ZT_Node *node,void *uptr,const char *name,const void *data,unsigned long len,int secure);
static int SnodeWirePacketSendFunction(ZT_Node *node,void *uptr,const struct sockaddr_storage *localAddr,const struct sockaddr_storage *addr,const void *data,unsigned int len,unsigned int ttl);
static void SnodeVirtualNetworkFrameFunction(ZT_Node *node,void *uptr,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,const struct sockaddr_storage *localAddr,const struct sockaddr_storage *remoteAddr);
#ifdef ZT_ENABLE_CLUSTER
static void SclusterSendFunction(void *uptr,unsigned int toMemberId,const void *data,unsigned int len);
static int SclusterGeoIpFunction(void *uptr,const struct sockaddr_storage *addr,int *x,int *y,int *z);
#endif
static void StapFrameHandler(void *uptr,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
struct TcpConnection
{
enum {
TCP_HTTP_INCOMING,
TCP_HTTP_OUTGOING, // not currently used
TCP_TUNNEL_OUTGOING // fale-SSL outgoing tunnel -- HTTP-related fields are not used
} type;
bool shouldKeepAlive;
OneServiceImpl *parent;
PhySocket *sock;
InetAddress from;
http_parser parser;
unsigned long messageSize;
uint64_t lastActivity;
std::string currentHeaderField;
std::string currentHeaderValue;
std::string url;
std::string status;
std::map< std::string,std::string > headers;
std::string body;
std::string writeBuf;
Mutex writeBuf_m;
};
// Used to pseudo-randomize local source port picking
static volatile unsigned int _udpPortPickerCounter = 0;
class OneServiceImpl : public OneService
{
public:
// begin member variables --------------------------------------------------
const std::string _homePath;
BackgroundResolver _tcpFallbackResolver;
#ifdef ZT_ENABLE_NETWORK_CONTROLLER
SqliteNetworkController *_controller;
#endif
Phy<OneServiceImpl *> _phy;
Node *_node;
/*
* 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 dervied 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.
*/
Binder _bindings[3];
unsigned int _ports[3];
uint16_t _portsBE[3]; // ports in big-endian network byte order as in sockaddr
// Sockets for JSON API -- bound only to V4 and V6 localhost
PhySocket *_v4TcpControlSocket;
PhySocket *_v6TcpControlSocket;
// JSON API handler
ControlPlane *_controlPlane;
// 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 uint64_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;
}
EthernetTap *tap;
ZT_VirtualNetworkConfig config; // memcpy() of raw config from core
std::vector<InetAddress> managedIps;
std::list<ManagedRoute> managedRoutes;
NetworkSettings settings;
};
std::map<uint64_t,NetworkState> _nets;
Mutex _nets_m;
// Active TCP/IP connections
std::set< TcpConnection * > _tcpConnections; // no mutex for this since it's done in the main loop thread only
TcpConnection *_tcpFallbackTunnel;
// Termination status information
ReasonForTermination _termReason;
std::string _fatalErrorMessage;
Mutex _termReason_m;
// uPnP/NAT-PMP port mapper if enabled
#ifdef ZT_USE_MINIUPNPC
PortMapper *_portMapper;
#endif
// Cluster management instance if enabled
#ifdef ZT_ENABLE_CLUSTER
PhySocket *_clusterMessageSocket;
ClusterDefinition *_clusterDefinition;
unsigned int _clusterMemberId;
#endif
// Set to false to force service to stop
volatile bool _run;
Mutex _run_m;
// end member variables ----------------------------------------------------
OneServiceImpl(const char *hp,unsigned int port) :
_homePath((hp) ? hp : ".")
,_tcpFallbackResolver(ZT_TCP_FALLBACK_RELAY)
#ifdef ZT_ENABLE_NETWORK_CONTROLLER
,_controller((SqliteNetworkController *)0)
#endif
,_phy(this,false,true)
,_node((Node *)0)
,_controlPlane((ControlPlane *)0)
,_lastDirectReceiveFromGlobal(0)
#ifdef ZT_TCP_FALLBACK_RELAY
,_lastSendToGlobalV4(0)
#endif
,_lastRestart(0)
,_nextBackgroundTaskDeadline(0)
,_tcpFallbackTunnel((TcpConnection *)0)
,_termReason(ONE_STILL_RUNNING)
#ifdef ZT_USE_MINIUPNPC
,_portMapper((PortMapper *)0)
#endif
#ifdef ZT_ENABLE_CLUSTER
,_clusterMessageSocket((PhySocket *)0)
,_clusterDefinition((ClusterDefinition *)0)
,_clusterMemberId(0)
#endif
,_run(true)
{
_ports[0] = 0;
_ports[1] = 0;
_ports[2] = 0;
// The control socket is bound to the default/static port on localhost. If we
// can do this, we have successfully allocated a port. The binders will take
// care of binding non-local addresses for ZeroTier traffic.
const int portTrials = (port == 0) ? 256 : 1; // if port is 0, pick random
for(int k=0;k<portTrials;++k) {
if (port == 0) {
unsigned int randp = 0;
Utils::getSecureRandom(&randp,sizeof(randp));
port = 20000 + (randp % 45500);
}
if (_trialBind(port)) {
struct sockaddr_in in4;
memset(&in4,0,sizeof(in4));
in4.sin_family = AF_INET;
in4.sin_addr.s_addr = Utils::hton((uint32_t)0x7f000001); // right now we just listen for TCP @127.0.0.1
in4.sin_port = Utils::hton((uint16_t)port);
_v4TcpControlSocket = _phy.tcpListen((const struct sockaddr *)&in4,this);
struct sockaddr_in6 in6;
memset((void *)&in6,0,sizeof(in6));
in6.sin6_family = AF_INET6;
in6.sin6_port = in4.sin_port;
in6.sin6_addr.s6_addr[15] = 1; // IPv6 localhost == ::1
_v6TcpControlSocket = _phy.tcpListen((const struct sockaddr *)&in6,this);
// We must bind one of IPv4 or IPv6 -- support either failing to support hosts that
// have only IPv4 or only IPv6 stacks.
if ((_v4TcpControlSocket)||(_v6TcpControlSocket)) {
_ports[0] = port;
break;
} else {
if (_v4TcpControlSocket)
_phy.close(_v4TcpControlSocket,false);
if (_v6TcpControlSocket)
_phy.close(_v6TcpControlSocket,false);
port = 0;
}
} else {
port = 0;
}
}
if (_ports[0] == 0)
throw std::runtime_error("cannot bind to local control interface port");
char portstr[64];
Utils::snprintf(portstr,sizeof(portstr),"%u",_ports[0]);
OSUtils::writeFile((_homePath + ZT_PATH_SEPARATOR_S + "zerotier-one.port").c_str(),std::string(portstr));
}
virtual ~OneServiceImpl()
{
for(int i=0;i<3;++i)
_bindings[i].closeAll(_phy);
_phy.close(_v4TcpControlSocket);
_phy.close(_v6TcpControlSocket);
#ifdef ZT_ENABLE_CLUSTER
_phy.close(_clusterMessageSocket);
#endif
#ifdef ZT_USE_MINIUPNPC
delete _portMapper;
#endif
#ifdef ZT_ENABLE_NETWORK_CONTROLLER
delete _controller;
#endif
#ifdef ZT_ENABLE_CLUSTER
delete _clusterDefinition;
#endif
}
virtual ReasonForTermination run()
{
try {
std::string authToken;
{
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);
_node = new Node(
OSUtils::now(),
this,
SnodeDataStoreGetFunction,
SnodeDataStorePutFunction,
SnodeWirePacketSendFunction,
SnodeVirtualNetworkFrameFunction,
SnodeVirtualNetworkConfigFunction,
SnodePathCheckFunction,
SnodeEventCallback);
// 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.
_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 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]) {
_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];
Utils::snprintf(uniqueName,sizeof(uniqueName),"ZeroTier/%.10llx@%u",_node->address(),_ports[2]);
_portMapper = new PortMapper(_ports[2],uniqueName);
}
}
#endif
for(int i=0;i<3;++i)
_portsBE[i] = Utils::hton((uint16_t)_ports[i]);
{
FILE *trustpaths = fopen((_homePath + ZT_PATH_SEPARATOR_S + "trustedpaths").c_str(),"r");
uint64_t ids[ZT_MAX_TRUSTED_PATHS];
InetAddress addresses[ZT_MAX_TRUSTED_PATHS];
if (trustpaths) {
char buf[1024];
unsigned int count = 0;
while ((fgets(buf,sizeof(buf),trustpaths))&&(count < ZT_MAX_TRUSTED_PATHS)) {
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.ipScope() != InetAddress::IP_SCOPE_GLOBAL) && (trustedPathNetwork.netmaskBits() > 0) ) {
ids[count] = trustedPathId;
addresses[count] = trustedPathNetwork;
++count;
}
}
fclose(trustpaths);
if (count)
_node->setTrustedPaths(reinterpret_cast<const struct sockaddr_storage *>(addresses),ids,count);
}
}
#ifdef ZT_ENABLE_NETWORK_CONTROLLER
_controller = new SqliteNetworkController(_node,(_homePath + ZT_PATH_SEPARATOR_S + ZT_CONTROLLER_DB_PATH).c_str(),(_homePath + ZT_PATH_SEPARATOR_S + "circuitTestResults.d").c_str());
_node->setNetconfMaster((void *)_controller);
#endif
#ifdef ZT_ENABLE_CLUSTER
if (OSUtils::fileExists((_homePath + ZT_PATH_SEPARATOR_S + "cluster").c_str())) {
_clusterDefinition = new ClusterDefinition(_node->address(),(_homePath + ZT_PATH_SEPARATOR_S + "cluster").c_str());
if (_clusterDefinition->size() > 0) {
std::vector<ClusterDefinition::MemberDefinition> members(_clusterDefinition->members());
for(std::vector<ClusterDefinition::MemberDefinition>::iterator m(members.begin());m!=members.end();++m) {
PhySocket *cs = _phy.udpBind(reinterpret_cast<const struct sockaddr *>(&(m->clusterEndpoint)));
if (cs) {
if (_clusterMessageSocket) {
_phy.close(_clusterMessageSocket,false);
_phy.close(cs,false);
Mutex::Lock _l(_termReason_m);
_termReason = ONE_UNRECOVERABLE_ERROR;
_fatalErrorMessage = "Cluster: can't determine my cluster member ID: able to bind more than one cluster message socket IP/port!";
return _termReason;
}
_clusterMessageSocket = cs;
_clusterMemberId = m->id;
}
}
if (!_clusterMessageSocket) {
Mutex::Lock _l(_termReason_m);
_termReason = ONE_UNRECOVERABLE_ERROR;
_fatalErrorMessage = "Cluster: can't determine my cluster member ID: unable to bind to any cluster message socket IP/port.";
return _termReason;
}
const ClusterDefinition::MemberDefinition &me = (*_clusterDefinition)[_clusterMemberId];
InetAddress endpoints[255];
unsigned int numEndpoints = 0;
for(std::vector<InetAddress>::const_iterator i(me.zeroTierEndpoints.begin());i!=me.zeroTierEndpoints.end();++i)
endpoints[numEndpoints++] = *i;
if (_node->clusterInit(_clusterMemberId,reinterpret_cast<const struct sockaddr_storage *>(endpoints),numEndpoints,me.x,me.y,me.z,&SclusterSendFunction,this,_clusterDefinition->geo().available() ? &SclusterGeoIpFunction : 0,this) == ZT_RESULT_OK) {
std::vector<ClusterDefinition::MemberDefinition> members(_clusterDefinition->members());
for(std::vector<ClusterDefinition::MemberDefinition>::iterator m(members.begin());m!=members.end();++m) {
if (m->id != _clusterMemberId)
_node->clusterAddMember(m->id);
}
}
} else {
delete _clusterDefinition;
_clusterDefinition = (ClusterDefinition *)0;
}
}
#endif
_controlPlane = new ControlPlane(this,_node,(_homePath + ZT_PATH_SEPARATOR_S + "ui").c_str());
_controlPlane->addAuthToken(authToken.c_str());
#ifdef ZT_ENABLE_NETWORK_CONTROLLER
_controlPlane->setController(_controller);
#endif
{ // Remember networks from previous session
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);
}
}
// Start two background threads to handle expensive ops out of line
Thread::start(_node);
Thread::start(_node);
_nextBackgroundTaskDeadline = 0;
uint64_t clockShouldBe = OSUtils::now();
_lastRestart = clockShouldBe;
uint64_t lastTapMulticastGroupCheck = 0;
uint64_t lastTcpFallbackResolve = 0;
uint64_t lastBindRefresh = 0;
uint64_t lastLocalInterfaceAddressCheck = (OSUtils::now() - ZT_LOCAL_INTERFACE_CHECK_INTERVAL) + 15000; // do this in 15s to give portmapper time to configure and other things time to settle
#ifdef ZT_AUTO_UPDATE
uint64_t lastSoftwareUpdateCheck = 0;
#endif // ZT_AUTO_UPDATE
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 uint64_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;
}
// 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) >= ZT_BINDER_REFRESH_PERIOD)||(restarted)) {
lastBindRefresh = now;
for(int i=0;i<3;++i) {
if (_ports[i]) {
_bindings[i].refresh(_phy,_ports[i],*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);
}
}
}
uint64_t dl = _nextBackgroundTaskDeadline;
if (dl <= now) {
_node->processBackgroundTasks(now,&_nextBackgroundTaskDeadline);
dl = _nextBackgroundTaskDeadline;
}
#ifdef ZT_AUTO_UPDATE
if ((now - lastSoftwareUpdateCheck) >= ZT_AUTO_UPDATE_CHECK_PERIOD) {
lastSoftwareUpdateCheck = now;
Thread::start(&backgroundSoftwareUpdateChecker);
}
#endif // ZT_AUTO_UPDATE
if ((now - lastTcpFallbackResolve) >= ZT_TCP_FALLBACK_RERESOLVE_DELAY) {
lastTcpFallbackResolve = now;
_tcpFallbackResolver.resolveNow();
}
if ((_tcpFallbackTunnel)&&((now - _lastDirectReceiveFromGlobal) < (ZT_TCP_FALLBACK_AFTER / 2)))
_phy.close(_tcpFallbackTunnel->sock);
if ((now - lastTapMulticastGroupCheck) >= ZT_TAP_CHECK_MULTICAST_INTERVAL) {
lastTapMulticastGroupCheck = now;
Mutex::Lock _l(_nets_m);
for(std::map<uint64_t,NetworkState>::const_iterator n(_nets.begin());n!=_nets.end();++n) {
if (n->second.tap) {
std::vector<MulticastGroup> added,removed;
n->second.tap->scanMulticastGroups(added,removed);
for(std::vector<MulticastGroup>::iterator m(added.begin());m!=added.end();++m)
_node->multicastSubscribe(n->first,m->mac().toInt(),m->adi());
for(std::vector<MulticastGroup>::iterator m(removed.begin());m!=removed.end();++m)
_node->multicastUnsubscribe(n->first,m->mac().toInt(),m->adi());
}
}
}
if ((now - lastLocalInterfaceAddressCheck) >= 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(_bindings[0].allBoundLocalInterfaceAddresses());
for(std::vector<InetAddress>::const_iterator i(boundAddrs.begin());i!=boundAddrs.end();++i)
_node->addLocalInterfaceAddress(reinterpret_cast<const struct sockaddr_storage *>(&(*i)));
}
const unsigned long delay = (dl > now) ? (unsigned long)(dl - now) : 100;
clockShouldBe = now + (uint64_t)delay;
_phy.poll(delay);
}
} catch (std::exception &exc) {
Mutex::Lock _l(_termReason_m);
_termReason = ONE_UNRECOVERABLE_ERROR;
_fatalErrorMessage = exc.what();
} catch ( ... ) {
Mutex::Lock _l(_termReason_m);
_termReason = ONE_UNRECOVERABLE_ERROR;
_fatalErrorMessage = "unexpected exception in main thread";
}
try {
while (!_tcpConnections.empty())
_phy.close((*_tcpConnections.begin())->sock);
} catch ( ... ) {}
{
Mutex::Lock _l(_nets_m);
for(std::map<uint64_t,NetworkState>::iterator n(_nets.begin());n!=_nets.end();++n)
delete n->second.tap;
_nets.clear();
}
delete _controlPlane;
_controlPlane = (ControlPlane *)0;
delete _node;
_node = (Node *)0;