mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-21 13:57:49 +00:00
334 lines
10 KiB
C++
334 lines
10 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2017 ZeroTier, Inc. https://www.zerotier.com/
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* You can be released from the requirements of the license by purchasing
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* a commercial license. Buying such a license is mandatory as soon as you
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* develop commercial closed-source software that incorporates or links
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* directly against ZeroTier software without disclosing the source code
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* of your own application.
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*/
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#ifdef ZT_USE_MINIUPNPC
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// Uncomment to dump debug messages
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//#define ZT_PORTMAPPER_TRACE 1
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string>
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#include "../node/Utils.hpp"
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#include "OSUtils.hpp"
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#include "PortMapper.hpp"
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// These must be defined to get rid of dynamic export stuff in libminiupnpc and libnatpmp
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#ifdef __WINDOWS__
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#ifndef MINIUPNP_STATICLIB
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#define MINIUPNP_STATICLIB
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#endif
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#ifndef STATICLIB
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#define STATICLIB
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#endif
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#endif
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#ifdef ZT_USE_SYSTEM_MINIUPNPC
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#include <miniupnpc/miniupnpc.h>
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#include <miniupnpc/upnpcommands.h>
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#else
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#include "../ext/miniupnpc/miniupnpc.h"
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#include "../ext/miniupnpc/upnpcommands.h"
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#endif
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#ifdef ZT_USE_SYSTEM_NATPMP
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#include <natpmp.h>
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#else
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#include "../ext/libnatpmp/natpmp.h"
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#endif
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namespace ZeroTier {
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class PortMapperImpl
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{
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public:
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PortMapperImpl(int localUdpPortToMap,const char *un) :
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run(true),
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localPort(localUdpPortToMap),
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uniqueName(un)
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{
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}
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~PortMapperImpl() {}
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void threadMain()
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throw()
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{
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int mode = 0; // 0 == NAT-PMP, 1 == UPnP
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: started for UDP port %d"ZT_EOL_S,localPort);
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#endif
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while (run) {
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// ---------------------------------------------------------------------
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// NAT-PMP mode (preferred)
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// ---------------------------------------------------------------------
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if (mode == 0) {
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natpmp_t natpmp;
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natpmpresp_t response;
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int r = 0;
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bool natPmpSuccess = false;
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for(int tries=0;tries<60;++tries) {
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int tryPort = (int)localPort + tries;
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if (tryPort >= 65535)
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tryPort = (tryPort - 65535) + 1025;
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memset(&natpmp,0,sizeof(natpmp));
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memset(&response,0,sizeof(response));
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if (initnatpmp(&natpmp,0,0) != 0) {
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mode = 1;
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: NAT-PMP: init failed, switching to UPnP mode"ZT_EOL_S);
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#endif
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break;
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}
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InetAddress publicAddress;
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sendpublicaddressrequest(&natpmp);
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uint64_t myTimeout = OSUtils::now() + 5000;
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do {
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fd_set fds;
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struct timeval timeout;
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FD_ZERO(&fds);
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FD_SET(natpmp.s, &fds);
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getnatpmprequesttimeout(&natpmp, &timeout);
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select(FD_SETSIZE, &fds, NULL, NULL, &timeout);
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r = readnatpmpresponseorretry(&natpmp, &response);
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if (OSUtils::now() >= myTimeout)
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break;
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} while (r == NATPMP_TRYAGAIN);
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if (r == 0) {
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publicAddress = InetAddress((uint32_t)response.pnu.publicaddress.addr.s_addr,0);
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} else {
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: NAT-PMP: request for external address failed, aborting..."ZT_EOL_S);
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#endif
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closenatpmp(&natpmp);
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break;
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}
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sendnewportmappingrequest(&natpmp,NATPMP_PROTOCOL_UDP,localPort,tryPort,(ZT_PORTMAPPER_REFRESH_DELAY * 2) / 1000);
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myTimeout = OSUtils::now() + 10000;
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do {
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fd_set fds;
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struct timeval timeout;
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FD_ZERO(&fds);
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FD_SET(natpmp.s, &fds);
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getnatpmprequesttimeout(&natpmp, &timeout);
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select(FD_SETSIZE, &fds, NULL, NULL, &timeout);
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r = readnatpmpresponseorretry(&natpmp, &response);
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if (OSUtils::now() >= myTimeout)
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break;
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} while (r == NATPMP_TRYAGAIN);
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if (r == 0) {
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publicAddress.setPort(response.pnu.newportmapping.mappedpublicport);
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: NAT-PMP: mapped %u to %s"ZT_EOL_S,(unsigned int)localPort,publicAddress.toString().c_str());
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#endif
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Mutex::Lock sl(surface_l);
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surface.clear();
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surface.push_back(publicAddress);
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natPmpSuccess = true;
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closenatpmp(&natpmp);
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break;
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} else {
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closenatpmp(&natpmp);
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// continue
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}
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}
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if (!natPmpSuccess) {
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mode = 1;
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: NAT-PMP: request failed, switching to UPnP mode"ZT_EOL_S);
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#endif
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}
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}
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// ---------------------------------------------------------------------
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// ---------------------------------------------------------------------
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// UPnP mode
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// ---------------------------------------------------------------------
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if (mode == 1) {
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char lanaddr[4096];
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char externalip[4096]; // no range checking? so make these buffers larger than any UDP packet a uPnP server could send us as a precaution :P
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char inport[16];
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char outport[16];
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struct UPNPUrls urls;
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struct IGDdatas data;
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int upnpError = 0;
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UPNPDev *devlist = upnpDiscoverAll(5000,(const char *)0,(const char *)0,0,0,2,&upnpError);
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if (devlist) {
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#ifdef ZT_PORTMAPPER_TRACE
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{
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UPNPDev *dev = devlist;
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while (dev) {
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fprintf(stderr,"PortMapper: found UPnP device at URL '%s': %s"ZT_EOL_S,dev->descURL,dev->st);
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dev = dev->pNext;
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}
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}
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#endif
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memset(lanaddr,0,sizeof(lanaddr));
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memset(externalip,0,sizeof(externalip));
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memset(&urls,0,sizeof(urls));
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memset(&data,0,sizeof(data));
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Utils::snprintf(inport,sizeof(inport),"%d",localPort);
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if ((UPNP_GetValidIGD(devlist,&urls,&data,lanaddr,sizeof(lanaddr)))&&(lanaddr[0])) {
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: UPnP: my LAN IP address: %s"ZT_EOL_S,lanaddr);
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#endif
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if ((UPNP_GetExternalIPAddress(urls.controlURL,data.first.servicetype,externalip) == UPNPCOMMAND_SUCCESS)&&(externalip[0])) {
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: UPnP: my external IP address: %s"ZT_EOL_S,externalip);
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#endif
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for(int tries=0;tries<60;++tries) {
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int tryPort = (int)localPort + tries;
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if (tryPort >= 65535)
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tryPort = (tryPort - 65535) + 1025;
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Utils::snprintf(outport,sizeof(outport),"%u",tryPort);
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// First check and see if this port is already mapped to the
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// same unique name. If so, keep this mapping and don't try
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// to map again since this can break buggy routers. But don't
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// fail if this command fails since not all routers support it.
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{
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char haveIntClient[128]; // 128 == big enough for all these as per miniupnpc "documentation"
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char haveIntPort[128];
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char haveDesc[128];
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char haveEnabled[128];
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char haveLeaseDuration[128];
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memset(haveIntClient,0,sizeof(haveIntClient));
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memset(haveIntPort,0,sizeof(haveIntPort));
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memset(haveDesc,0,sizeof(haveDesc));
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memset(haveEnabled,0,sizeof(haveEnabled));
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memset(haveLeaseDuration,0,sizeof(haveLeaseDuration));
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if ((UPNP_GetSpecificPortMappingEntry(urls.controlURL,data.first.servicetype,outport,"UDP",(const char *)0,haveIntClient,haveIntPort,haveDesc,haveEnabled,haveLeaseDuration) == UPNPCOMMAND_SUCCESS)&&(uniqueName == haveDesc)) {
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: UPnP: reusing previously reserved external port: %s"ZT_EOL_S,outport);
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#endif
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Mutex::Lock sl(surface_l);
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surface.clear();
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InetAddress tmp(externalip);
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tmp.setPort(tryPort);
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surface.push_back(tmp);
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break;
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}
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}
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// Try to map this port
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int mapResult = 0;
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if ((mapResult = UPNP_AddPortMapping(urls.controlURL,data.first.servicetype,outport,inport,lanaddr,uniqueName.c_str(),"UDP",(const char *)0,"0")) == UPNPCOMMAND_SUCCESS) {
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: UPnP: reserved external port: %s"ZT_EOL_S,outport);
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#endif
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Mutex::Lock sl(surface_l);
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surface.clear();
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InetAddress tmp(externalip);
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tmp.setPort(tryPort);
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surface.push_back(tmp);
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break;
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} else {
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: UPnP: UPNP_AddPortMapping(%s) failed: %d"ZT_EOL_S,outport,mapResult);
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#endif
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Thread::sleep(1000);
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}
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}
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} else {
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mode = 0;
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: UPnP: UPNP_GetExternalIPAddress failed, returning to NAT-PMP mode"ZT_EOL_S);
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#endif
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}
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} else {
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mode = 0;
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: UPnP: UPNP_GetValidIGD failed, returning to NAT-PMP mode"ZT_EOL_S);
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#endif
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}
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freeUPNPDevlist(devlist);
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} else {
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mode = 0;
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"PortMapper: upnpDiscover failed, returning to NAT-PMP mode: %d"ZT_EOL_S,upnpError);
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#endif
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}
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}
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// ---------------------------------------------------------------------
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#ifdef ZT_PORTMAPPER_TRACE
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fprintf(stderr,"UPNPClient: rescanning in %d ms"ZT_EOL_S,ZT_PORTMAPPER_REFRESH_DELAY);
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#endif
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Thread::sleep(ZT_PORTMAPPER_REFRESH_DELAY);
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}
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delete this;
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}
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volatile bool run;
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int localPort;
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std::string uniqueName;
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Mutex surface_l;
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std::vector<InetAddress> surface;
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};
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PortMapper::PortMapper(int localUdpPortToMap,const char *uniqueName)
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{
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_impl = new PortMapperImpl(localUdpPortToMap,uniqueName);
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Thread::start(_impl);
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}
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PortMapper::~PortMapper()
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{
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_impl->run = false;
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}
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std::vector<InetAddress> PortMapper::get() const
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{
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Mutex::Lock _l(_impl->surface_l);
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return _impl->surface;
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}
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} // namespace ZeroTier
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#endif // ZT_USE_MINIUPNPC
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