mirror of
https://github.com/RetroShare/RetroShare.git
synced 2025-01-05 21:01:11 -05:00
467 lines
12 KiB
C++
467 lines
12 KiB
C++
/*******************************************************************************
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* libretroshare/src/upnp: upnphandler_libupnp.cc *
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* *
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* libretroshare: retroshare core library *
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* *
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* Copyright 2007-2018 Retroshare Team <retroshare.project@gmail.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 Lesser General Public License as *
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* published by the Free Software Foundation, either version 3 of the *
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* License, or (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 Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public License *
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* along with this program. If not, see <https://www.gnu.org/licenses/>. *
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* *
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*******************************************************************************/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef __cplusplus
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} /* extern C */
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#endif
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/* This stuff is actually C */
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#include "rs_upnp/upnphandler_libupnp.h"
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#include "util/rsnet.h"
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bool upnphandler::initUPnPState()
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{
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::initUPnPState" << std::endl;
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#endif
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cUPnPControlPoint = new CUPnPControlPoint(2000);
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bool IGWDetected = cUPnPControlPoint->GetIGWDeviceDetected();
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if (IGWDetected) {
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/* MODIFY STATE */
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dataMtx.lock(); /* LOCK MUTEX */
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upnpState = RS_UPNP_S_READY;
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::initUPnPState cUPnPControlPoint internal ip adress : ";
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std::cerr << cUPnPControlPoint->getInternalIpAddress() << std::endl;
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#endif
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//const char ipaddr = cUPnPControlPoint->getInternalIpAddress().c_str();
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inet_aton(cUPnPControlPoint->getInternalIpAddress(), &(upnp_iaddr.sin_addr));
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upnp_iaddr.sin_port = htons(iport);
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::initUPnPState READY" << std::endl;
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#endif
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dataMtx.unlock(); /* UNLOCK MUTEX */
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} else {
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upnpState = RS_UPNP_S_UNAVAILABLE;
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::initUPnPState UNAVAILABLE" << std::endl;
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#endif
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}
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return 0;
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}
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class upnpThreadData
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{
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public:
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upnphandler *handler;
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bool start;
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bool stop;
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};
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/* Thread routines */
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extern "C" void* doSetupUPnP(void* p)
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{
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#ifdef UPNP_DEBUG
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std::cerr << "doSetupUPnP Creating upnp thread." << std::endl;
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#endif
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upnpThreadData *data = (upnpThreadData *) p;
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if ((!data) || (!data->handler))
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{
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pthread_exit(NULL);
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}
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/* publish it! */
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if (data -> stop)
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{
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data->handler->shutdown_upnp();
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}
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if (data -> start)
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{
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data->handler->initUPnPState();
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data->handler->start_upnp();
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}
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delete data;
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pthread_exit(NULL);
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return NULL;
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}
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bool upnphandler::background_setup_upnp(bool start, bool stop)
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{
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pthread_t tid;
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/* launch thread */
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#ifdef UPNP_DEBUG
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std::cerr << "background_setup_upnp Creating upnp thread." << std::endl;
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#endif
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upnpThreadData *data = new upnpThreadData();
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data->handler = this;
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data->start = start;
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data->stop = stop;
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if(! pthread_create(&tid, 0, &doSetupUPnP, (void *) data))
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{
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pthread_detach(tid); /* so memory is reclaimed in linux */
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return true;
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}
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else
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{
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delete data ;
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std::cerr << "(EE) Could not start background upnp thread!" << std::endl;
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return false ;
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}
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}
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bool upnphandler::start_upnp()
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{
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if (!(upnpState >= RS_UPNP_S_READY))
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{
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::start_upnp() Not Ready" << std::endl;
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#endif
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return false;
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}
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struct sockaddr_in localAddr;
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{
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RsStackMutex stack(dataMtx); /* LOCK STACK MUTEX */
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/* if we're to load -> load */
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/* select external ports */
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eport_curr = eport;
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if (!eport_curr)
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{
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/* use local port if eport is zero */
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eport_curr = iport;
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::start_upnp() Using LocalPort for extPort." << std::endl;
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#endif
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}
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if (!eport_curr)
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{
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::start_upnp() Invalid eport ... " << std::endl;
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#endif
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return false;
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}
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/* our port */
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char in_addr[256];
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char in_port1[256];
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upnp_iaddr.sin_port = htons(iport);
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localAddr = upnp_iaddr;
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uint32_t linaddr = ntohl(localAddr.sin_addr.s_addr);
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snprintf(in_port1, 256, "%d", ntohs(localAddr.sin_port));
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snprintf(in_addr, 256, "%d.%d.%d.%d",
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((linaddr >> 24) & 0xff),
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((linaddr >> 16) & 0xff),
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((linaddr >> 8) & 0xff),
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((linaddr >> 0) & 0xff));
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#ifdef UPNP_DEBUG
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std::cerr << "Attempting Redirection: InAddr: " << in_addr;
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std::cerr << " InPort: " << in_port1;
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std::cerr << " ePort: " << eport_curr;
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std::cerr << " eProt: " << "TCP and UDP";
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std::cerr << std::endl;
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#endif
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}
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//first of all, build the mappings
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std::vector<CUPnPPortMapping> upnpPortMapping1;
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CUPnPPortMapping cUPnPPortMapping1 = CUPnPPortMapping(eport_curr, ntohs(localAddr.sin_port), "TCP", true, "tcp retroshare redirection");
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upnpPortMapping1.push_back(cUPnPPortMapping1);
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std::vector<CUPnPPortMapping> upnpPortMapping2;
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CUPnPPortMapping cUPnPPortMapping2 = CUPnPPortMapping(eport_curr, ntohs(localAddr.sin_port), "UDP", true, "udp retroshare redirection");
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upnpPortMapping2.push_back(cUPnPPortMapping2);
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//attempt to remove formal port redirection rules
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cUPnPControlPoint->DeletePortMappings(upnpPortMapping1);
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cUPnPControlPoint->DeletePortMappings(upnpPortMapping2);
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//add new rules
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bool res = cUPnPControlPoint->AddPortMappings(upnpPortMapping1);
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bool res2 = cUPnPControlPoint->AddPortMappings(upnpPortMapping2);
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struct sockaddr_storage extAddr;
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bool extAddrResult = getExternalAddress(extAddr);
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{
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RsStackMutex stack(dataMtx); /* LOCK STACK MUTEX */
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if (extAddrResult && (res || res2)) {
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upnpState = RS_UPNP_S_ACTIVE;
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} else {
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upnpState = RS_UPNP_S_TCP_AND_FAILED;
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}
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toStart = false;
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}
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return (upnpState == RS_UPNP_S_ACTIVE);
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}
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bool upnphandler::shutdown_upnp()
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{
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RsStackMutex stack(dataMtx); /* LOCK STACK MUTEX */
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/* always attempt this (unless no port number) */
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if (eport_curr > 0 && eport > 0 && (upnpState >= RS_UPNP_S_ACTIVE))
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{
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::shutdown_upnp() : Attempting To Remove Redirection: port: " << eport_curr;
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std::cerr << " Prot: TCP";
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std::cerr << std::endl;
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#endif
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std::vector<CUPnPPortMapping> upnpPortMapping1;
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CUPnPPortMapping cUPnPPortMapping1 = CUPnPPortMapping(eport_curr, 0, "TCP", true, "tcp redirection");
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upnpPortMapping1.push_back(cUPnPPortMapping1);
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cUPnPControlPoint->DeletePortMappings(upnpPortMapping1);
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::shutdown_upnp() : Attempting To Remove Redirection: port: " << eport_curr;
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std::cerr << " Prot: UDP";
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std::cerr << std::endl;
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#endif
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std::vector<CUPnPPortMapping> upnpPortMapping2;
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CUPnPPortMapping cUPnPPortMapping2 = CUPnPPortMapping(eport_curr, 0, "UDP", true, "udp redirection");
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upnpPortMapping2.push_back(cUPnPPortMapping2);
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cUPnPControlPoint->DeletePortMappings(upnpPortMapping2);
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//destroy the upnp object
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cUPnPControlPoint->~CUPnPControlPoint();
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cUPnPControlPoint=NULL ;
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} else {
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::shutdown_upnp() : avoid upnp connection for shutdonws because probably a net flag went down." << std::endl;
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#endif
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}
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//stopping os ok, set starting to true for next net reset
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toStop = false;
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toStart = true;
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upnpState = RS_UPNP_S_UNINITIALISED;
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return true;
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}
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/************************ External Interface *****************************
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*
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*
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*
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*/
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upnphandler::upnphandler()
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:
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upnpState(RS_UPNP_S_UNINITIALISED), dataMtx("upupState"),
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cUPnPControlPoint(NULL),
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toEnable(false), toStart(false), toStop(false),
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iport(0),eport(0), eport_curr(0)
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{
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}
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upnphandler::~upnphandler()
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{
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return;
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}
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/* RsIface */
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void upnphandler::enable(bool active)
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{
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::enable called with argument active : " << active << std::endl;
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std::cerr << "toEnable : " << toEnable << std::endl;
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std::cerr << "toStart : " << toStart << std::endl;
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#endif
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dataMtx.lock(); /*** LOCK MUTEX ***/
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if (active != toEnable)
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{
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if (active)
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{
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toStart = true;
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}
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else
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{
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toStop = true;
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}
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}
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toEnable = active;
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bool start = toStart;
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dataMtx.unlock(); /*** UNLOCK MUTEX ***/
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if (start)
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{
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/* make background thread to startup UPnP */
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background_setup_upnp(true, false);
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}
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}
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void upnphandler::shutdown()
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{
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/* blocking call to shutdown upnp */
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::shutdown() called." << std::endl;
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#endif
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shutdown_upnp();
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}
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void upnphandler::restart()
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{
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/* non-blocking call to shutdown upnp, and startup again. */
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#ifdef UPNP_DEBUG
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std::cerr << "upnphandler::restart() called." << std::endl;
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#endif
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background_setup_upnp(true, true);
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}
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bool upnphandler::getEnabled()
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{
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dataMtx.lock(); /*** LOCK MUTEX ***/
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bool on = toEnable;
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dataMtx.unlock(); /*** UNLOCK MUTEX ***/
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return on;
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}
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bool upnphandler::getActive()
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{
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dataMtx.lock(); /*** LOCK MUTEX ***/
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#ifdef UPNP_DEBUG
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std::cerr <<"upnphandler::getActive() result : " << (upnpState == RS_UPNP_S_ACTIVE) << std::endl;
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#endif
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bool on = (upnpState == RS_UPNP_S_ACTIVE);
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dataMtx.unlock(); /*** UNLOCK MUTEX ***/
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return on;
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}
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/* the address that the listening port is on */
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void upnphandler::setInternalPort(unsigned short iport_in)
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{
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dataMtx.lock(); /*** LOCK MUTEX ***/
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if (iport != iport_in)
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{
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iport = iport_in;
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if ((toEnable) &&
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(upnpState == RS_UPNP_S_ACTIVE))
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{
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toStop = true;
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toStart = true;
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}
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}
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dataMtx.unlock(); /*** UNLOCK MUTEX ***/
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}
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void upnphandler::setExternalPort(unsigned short eport_in)
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{
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dataMtx.lock(); /*** LOCK MUTEX ***/
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/* flag both shutdown/start -> for restart */
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if (eport != eport_in)
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{
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eport = eport_in;
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if ((toEnable) &&
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(upnpState == RS_UPNP_S_ACTIVE))
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{
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toStop = true;
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toStart = true;
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}
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}
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dataMtx.unlock(); /*** UNLOCK MUTEX ***/
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}
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/* as determined by uPnP */
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bool upnphandler::getInternalAddress(struct sockaddr_storage &addr)
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{
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dataMtx.lock(); /*** LOCK MUTEX ***/
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bool valid = (upnpState >= RS_UPNP_S_ACTIVE);
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// copy to universal addr.
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sockaddr_storage_clear(addr);
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sockaddr_storage_setipv4(addr, &upnp_iaddr);
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dataMtx.unlock(); /*** UNLOCK MUTEX ***/
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return valid;
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}
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bool upnphandler::getExternalAddress(struct sockaddr_storage &addr)
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{
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std::string externalAdress = cUPnPControlPoint->getExternalAddress();
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if(!externalAdress.empty() && externalAdress != "")
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{
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const char* externalIPAddress = externalAdress.c_str();
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#ifdef UPNP_DEBUG
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std::cerr << " upnphandler::getExternalAddress() : " << externalIPAddress;
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std::cerr << ":" << eport_curr;
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std::cerr << std::endl;
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#endif
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dataMtx.lock(); /*** LOCK MUTEX ***/
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sockaddr_clear(&upnp_eaddr);
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inet_aton(externalIPAddress, &(upnp_eaddr.sin_addr));
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upnp_eaddr.sin_family = AF_INET;
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upnp_eaddr.sin_port = htons(eport_curr);
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// copy to universal addr.
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sockaddr_storage_clear(addr);
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sockaddr_storage_setipv4(addr, &upnp_eaddr);
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dataMtx.unlock(); /*** UNLOCK MUTEX ***/
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return true;
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}
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else
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{
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return false;
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}
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}
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