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ZeroTierOne/service/OneService.cpp
Adam Ierymenko 27f1155f1b docs and API stuff
2016-11-23 15:53:53 -08:00

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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"
#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"
#ifdef ZT_USE_SYSTEM_HTTP_PARSER
#include <http_parser.h>
#else
#include "../ext/http-parser/http_parser.h"
#endif
#include "../ext/json/json.hpp"
using json = nlohmann::json;
/**
* 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
#include "../controller/EmbeddedNetworkController.hpp"
#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.d"
// 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 {
static uint64_t _jI(const json &jv,const uint64_t dfl)
{
if (jv.is_number()) {
return (uint64_t)jv;
} else if (jv.is_string()) {
std::string s = jv;
return Utils::strToU64(s.c_str());
} else if (jv.is_boolean()) {
return ((bool)jv ? 1ULL : 0ULL);
}
return dfl;
}
static bool _jB(const json &jv,const bool dfl)
{
if (jv.is_boolean()) {
return (bool)jv;
} else if (jv.is_number()) {
return ((uint64_t)jv > 0ULL);
} else if (jv.is_string()) {
std::string s = jv;
if (s.length() > 0) {
switch(s[0]) {
case 't':
case 'T':
case '1':
return true;
}
}
return false;
}
return dfl;
}
static std::string _jS(const json &jv,const char *dfl)
{
if (jv.is_string()) {
return jv;
} else if (jv.is_number()) {
char tmp[64];
Utils::snprintf(tmp,sizeof(tmp),"%llu",(uint64_t)jv);
return tmp;
} else if (jv.is_boolean()) {
return ((bool)jv ? std::string("1") : std::string("0"));
}
return std::string((dfl) ? dfl : "");
}
#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,uint64_t ztaddr,const struct sockaddr_storage *localAddr,const struct sockaddr_storage *remoteAddr);
static int SnodePathLookupFunction(ZT_Node *node,void *uptr,uint64_t ztaddr,int family,struct sockaddr_storage *result);
#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;
InetAddress _allowManagementFrom;
EmbeddedNetworkController *_controller;
Phy<OneServiceImpl *> _phy;
Node *_node;
// Local configuration and memo-ized static path definitions
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;
Mutex _localConfig_m;
/*
* 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< SharedPtr<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,const char *allowManagementFrom) :
_homePath((hp) ? hp : ".")
,_tcpFallbackResolver(ZT_TCP_FALLBACK_RELAY)
,_controller((EmbeddedNetworkController *)0)
,_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)
{
if (allowManagementFrom)
_allowManagementFrom.fromString(allowManagementFrom);
_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)((allowManagementFrom) ? 0 : 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;
if (!allowManagementFrom)
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
delete _controller;
#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);
// Clean up any legacy files if present
OSUtils::rm((_homePath + ZT_PATH_SEPARATOR_S + "peers.save").c_str());
{
struct ZT_Node_Callbacks cb;
cb.version = 0;
cb.dataStoreGetFunction = SnodeDataStoreGetFunction;
cb.dataStorePutFunction = SnodeDataStorePutFunction;
cb.wirePacketSendFunction = SnodeWirePacketSendFunction;
cb.virtualNetworkFrameFunction = SnodeVirtualNetworkFrameFunction;
cb.virtualNetworkConfigFunction = SnodeVirtualNetworkConfigFunction;
cb.eventCallback = SnodeEventCallback;
cb.pathCheckFunction = SnodePathCheckFunction;
cb.pathLookupFunction = SnodePathLookupFunction;
_node = new Node(this,&cb,OSUtils::now());
}
// 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]);
{
uint64_t trustedPathIds[ZT_MAX_TRUSTED_PATHS];
InetAddress trustedPathNetworks[ZT_MAX_TRUSTED_PATHS];
unsigned int trustedPathCount = 0;
// Old style "trustedpaths" flat file -- will eventually go away
FILE *trustpaths = fopen((_homePath + ZT_PATH_SEPARATOR_S + "trustedpaths").c_str(),"r");
if (trustpaths) {
char buf[1024];
while ((fgets(buf,sizeof(buf),trustpaths))&&(trustedPathCount < 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) ) {
trustedPathIds[trustedPathCount] = trustedPathId;
trustedPathNetworks[trustedPathCount] = trustedPathNetwork;
++trustedPathCount;
}
}
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)) {
try {
_localConfig = json::parse(lcbuf);
if (!_localConfig.is_object()) {
fprintf(stderr,"WARNING: unable to parse local.conf (root element is not a JSON object)" ZT_EOL_S);
}
} catch ( ... ) {
fprintf(stderr,"WARNING: unable to parse local.conf (invalid JSON)" ZT_EOL_S);
}
}
// Get any trusted paths in local.conf (we'll parse the rest of physical[] elsewhere)
json &physical = _localConfig["physical"];
if (physical.is_object()) {
for(json::iterator phy(physical.begin());phy!=physical.end();++phy) {
InetAddress net(_jS(phy.key(),""));
if (net) {
if (phy.value().is_object()) {
uint64_t tpid;
if ((tpid = _jI(phy.value()["trustedPathId"],0ULL)) != 0ULL) {
if ( ((net.ss_family == AF_INET)||(net.ss_family == AF_INET6)) && (trustedPathCount < ZT_MAX_TRUSTED_PATHS) && (net.ipScope() != InetAddress::IP_SCOPE_GLOBAL) && (net.netmaskBits() > 0) ) {
trustedPathIds[trustedPathCount] = tpid;
trustedPathNetworks[trustedPathCount] = net;
++trustedPathCount;
}
}
}
}
}
}
// Set trusted paths if there are any
if (trustedPathCount)
_node->setTrustedPaths(reinterpret_cast<const struct sockaddr_storage *>(trustedPathNetworks),trustedPathIds,trustedPathCount);
}
applyLocalConfig();
_controller = new EmbeddedNetworkController(_node,(_homePath + ZT_PATH_SEPARATOR_S + ZT_CONTROLLER_DB_PATH).c_str());
_node->setNetconfMaster((void *)_controller);
#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());
_controlPlane->setController(_controller);
{ // 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);
}
}
_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;
return _termReason;
}
virtual ReasonForTermination reasonForTermination() const
{
Mutex::Lock _l(_termReason_m);
return _termReason;
}
virtual std::string fatalErrorMessage() const
{
Mutex::Lock _l(_termReason_m);
return _fatalErrorMessage;
}
virtual std::string portDeviceName(uint64_t nwid) const
{
Mutex::Lock _l(_nets_m);
std::map<uint64_t,NetworkState>::const_iterator n(_nets.find(nwid));
if ((n != _nets.end())&&(n->second.tap))
return n->second.tap->deviceName();
else return std::string();
}
virtual bool tcpFallbackActive() const
{
return (_tcpFallbackTunnel != (TcpConnection *)0);
}
virtual void terminate()
{
_run_m.lock();
_run = false;
_run_m.unlock();
_phy.whack();
}
virtual bool getNetworkSettings(const uint64_t nwid,NetworkSettings &settings) const
{
Mutex::Lock _l(_nets_m);
std::map<uint64_t,NetworkState>::const_iterator n(_nets.find(nwid));
if (n == _nets.end())
return false;
memcpy(&settings,&(n->second.settings),sizeof(NetworkSettings));
return true;
}
virtual bool setNetworkSettings(const uint64_t nwid,const NetworkSettings &settings)
{
Mutex::Lock _l(_nets_m);
std::map<uint64_t,NetworkState>::iterator n(_nets.find(nwid));
if (n == _nets.end())
return false;
memcpy(&(n->second.settings),&settings,sizeof(NetworkSettings));
char nlcpath[256];
Utils::snprintf(nlcpath,sizeof(nlcpath),"%s" ZT_PATH_SEPARATOR_S "networks.d" ZT_PATH_SEPARATOR_S "%.16llx.local.conf",_homePath.c_str(),nwid);
FILE *out = fopen(nlcpath,"w");
if (out) {
fprintf(out,"allowManaged=%d\n",(int)n->second.settings.allowManaged);
fprintf(out,"allowGlobal=%d\n",(int)n->second.settings.allowGlobal);
fprintf(out,"allowDefault=%d\n",(int)n->second.settings.allowDefault);
fclose(out);
}
if (n->second.tap)
syncManagedStuff(n->second,true,true);
return true;
}
// Internal implementation methods -----------------------------------------
// Must be called after _localConfig is read or modified
void applyLocalConfig()
{
Mutex::Lock _l(_localConfig_m);
_v4Hints.clear();
_v6Hints.clear();
_v4Blacklists.clear();
_v6Blacklists.clear();
json &virt = _localConfig["virtual"];
if (virt.is_object()) {
for(json::iterator v(virt.begin());v!=virt.end();++v) {
const std::string nstr = v.key();
if ((nstr.length() == ZT_ADDRESS_LENGTH_HEX)&&(v.value().is_object())) {
const Address ztaddr(nstr.c_str());
if (ztaddr) {
const std::string rstr(_jS(v.value()["role"],""));
_node->setRole(ztaddr.toInt(),((rstr == "upstream")||(rstr == "UPSTREAM")) ? ZT_PEER_ROLE_UPSTREAM : ZT_PEER_ROLE_LEAF);
const uint64_t ztaddr2 = ztaddr.toInt();
std::vector<InetAddress> &v4h = _v4Hints[ztaddr2];
std::vector<InetAddress> &v6h = _v6Hints[ztaddr2];
std::vector<InetAddress> &v4b = _v4Blacklists[ztaddr2];
std::vector<InetAddress> &v6b = _v6Blacklists[ztaddr2];
json &tryAddrs = v.value()["try"];
if (tryAddrs.is_array()) {
for(unsigned long i=0;i<tryAddrs.size();++i) {
const InetAddress ip(_jS(tryAddrs[i],""));
if (ip.ss_family == AF_INET)
v4h.push_back(ip);
else if (ip.ss_family == AF_INET6)
v6h.push_back(ip);
}
}
json &blAddrs = v.value()["blacklist"];
if (blAddrs.is_array()) {
for(unsigned long i=0;i<blAddrs.size();++i) {
const InetAddress ip(_jS(tryAddrs[i],""));
if (ip.ss_family == AF_INET)
v4b.push_back(ip);
else if (ip.ss_family == AF_INET6)
v6b.push_back(ip);
}
}
if (v4h.empty()) _v4Hints.erase(ztaddr2);
if (v6h.empty()) _v6Hints.erase(ztaddr2);
if (v4b.empty()) _v4Blacklists.erase(ztaddr2);
if (v6b.empty()) _v6Blacklists.erase(ztaddr2);
}
}
}
}
_globalV4Blacklist.clear();
_globalV6Blacklist.clear();
json &physical = _localConfig["physical"];
if (physical.is_object()) {
for(json::iterator phy(physical.begin());phy!=physical.end();++phy) {
const InetAddress net(_jS(phy.key(),""));
if ((net)&&(net.netmaskBits() > 0)) {
if (phy.value().is_object()) {
if (_jB(phy.value()["blacklist"],false)) {
if (net.ss_family == AF_INET)
_globalV4Blacklist.push_back(net);
else if (net.ss_family == AF_INET6)
_globalV6Blacklist.push_back(net);
}
}
}
}
}
json &settings = _localConfig["settings"];
if (settings.is_object()) {
const std::string rp(_jS(settings["relayPolicy"],""));
if ((rp == "always")||(rp == "ALWAYS"))
_node->setRelayPolicy(ZT_RELAY_POLICY_ALWAYS);
else if ((rp == "never")||(rp == "NEVER"))
_node->setRelayPolicy(ZT_RELAY_POLICY_NEVER);
else _node->setRelayPolicy(ZT_RELAY_POLICY_TRUSTED);
}
}
// Checks if a managed IP or route target is allowed
bool checkIfManagedIsAllowed(const NetworkState &n,const InetAddress &target)
{
if (!n.settings.allowManaged)
return false;
if (target.isDefaultRoute())
return n.settings.allowDefault;
switch(target.ipScope()) {
case InetAddress::IP_SCOPE_NONE:
case InetAddress::IP_SCOPE_MULTICAST:
case InetAddress::IP_SCOPE_LOOPBACK:
case InetAddress::IP_SCOPE_LINK_LOCAL:
return false;
case InetAddress::IP_SCOPE_GLOBAL:
return n.settings.allowGlobal;
default:
return true;
}
}
// Match only an IP from a vector of IPs -- used in syncManagedStuff()
bool matchIpOnly(const std::vector<InetAddress> &ips,const InetAddress &ip) const
{
for(std::vector<InetAddress>::const_iterator i(ips.begin());i!=ips.end();++i) {
if (i->ipsEqual(ip))
return true;
}
return false;
}
// Apply or update managed IPs for a configured network (be sure n.tap exists)
void syncManagedStuff(NetworkState &n,bool syncIps,bool syncRoutes)
{
// assumes _nets_m is locked
if (syncIps) {
std::vector<InetAddress> newManagedIps;
newManagedIps.reserve(n.config.assignedAddressCount);
for(unsigned int i=0;i<n.config.assignedAddressCount;++i) {
const InetAddress *ii = reinterpret_cast<const InetAddress *>(&(n.config.assignedAddresses[i]));
if (checkIfManagedIsAllowed(n,*ii))
newManagedIps.push_back(*ii);
}
std::sort(newManagedIps.begin(),newManagedIps.end());
newManagedIps.erase(std::unique(newManagedIps.begin(),newManagedIps.end()),newManagedIps.end());
for(std::vector<InetAddress>::iterator ip(n.managedIps.begin());ip!=n.managedIps.end();++ip) {
if (std::find(newManagedIps.begin(),newManagedIps.end(),*ip) == newManagedIps.end()) {
if (!n.tap->removeIp(*ip))
fprintf(stderr,"ERROR: unable to remove ip address %s" ZT_EOL_S, ip->toString().c_str());
}
}
for(std::vector<InetAddress>::iterator ip(newManagedIps.begin());ip!=newManagedIps.end();++ip) {
if (std::find(n.managedIps.begin(),n.managedIps.end(),*ip) == n.managedIps.end()) {
if (!n.tap->addIp(*ip))
fprintf(stderr,"ERROR: unable to add ip address %s" ZT_EOL_S, ip->toString().c_str());
}
}
n.managedIps.swap(newManagedIps);
}
if (syncRoutes) {
char tapdev[64];
#ifdef __WINDOWS__
Utils::snprintf(tapdev,sizeof(tapdev),"%.16llx",(unsigned long long)n.tap->luid().Value);
#else
Utils::scopy(tapdev,sizeof(tapdev),n.tap->deviceName().c_str());
#endif
std::vector<InetAddress> myIps(n.tap->ips());
// Nuke applied routes that are no longer in n.config.routes[] and/or are not allowed
for(std::list< SharedPtr<ManagedRoute> >::iterator mr(n.managedRoutes.begin());mr!=n.managedRoutes.end();) {
bool haveRoute = false;
if ( (checkIfManagedIsAllowed(n,(*mr)->target())) && (((*mr)->via().ss_family != (*mr)->target().ss_family)||(!matchIpOnly(myIps,(*mr)->via()))) ) {
for(unsigned int i=0;i<n.config.routeCount;++i) {
const InetAddress *const target = reinterpret_cast<const InetAddress *>(&(n.config.routes[i].target));
const InetAddress *const via = reinterpret_cast<const InetAddress *>(&(n.config.routes[i].via));
if ( ((*mr)->target() == *target) && ( ((via->ss_family == target->ss_family)&&((*mr)->via().ipsEqual(*via))) || (tapdev == (*mr)->device()) ) ) {
haveRoute = true;
break;
}
}
}
if (haveRoute) {
++mr;
} else {
n.managedRoutes.erase(mr++);
}
}
// Apply routes in n.config.routes[] that we haven't applied yet, and sync those we have in case shadow routes need to change
for(unsigned int i=0;i<n.config.routeCount;++i) {
const InetAddress *const target = reinterpret_cast<const InetAddress *>(&(n.config.routes[i].target));
const InetAddress *const via = reinterpret_cast<const InetAddress *>(&(n.config.routes[i].via));
if ( (!checkIfManagedIsAllowed(n,*target)) || ((via->ss_family == target->ss_family)&&(matchIpOnly(myIps,*via))) )
continue;
bool haveRoute = false;
// Ignore routes implied by local managed IPs since adding the IP adds the route
for(std::vector<InetAddress>::iterator ip(n.managedIps.begin());ip!=n.managedIps.end();++ip) {
if ((target->netmaskBits() == ip->netmaskBits())&&(target->containsAddress(*ip))) {
haveRoute = true;
break;
}
}
if (haveRoute)
continue;
// If we've already applied this route, just sync it and continue
for(std::list< SharedPtr<ManagedRoute> >::iterator mr(n.managedRoutes.begin());mr!=n.managedRoutes.end();++mr) {
if ( ((*mr)->target() == *target) && ( ((via->ss_family == target->ss_family)&&((*mr)->via().ipsEqual(*via))) || (tapdev == (*mr)->device()) ) ) {
haveRoute = true;
(*mr)->sync();
break;
}
}
if (haveRoute)
continue;
// Add and apply new routes
n.managedRoutes.push_back(SharedPtr<ManagedRoute>(new ManagedRoute(*target,*via,tapdev)));
if (!n.managedRoutes.back()->sync())
n.managedRoutes.pop_back();
}
}
}
// Handlers for Node and Phy<> callbacks -----------------------------------
inline void phyOnDatagram(PhySocket *sock,void **uptr,const struct sockaddr *localAddr,const struct sockaddr *from,void *data,unsigned long len)
{
#ifdef ZT_ENABLE_CLUSTER
if (sock == _clusterMessageSocket) {
_lastDirectReceiveFromGlobal = OSUtils::now();
_node->clusterHandleIncomingMessage(data,len);
return;
}
#endif
#ifdef ZT_BREAK_UDP
if (OSUtils::fileExists("/tmp/ZT_BREAK_UDP"))
return;
#endif
if ((len >= 16)&&(reinterpret_cast<const InetAddress *>(from)->ipScope() == InetAddress::IP_SCOPE_GLOBAL))
_lastDirectReceiveFromGlobal = OSUtils::now();
const ZT_ResultCode rc = _node->processWirePacket(
OSUtils::now(),
reinterpret_cast<const struct sockaddr_storage *>(localAddr),
(const struct sockaddr_storage *)from, // Phy<> uses sockaddr_storage, so it'll always be that big
data,
len,
&_nextBackgroundTaskDeadline);
if (ZT_ResultCode_isFatal(rc)) {
char tmp[256];
Utils::snprintf(tmp,sizeof(tmp),"fatal error code from processWirePacket: %d",(int)rc);
Mutex::Lock _l(_termReason_m);
_termReason = ONE_UNRECOVERABLE_ERROR;
_fatalErrorMessage = tmp;
this->terminate();
}
}
inline void phyOnTcpConnect(PhySocket *sock,void **uptr,bool success)
{
if (!success)
return;
// Outgoing TCP connections are always TCP fallback tunnel connections.
TcpConnection *tc = new TcpConnection();
_tcpConnections.insert(tc);
tc->type = TcpConnection::TCP_TUNNEL_OUTGOING;
tc->shouldKeepAlive = true;
tc->parent = this;
tc->sock = sock;
// from and parser are not used
tc->messageSize = 0; // unused
tc->lastActivity = OSUtils::now();
// HTTP stuff is not used
tc->writeBuf = "";
*uptr = (void *)tc;
// Send "hello" message
tc->writeBuf.push_back((char)0x17);
tc->writeBuf.push_back((char)0x03);
tc->writeBuf.push_back((char)0x03); // fake TLS 1.2 header
tc->writeBuf.push_back((char)0x00);
tc->writeBuf.push_back((char)0x04); // mlen == 4
tc->writeBuf.push_back((char)ZEROTIER_ONE_VERSION_MAJOR);
tc->writeBuf.push_back((char)ZEROTIER_ONE_VERSION_MINOR);
tc->writeBuf.push_back((char)((ZEROTIER_ONE_VERSION_REVISION >> 8) & 0xff));
tc->writeBuf.push_back((char)(ZEROTIER_ONE_VERSION_REVISION & 0xff));
_phy.setNotifyWritable(sock,true);
_tcpFallbackTunnel = tc;
}
inline void phyOnTcpAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN,const struct sockaddr *from)
{
if (!from) {
_phy.close(sockN,false);
return;
} else {
TcpConnection *tc = new TcpConnection();
_tcpConnections.insert(tc);
tc->type = TcpConnection::TCP_HTTP_INCOMING;
tc->shouldKeepAlive = true;
tc->parent = this;
tc->sock = sockN;
tc->from = from;
http_parser_init(&(tc->parser),HTTP_REQUEST);
tc->parser.data = (void *)tc;
tc->messageSize = 0;
tc->lastActivity = OSUtils::now();
tc->currentHeaderField = "";
tc->currentHeaderValue = "";
tc->url = "";
tc->status = "";
tc->headers.clear();
tc->body = "";
tc->writeBuf = "";
*uptrN = (void *)tc;
}
}
inline void phyOnTcpClose(PhySocket *sock,void **uptr)
{
TcpConnection *tc = (TcpConnection *)*uptr;
if (tc) {
if (tc == _tcpFallbackTunnel)
_tcpFallbackTunnel = (TcpConnection *)0;
_tcpConnections.erase(tc);
delete tc;
}
}
inline void phyOnTcpData(PhySocket *sock,void **uptr,void *data,unsigned long len)
{
TcpConnection *tc = reinterpret_cast<TcpConnection *>(*uptr);
switch(tc->type) {
case TcpConnection::TCP_HTTP_INCOMING:
case TcpConnection::TCP_HTTP_OUTGOING:
http_parser_execute(&(tc->parser),&HTTP_PARSER_SETTINGS,(const char *)data,len);
if ((tc->parser.upgrade)||(tc->parser.http_errno != HPE_OK)) {
_phy.close(sock);
return;
}
break;
case TcpConnection::TCP_TUNNEL_OUTGOING:
tc->body.append((const char *)data,len);
while (tc->body.length() >= 5) {
const char *data = tc->body.data();
const unsigned long mlen = ( ((((unsigned long)data[3]) & 0xff) << 8) | (((unsigned long)data[4]) & 0xff) );
if (tc->body.length() >= (mlen + 5)) {
InetAddress from;
unsigned long plen = mlen; // payload length, modified if there's an IP header
data += 5; // skip forward past pseudo-TLS junk and mlen
if (plen == 4) {
// Hello message, which isn't sent by proxy and would be ignored by client
} else if (plen) {
// Messages should contain IPv4 or IPv6 source IP address data
switch(data[0]) {
case 4: // IPv4
if (plen >= 7) {
from.set((const void *)(data + 1),4,((((unsigned int)data[5]) & 0xff) << 8) | (((unsigned int)data[6]) & 0xff));
data += 7; // type + 4 byte IP + 2 byte port
plen -= 7;
} else {
_phy.close(sock);
return;
}
break;
case 6: // IPv6
if (plen >= 19) {
from.set((const void *)(data + 1),16,((((unsigned int)data[17]) & 0xff) << 8) | (((unsigned int)data[18]) & 0xff));
data += 19; // type + 16 byte IP + 2 byte port
plen -= 19;
} else {
_phy.close(sock);
return;
}
break;
case 0: // none/omitted
++data;
--plen;
break;
default: // invalid address type
_phy.close(sock);
return;
}
if (from) {
InetAddress fakeTcpLocalInterfaceAddress((uint32_t)0xffffffff,0xffff);
const ZT_ResultCode rc = _node->processWirePacket(
OSUtils::now(),
reinterpret_cast<struct sockaddr_storage *>(&fakeTcpLocalInterfaceAddress),
reinterpret_cast<struct sockaddr_storage *>(&from),
data,
plen,
&_nextBackgroundTaskDeadline);
if (ZT_ResultCode_isFatal(rc)) {
char tmp[256];
Utils::snprintf(tmp,sizeof(tmp),"fatal error code from processWirePacket: %d",(int)rc);
Mutex::Lock _l(_termReason_m);
_termReason = ONE_UNRECOVERABLE_ERROR;
_fatalErrorMessage = tmp;
this->terminate();
_phy.close(sock);
return;
}
}
}
if (tc->body.length() > (mlen + 5))
tc->body = tc->body.substr(mlen + 5);
else tc->body = "";
} else break;
}
break;
}
}
inline void phyOnTcpWritable(PhySocket *sock,void **uptr)
{
TcpConnection *tc = reinterpret_cast<TcpConnection *>(*uptr);
Mutex::Lock _l(tc->writeBuf_m);
if (tc->writeBuf.length() > 0) {
long sent = (long)_phy.streamSend(sock,tc->writeBuf.data(),(unsigned long)tc->writeBuf.length(),true);
if (sent > 0) {
tc->lastActivity = OSUtils::now();
if ((unsigned long)sent >= (unsigned long)tc->writeBuf.length()) {
tc->writeBuf = "";
_phy.setNotifyWritable(sock,false);
if (!tc->shouldKeepAlive)
_phy.close(sock); // will call close handler to delete from _tcpConnections
} else {
tc->writeBuf = tc->writeBuf.substr(sent);
}
}
} else {
_phy.setNotifyWritable(sock,false);
}
}
inline void phyOnFileDescriptorActivity(PhySocket *sock,void **uptr,bool readable,bool writable) {}
inline void phyOnUnixAccept(PhySocket *sockL,PhySocket *sockN,void **uptrL,void **uptrN) {}
inline void phyOnUnixClose(PhySocket *sock,void **uptr) {}
inline void phyOnUnixData(PhySocket *sock,void **uptr,void *data,unsigned long len) {}
inline void phyOnUnixWritable(PhySocket *sock,void **uptr,bool lwip_invoked) {}
inline int nodeVirtualNetworkConfigFunction(uint64_t nwid,void **nuptr,enum ZT_VirtualNetworkConfigOperation op,const ZT_VirtualNetworkConfig *nwc)
{
Mutex::Lock _l(_nets_m);
NetworkState &n = _nets[nwid];
switch(op) {
case ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_UP:
if (!n.tap) {
try {
char friendlyName[128];
Utils::snprintf(friendlyName,sizeof(friendlyName),"ZeroTier One [%.16llx]",nwid);
n.tap = new EthernetTap(
_homePath.c_str(),
MAC(nwc->mac),
nwc->mtu,
(unsigned int)ZT_IF_METRIC,
nwid,
friendlyName,
StapFrameHandler,
(void *)this);
*nuptr = (void *)&n;
char nlcpath[256];
Utils::snprintf(nlcpath,sizeof(nlcpath),"%s" ZT_PATH_SEPARATOR_S "networks.d" ZT_PATH_SEPARATOR_S "%.16llx.local.conf",_homePath.c_str(),nwid);
std::string nlcbuf;
if (OSUtils::readFile(nlcpath,nlcbuf)) {
Dictionary<4096> nc;
nc.load(nlcbuf.c_str());
n.settings.allowManaged = nc.getB("allowManaged",true);
n.settings.allowGlobal = nc.getB("allowGlobal",false);
n.settings.allowDefault = nc.getB("allowDefault",false);
}
} catch (std::exception &exc) {
#ifdef __WINDOWS__
FILE *tapFailLog = fopen((_homePath + ZT_PATH_SEPARATOR_S"port_error_log.txt").c_str(),"a");
if (tapFailLog) {
fprintf(tapFailLog,"%.16llx: %s" ZT_EOL_S,(unsigned long long)nwid,exc.what());
fclose(tapFailLog);
}
#else
fprintf(stderr,"ERROR: unable to configure virtual network port: %s" ZT_EOL_S,exc.what());
#endif
_nets.erase(nwid);
return -999;
} catch ( ... ) {
return -999; // tap init failed
}
}
// After setting up tap, fall through to CONFIG_UPDATE since we also want to do this...
case ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_CONFIG_UPDATE:
memcpy(&(n.config),nwc,sizeof(ZT_VirtualNetworkConfig));
if (n.tap) { // sanity check
syncManagedStuff(n,true,true);
} else {
_nets.erase(nwid);
return -999; // tap init failed
}
break;
case ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_DOWN:
case ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_DESTROY:
if (n.tap) { // sanity check
#ifdef __WINDOWS__
std::string winInstanceId(n.tap->instanceId());
#endif
*nuptr = (void *)0;
delete n.tap;
_nets.erase(nwid);
#ifdef __WINDOWS__
if ((op == ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_DESTROY)&&(winInstanceId.length() > 0))
WindowsEthernetTap::deletePersistentTapDevice(winInstanceId.c_str());
#endif
if (op == ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_DESTROY) {
char nlcpath[256];
Utils::snprintf(nlcpath,sizeof(nlcpath),"%s" ZT_PATH_SEPARATOR_S "networks.d" ZT_PATH_SEPARATOR_S "%.16llx.local.conf",_homePath.c_str(),nwid);
OSUtils::rm(nlcpath);
}
} else {
_nets.erase(nwid);
}
break;
}
return 0;
}
inline void nodeEventCallback(enum ZT_Event event,const void *metaData)
{
switch(event) {
case ZT_EVENT_FATAL_ERROR_IDENTITY_COLLISION: {
Mutex::Lock _l(_termReason_m);
_termReason = ONE_IDENTITY_COLLISION;
_fatalErrorMessage = "identity/address collision";
this->terminate();
} break;
case ZT_EVENT_TRACE: {
if (metaData) {
::fprintf(stderr,"%s" ZT_EOL_S,(const char *)metaData);
::fflush(stderr);
}
} break;
default:
break;
}
}
inline long nodeDataStoreGetFunction(const char *name,void *buf,unsigned long bufSize,unsigned long readIndex,unsigned long *totalSize)
{
std::string p(_dataStorePrepPath(name));
if (!p.length())
return -2;
FILE *f = fopen(p.c_str(),"rb");
if (!f)
return -1;
if (fseek(f,0,SEEK_END) != 0) {
fclose(f);
return -2;
}
long ts = ftell(f);
if (ts < 0) {
fclose(f);
return -2;
}
*totalSize = (unsigned long)ts;
if (fseek(f,(long)readIndex,SEEK_SET) != 0) {
fclose(f);
return -2;
}
long n = (long)fread(buf,1,bufSize,f);
fclose(f);
return n;
}
inline int nodeDataStorePutFunction(const char *name,const void *data,unsigned long len,int secure)
{
std::string p(_dataStorePrepPath(name));
if (!p.length())
return -2;
if (!data) {
OSUtils::rm(p.c_str());
return 0;
}
FILE *f = fopen(p.c_str(),"wb");
if (!f)
return -1;
if (fwrite(data,len,1,f) == 1) {
fclose(f);
if (secure)
OSUtils::lockDownFile(p.c_str(),false);
return 0;
} else {
fclose(f);
OSUtils::rm(p.c_str());
return -1;
}
}
inline int nodeWirePacketSendFunction(const struct sockaddr_storage *localAddr,const struct sockaddr_storage *addr,const void *data,unsigned int len,unsigned int ttl)
{
unsigned int fromBindingNo = 0;
if (addr->ss_family == AF_INET) {
if (reinterpret_cast<const struct sockaddr_in *>(localAddr)->sin_port == 0) {
// If sender is sending from wildcard (null address), choose the secondary backup
// port 1/4 of the time. (but only for IPv4)
fromBindingNo = (++_udpPortPickerCounter & 0x4) >> 2;
if (!_ports[fromBindingNo])
fromBindingNo = 0;
} else {
const uint16_t lp = reinterpret_cast<const struct sockaddr_in *>(localAddr)->sin_port;
if (lp == _portsBE[1])
fromBindingNo = 1;
else if (lp == _portsBE[2])
fromBindingNo = 2;
}
#ifdef ZT_TCP_FALLBACK_RELAY
// TCP fallback tunnel support, currently IPv4 only
if ((len >= 16)&&(reinterpret_cast<const InetAddress *>(addr)->ipScope() == InetAddress::IP_SCOPE_GLOBAL)) {
// Engage TCP tunnel fallback if we haven't received anything valid from a global
// IP address in ZT_TCP_FALLBACK_AFTER milliseconds. If we do start getting
// valid direct traffic we'll stop using it and close the socket after a while.
const uint64_t now = OSUtils::now();
if (((now - _lastDirectReceiveFromGlobal) > ZT_TCP_FALLBACK_AFTER)&&((now - _lastRestart) > ZT_TCP_FALLBACK_AFTER)) {
if (_tcpFallbackTunnel) {
Mutex::Lock _l(_tcpFallbackTunnel->writeBuf_m);
if (!_tcpFallbackTunnel->writeBuf.length())
_phy.setNotifyWritable(_tcpFallbackTunnel->sock,true);
unsigned long mlen = len + 7;
_tcpFallbackTunnel->writeBuf.push_back((char)0x17);
_tcpFallbackTunnel->writeBuf.push_back((char)0x03);
_tcpFallbackTunnel->writeBuf.push_back((char)0x03); // fake TLS 1.2 header
_tcpFallbackTunnel->writeBuf.push_back((char)((mlen >> 8) & 0xff));
_tcpFallbackTunnel->writeBuf.push_back((char)(mlen & 0xff));
_tcpFallbackTunnel->writeBuf.push_back((char)4); // IPv4
_tcpFallbackTunnel->writeBuf.append(reinterpret_cast<const char *>(reinterpret_cast<const void *>(&(reinterpret_cast<const struct sockaddr_in *>(addr)->sin_addr.s_addr))),4);
_tcpFallbackTunnel->writeBuf.append(reinterpret_cast<const char *>(reinterpret_cast<const void *>(&(reinterpret_cast<const struct sockaddr_in *>(addr)->sin_port))),2);
_tcpFallbackTunnel->writeBuf.append((const char *)data,len);
} else if (((now - _lastSendToGlobalV4) < ZT_TCP_FALLBACK_AFTER)&&((now - _lastSendToGlobalV4) > (ZT_PING_CHECK_INVERVAL / 2))) {
std::vector<InetAddress> tunnelIps(_tcpFallbackResolver.get());
if (tunnelIps.empty()) {
if (!_tcpFallbackResolver.running())
_tcpFallbackResolver.resolveNow();
} else {
bool connected = false;
InetAddress addr(tunnelIps[(unsigned long)now % tunnelIps.size()]);
addr.setPort(ZT_TCP_FALLBACK_RELAY_PORT);
_phy.tcpConnect(reinterpret_cast<const struct sockaddr *>(&addr),connected);
}
}
}
_lastSendToGlobalV4 = now;
}
#endif // ZT_TCP_FALLBACK_RELAY
} else if (addr->ss_family == AF_INET6) {
if (reinterpret_cast<const struct sockaddr_in6 *>(localAddr)->sin6_port != 0) {
const uint16_t lp = reinterpret_cast<const struct sockaddr_in6 *>(localAddr)->sin6_port;
if (lp == _portsBE[1])
fromBindingNo = 1;
else if (lp == _portsBE[2])
fromBindingNo = 2;
}
} else {
return -1;
}
#ifdef ZT_BREAK_UDP
if (OSUtils::fileExists("/tmp/ZT_BREAK_UDP"))
return 0; // silently break UDP
#endif
return (_bindings[fromBindingNo].udpSend(_phy,*(reinterpret_cast<const InetAddress *>(localAddr)),*(reinterpret_cast<const InetAddress *>(addr)),data,len,ttl)) ? 0 : -1;
}
inline void nodeVirtualNetworkFrameFunction(uint64_t nwid,void **nuptr,uint64_t sourceMac,uint64_t destMac,unsigned int etherType,unsigned int vlanId,const void *data,unsigned int len)
{
NetworkState *n = reinterpret_cast<NetworkState *>(*nuptr);
if ((!n)||(!n->tap))
return;
n->tap->put(MAC(sourceMac),MAC(destMac),etherType,data,len);
}
inline int nodePathCheckFunction(uint64_t ztaddr,const struct sockaddr_storage *localAddr,const struct sockaddr_storage *remoteAddr)
{
// Make sure we're not trying to do ZeroTier-over-ZeroTier
{
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<InetAddress> ips(n->second.tap->ips());
for(std::vector<InetAddress>::const_iterator i(ips.begin());i!=ips.end();++i) {
if (i->containsAddress(*(reinterpret_cast<const InetAddress *>(remoteAddr)))) {
return 0;
}
}
}
}
}
/* Note: I do not think we need to scan for overlap with managed routes
* because of the "route forking" and interface binding that we do. This
* ensures (we hope) that ZeroTier traffic will still take the physical
* path even if its managed routes override this for other traffic. Will
* revisit if we see recursion problems. */
// Check blacklists
const Hashtable< uint64_t,std::vector<InetAddress> > *blh = (const Hashtable< uint64_t,std::vector<InetAddress> > *)0;
const std::vector<InetAddress> *gbl = (const std::vector<InetAddress> *)0;
if (remoteAddr->ss_family == AF_INET) {
blh = &_v4Blacklists;
gbl = &_globalV4Blacklist;
} else if (remoteAddr->ss_family == AF_INET6) {
blh = &_v6Blacklists;
gbl = &_globalV6Blacklist;
}
if (blh) {
Mutex::Lock _l(_localConfig_m);
const std::vector<InetAddress> *l = blh->get(ztaddr);
if (l) {
for(std::vector<InetAddress>::const_iterator a(l->begin());a!=l->end();++a) {
if (a->containsAddress(*reinterpret_cast<const InetAddress *>(remoteAddr)))
return 0;
}
}
for(std::vector<InetAddress>::const_iterator a(gbl->begin());a!=gbl->end();++a) {
if (a->containsAddress(*reinterpret_cast<const InetAddress *>(remoteAddr)))
return 0;
}
}
return 1;
}
inline int nodePathLookupFunction(uint64_t ztaddr,int family,struct sockaddr_storage *result)
{
const Hashtable< uint64_t,std::vector<InetAddress> > *lh = (const Hashtable< uint64_t,std::vector<InetAddress> > *)0;
if (family < 0)
lh = (_node->prng() & 1) ? &_v4Hints : &_v6Hints;
else if (family == AF_INET)
lh = &_v4Hints;
else if (family == AF_INET6)
lh = &_v6Hints;
else return 0;
const std::vector<InetAddress> *l = lh->get(ztaddr);
if ((l)&&(l->size() > 0)) {
memcpy(result,&((*l)[(unsigned long)_node->prng() % l->size()]),sizeof(struct sockaddr_storage));
return 1;
} else return 0;
}
inline void tapFrameHandler(uint64_t nwid,const MAC &from,const MAC &to,unsigned int etherType,unsigned int vlanId,const void *data,unsigned int len)
{
_node->processVirtualNetworkFrame(OSUtils::now(),nwid,from.toInt(),to.toInt(),etherType,vlanId,data,len,&_nextBackgroundTaskDeadline);
}
inline void onHttpRequestToServer(TcpConnection *tc)
{
char tmpn[256];
std::string data;
std::string contentType("text/plain"); // default if not changed in handleRequest()
unsigned int scode = 404;
if ( ((!_allowManagementFrom)&&(tc->from.ipScope() == InetAddress::IP_SCOPE_LOOPBACK)) || (_allowManagementFrom.containsAddress(tc->from)) ) {
try {
if (_controlPlane)
scode = _controlPlane->handleRequest(tc->from,tc->parser.method,tc->url,tc->headers,tc->body,data,contentType);
else scode = 500;
} catch (std::exception &exc) {
fprintf(stderr,"WARNING: unexpected exception processing control HTTP request: %s" ZT_EOL_S,exc.what());
scode = 500;
} catch ( ... ) {
fprintf(stderr,"WARNING: unexpected exception processing control HTTP request: unknown exceptino" ZT_EOL_S);
scode = 500;
}
} else {
scode = 401;
}
const char *scodestr;
switch(scode) {
case 200: scodestr = "OK"; break;
case 400: scodestr = "Bad Request"; break;
case 401: scodestr = "Unauthorized"; break;
case 403: scodestr = "Forbidden"; break;
case 404: scodestr = "Not Found"; break;
case 500: scodestr = "Internal Server Error"; break;
case 501: scodestr = "Not Implemented"; break;
case 503: scodestr = "Service Unavailable"; break;
default: scodestr = "Error"; break;
}
Utils::snprintf(tmpn,sizeof(tmpn),"HTTP/1.1 %.3u %s\r\nCache-Control: no-cache\r\nPragma: no-cache\r\n",scode,scodestr);
{
Mutex::Lock _l(tc->writeBuf_m);
tc->writeBuf.assign(tmpn);
tc->writeBuf.append("Content-Type: ");
tc->writeBuf.append(contentType);
Utils::snprintf(tmpn,sizeof(tmpn),"\r\nContent-Length: %lu\r\n",(unsigned long)data.length());
tc->writeBuf.append(tmpn);
if (!tc->shouldKeepAlive)
tc->writeBuf.append("Connection: close\r\n");
tc->writeBuf.append("\r\n");
if (tc->parser.method != HTTP_HEAD)
tc->writeBuf.append(data);
}
_phy.setNotifyWritable(tc->sock,true);
}
inline void onHttpResponseFromClient(TcpConnection *tc)
{
if (!tc->shouldKeepAlive)
_phy.close(tc->sock); // will call close handler, which deletes from _tcpConnections
}
bool shouldBindInterface(const char *ifname,const InetAddress &ifaddr)
{
if (isBlacklistedLocalInterfaceForZeroTierTraffic(ifname))
return false;
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<InetAddress> ips(n->second.tap->ips());
for(std::vector<InetAddress>::const_iterator i(ips.begin());i!=ips.end();++i) {
if (i->ipsEqual(ifaddr))
return false;
}
}
}
return true;
}
std::string _dataStorePrepPath(const char *name) const
{
std::string p(_homePath);
p.push_back(ZT_PATH_SEPARATOR);
char lastc = (char)0;
for(const char *n=name;(*n);++n) {
if ((*n == '.')&&(lastc == '.'))
return std::string(); // don't allow ../../ stuff as a precaution
if (*n == '/') {
OSUtils::mkdir(p.c_str());
p.push_back(ZT_PATH_SEPARATOR);
} else p.push_back(*n);
lastc = *n;
}
return p;
}
bool _trialBind(unsigned int port)
{
struct sockaddr_in in4;
struct sockaddr_in6 in6;
PhySocket *tb;
memset(&in4,0,sizeof(in4));
in4.sin_family = AF_INET;
in4.sin_port = Utils::hton((uint16_t)port);
tb = _phy.udpBind(reinterpret_cast<const struct sockaddr *>(&in4),(void *)0,0);
if (tb) {
_phy.close(tb,false);
tb = _phy.tcpListen(reinterpret_cast<const struct sockaddr *>(&in4),(void *)0);
if (tb) {
_phy.close(tb,false);
return true;
}
}
memset(&in6,0,sizeof(in6));
in6.sin6_family = AF_INET6;
in6.sin6_port = Utils::hton((uint16_t)port);
tb = _phy.udpBind(reinterpret_cast<const struct sockaddr *>(&in6),(void *)0,0);
if (tb) {
_phy.close(tb,false);
tb = _phy.tcpListen(reinterpret_cast<const struct sockaddr *>(&in6),(void *)0);
if (tb) {
_phy.close(tb,false);
return true;
}
}
return false;
}
};
static int SnodeVirtualNetworkConfigFunction(ZT_Node *node,void *uptr,uint64_t nwid,void **nuptr,enum ZT_VirtualNetworkConfigOperation op,const ZT_VirtualNetworkConfig *nwconf)
{ return reinterpret_cast<OneServiceImpl *>(uptr)->nodeVirtualNetworkConfigFunction(nwid,nuptr,op,nwconf); }
static void SnodeEventCallback(ZT_Node *node,void *uptr,enum ZT_Event event,const void *metaData)
{ reinterpret_cast<OneServiceImpl *>(uptr)->nodeEventCallback(event,metaData); }
static long SnodeDataStoreGetFunction(ZT_Node *node,void *uptr,const char *name,void *buf,unsigned long bufSize,unsigned long readIndex,unsigned long *totalSize)
{ return reinterpret_cast<OneServiceImpl *>(uptr)->nodeDataStoreGetFunction(name,buf,bufSize,readIndex,totalSize); }
static int SnodeDataStorePutFunction(ZT_Node *node,void *uptr,const char *name,const void *data,unsigned long len,int secure)
{ return reinterpret_cast<OneServiceImpl *>(uptr)->nodeDataStorePutFunction(name,data,len,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)
{ return reinterpret_cast<OneServiceImpl *>(uptr)->nodeWirePacketSendFunction(localAddr,addr,data,len,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)
{ reinterpret_cast<OneServiceImpl *>(uptr)->nodeVirtualNetworkFrameFunction(nwid,nuptr,sourceMac,destMac,etherType,vlanId,data,len); }
static int SnodePathCheckFunction(ZT_Node *node,void *uptr,uint64_t ztaddr,const struct sockaddr_storage *localAddr,const struct sockaddr_storage *remoteAddr)
{ return reinterpret_cast<OneServiceImpl *>(uptr)->nodePathCheckFunction(ztaddr,localAddr,remoteAddr); }
static int SnodePathLookupFunction(ZT_Node *node,void *uptr,uint64_t ztaddr,int family,struct sockaddr_storage *result)
{ return reinterpret_cast<OneServiceImpl *>(uptr)->nodePathLookupFunction(ztaddr,family,result); }
#ifdef ZT_ENABLE_CLUSTER
static void SclusterSendFunction(void *uptr,unsigned int toMemberId,const void *data,unsigned int len)
{
OneServiceImpl *const impl = reinterpret_cast<OneServiceImpl *>(uptr);
const ClusterDefinition::MemberDefinition &md = (*(impl->_clusterDefinition))[toMemberId];
if (md.clusterEndpoint)
impl->_phy.udpSend(impl->_clusterMessageSocket,reinterpret_cast<const struct sockaddr *>(&(md.clusterEndpoint)),data,len);
}
static int SclusterGeoIpFunction(void *uptr,const struct sockaddr_storage *addr,int *x,int *y,int *z)
{
OneServiceImpl *const impl = reinterpret_cast<OneServiceImpl *>(uptr);
return (int)(impl->_clusterDefinition->geo().locate(*(reinterpret_cast<const InetAddress *>(addr)),*x,*y,*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)
{ reinterpret_cast<OneServiceImpl *>(uptr)->tapFrameHandler(nwid,from,to,etherType,vlanId,data,len); }
static int ShttpOnMessageBegin(http_parser *parser)
{
TcpConnection *tc = reinterpret_cast<TcpConnection *>(parser->data);
tc->currentHeaderField = "";
tc->currentHeaderValue = "";
tc->messageSize = 0;
tc->url = "";
tc->status = "";
tc->headers.clear();
tc->body = "";
return 0;
}
static int ShttpOnUrl(http_parser *parser,const char *ptr,size_t length)
{
TcpConnection *tc = reinterpret_cast<TcpConnection *>(parser->data);
tc->messageSize += (unsigned long)length;
if (tc->messageSize > ZT_MAX_HTTP_MESSAGE_SIZE)
return -1;
tc->url.append(ptr,length);
return 0;
}
#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
{
/*
TcpConnection *tc = reinterpret_cast<TcpConnection *>(parser->data);
tc->messageSize += (unsigned long)length;
if (tc->messageSize > ZT_MAX_HTTP_MESSAGE_SIZE)
return -1;
tc->status.append(ptr,length);
*/
return 0;
}
static int ShttpOnHeaderField(http_parser *parser,const char *ptr,size_t length)
{
TcpConnection *tc = reinterpret_cast<TcpConnection *>(parser->data);
tc->messageSize += (unsigned long)length;
if (tc->messageSize > ZT_MAX_HTTP_MESSAGE_SIZE)
return -1;
if ((tc->currentHeaderField.length())&&(tc->currentHeaderValue.length())) {
tc->headers[tc->currentHeaderField] = tc->currentHeaderValue;
tc->currentHeaderField = "";
tc->currentHeaderValue = "";
}
for(size_t i=0;i<length;++i)
tc->currentHeaderField.push_back(OSUtils::toLower(ptr[i]));
return 0;
}
static int ShttpOnValue(http_parser *parser,const char *ptr,size_t length)
{
TcpConnection *tc = reinterpret_cast<TcpConnection *>(parser->data);
tc->messageSize += (unsigned long)length;
if (tc->messageSize > ZT_MAX_HTTP_MESSAGE_SIZE)
return -1;
tc->currentHeaderValue.append(ptr,length);
return 0;
}
static int ShttpOnHeadersComplete(http_parser *parser)
{
TcpConnection *tc = reinterpret_cast<TcpConnection *>(parser->data);
if ((tc->currentHeaderField.length())&&(tc->currentHeaderValue.length()))
tc->headers[tc->currentHeaderField] = tc->currentHeaderValue;
return 0;
}
static int ShttpOnBody(http_parser *parser,const char *ptr,size_t length)
{
TcpConnection *tc = reinterpret_cast<TcpConnection *>(parser->data);
tc->messageSize += (unsigned long)length;
if (tc->messageSize > ZT_MAX_HTTP_MESSAGE_SIZE)
return -1;
tc->body.append(ptr,length);
return 0;
}
static int ShttpOnMessageComplete(http_parser *parser)
{
TcpConnection *tc = reinterpret_cast<TcpConnection *>(parser->data);
tc->shouldKeepAlive = (http_should_keep_alive(parser) != 0);
tc->lastActivity = OSUtils::now();
if (tc->type == TcpConnection::TCP_HTTP_INCOMING) {
tc->parent->onHttpRequestToServer(tc);
} else {
tc->parent->onHttpResponseFromClient(tc);
}
return 0;
}
} // anonymous namespace
std::string OneService::platformDefaultHomePath()
{
return OSUtils::platformDefaultHomePath();
}
std::string OneService::autoUpdateUrl()
{
#ifdef ZT_AUTO_UPDATE
/*
#if defined(__LINUX__) && ( defined(__i386__) || defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(__i386) )
if (sizeof(void *) == 8)
return "http://download.zerotier.com/ZeroTierOneInstaller-linux-x64-LATEST.nfo";
else return "http://download.zerotier.com/ZeroTierOneInstaller-linux-x86-LATEST.nfo";
#endif
*/
#if defined(__APPLE__) && ( defined(__i386__) || defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(__i386) )
return "http://download.zerotier.com/update/mac_intel/";
#endif
#ifdef __WINDOWS__
return "http://download.zerotier.com/update/win_intel/";
#endif
#endif // ZT_AUTO_UPDATE
return std::string();
}
OneService *OneService::newInstance(const char *hp,unsigned int port,const char *allowManagementFrom) { return new OneServiceImpl(hp,port,allowManagementFrom); }
OneService::~OneService() {}
} // namespace ZeroTier
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