i2pd/daemon/UPnP.cpp
2021-02-25 00:37:41 +03:00

267 lines
7.0 KiB
C++

#ifdef USE_UPNP
#include <string>
#include <thread>
#include <boost/thread/thread.hpp>
#include <boost/asio.hpp>
#include "Log.h"
#include "RouterContext.h"
#include "UPnP.h"
#include "NetDb.hpp"
#include "util.h"
#include "RouterInfo.h"
#include "Config.h"
#include <miniupnpc/miniupnpc.h>
#include <miniupnpc/upnpcommands.h>
namespace i2p
{
namespace transport
{
UPnP::UPnP () : m_IsRunning(false), m_Thread (nullptr), m_Timer (m_Service)
{
}
void UPnP::Stop ()
{
if (m_IsRunning)
{
LogPrint(eLogInfo, "UPnP: stopping");
m_IsRunning = false;
m_Timer.cancel ();
m_Service.stop ();
if (m_Thread)
{
m_Thread->join ();
m_Thread.reset (nullptr);
}
CloseMapping ();
Close ();
}
}
void UPnP::Start()
{
m_IsRunning = true;
LogPrint(eLogInfo, "UPnP: starting");
m_Service.post (std::bind (&UPnP::Discover, this));
std::unique_lock<std::mutex> l(m_StartedMutex);
m_Thread.reset (new std::thread (std::bind (&UPnP::Run, this)));
m_Started.wait_for (l, std::chrono::seconds (5)); // 5 seconds maximum
}
UPnP::~UPnP ()
{
Stop ();
}
void UPnP::Run ()
{
i2p::util::SetThreadName("UPnP");
while (m_IsRunning)
{
try
{
m_Service.run ();
// Discover failed
break; // terminate the thread
}
catch (std::exception& ex)
{
LogPrint (eLogError, "UPnP: runtime exception: ", ex.what ());
PortMapping ();
}
}
}
void UPnP::Discover ()
{
bool isError;
int err;
#if ((MINIUPNPC_API_VERSION >= 8) || defined (UPNPDISCOVER_SUCCESS))
err = UPNPDISCOVER_SUCCESS;
#if (MINIUPNPC_API_VERSION >= 14)
m_Devlist = upnpDiscover (UPNP_RESPONSE_TIMEOUT, NULL, NULL, 0, 0, 2, &err);
#else
m_Devlist = upnpDiscover (UPNP_RESPONSE_TIMEOUT, NULL, NULL, 0, 0, &err);
#endif
isError = err != UPNPDISCOVER_SUCCESS;
#else // MINIUPNPC_API_VERSION >= 8
err = 0;
m_Devlist = upnpDiscover (UPNP_RESPONSE_TIMEOUT, NULL, NULL, 0);
isError = m_Devlist == NULL;
#endif // MINIUPNPC_API_VERSION >= 8
{
// notify starting thread
std::unique_lock<std::mutex> l(m_StartedMutex);
m_Started.notify_all ();
}
if (isError)
{
LogPrint (eLogError, "UPnP: unable to discover Internet Gateway Devices: error ", err);
return;
}
err = UPNP_GetValidIGD (m_Devlist, &m_upnpUrls, &m_upnpData, m_NetworkAddr, sizeof (m_NetworkAddr));
m_upnpUrlsInitialized=err!=0;
if (err == UPNP_IGD_VALID_CONNECTED)
{
err = UPNP_GetExternalIPAddress (m_upnpUrls.controlURL, m_upnpData.first.servicetype, m_externalIPAddress);
if(err != UPNPCOMMAND_SUCCESS)
{
LogPrint (eLogError, "UPnP: unable to get external address: error ", err);
return;
}
else
{
LogPrint (eLogError, "UPnP: found Internet Gateway Device ", m_upnpUrls.controlURL);
if (!m_externalIPAddress[0])
{
LogPrint (eLogError, "UPnP: found Internet Gateway Device doesn't know our external address");
return;
}
}
}
else
{
LogPrint (eLogError, "UPnP: unable to find valid Internet Gateway Device: error ", err);
return;
}
// UPnP discovered
LogPrint (eLogDebug, "UPnP: ExternalIPAddress is ", m_externalIPAddress);
i2p::context.UpdateAddress (boost::asio::ip::address::from_string (m_externalIPAddress));
// port mapping
PortMapping ();
}
int UPnP::CheckMapping (const char* port, const char* type)
{
int err = UPNPCOMMAND_SUCCESS;
#if (MINIUPNPC_API_VERSION >= 10)
err = UPNP_GetSpecificPortMappingEntry(m_upnpUrls.controlURL, m_upnpData.first.servicetype, port, type, NULL, NULL, NULL, NULL, NULL, NULL);
#elif ((MINIUPNPC_API_VERSION >= 8) || defined (UPNPDISCOVER_SUCCESS))
err = UPNP_GetSpecificPortMappingEntry(m_upnpUrls.controlURL, m_upnpData.first.servicetype, port, type, NULL, NULL, NULL, NULL, NULL);
#else
err = UPNP_GetSpecificPortMappingEntry(m_upnpUrls.controlURL, m_upnpData.first.servicetype, port, type, NULL, NULL);
#endif
return err;
}
void UPnP::PortMapping ()
{
const auto& a = context.GetRouterInfo().GetAddresses();
for (const auto& address : a)
{
if (!address->host.is_v6 () && address->port)
TryPortMapping (address);
}
m_Timer.expires_from_now (boost::posix_time::minutes(20)); // every 20 minutes
m_Timer.async_wait ([this](const boost::system::error_code& ecode)
{
if (ecode != boost::asio::error::operation_aborted)
PortMapping ();
});
}
void UPnP::TryPortMapping (std::shared_ptr<i2p::data::RouterInfo::Address> address)
{
std::string strType (GetProto (address)), strPort (std::to_string (address->port));
std::string strDesc; i2p::config::GetOption("upnp.name", strDesc);
int err = UPNPCOMMAND_SUCCESS;
// check for existing mapping
err = CheckMapping (strPort.c_str (), strType.c_str ());
if (err != UPNPCOMMAND_SUCCESS) // if mapping not found
{
LogPrint (eLogDebug, "UPnP: possibly port ", strPort, " is not forwarded: return code ", err);
#if ((MINIUPNPC_API_VERSION >= 8) || defined (UPNPDISCOVER_SUCCESS))
err = UPNP_AddPortMapping (m_upnpUrls.controlURL, m_upnpData.first.servicetype, strPort.c_str (), strPort.c_str (), m_NetworkAddr, strDesc.c_str (), strType.c_str (), NULL, NULL);
#else
err = UPNP_AddPortMapping (m_upnpUrls.controlURL, m_upnpData.first.servicetype, strPort.c_str (), strPort.c_str (), m_NetworkAddr, strDesc.c_str (), strType.c_str (), NULL);
#endif
if (err != UPNPCOMMAND_SUCCESS)
{
LogPrint (eLogError, "UPnP: port forwarding to ", m_NetworkAddr, ":", strPort, " failed: return code ", err);
return;
}
else
{
LogPrint (eLogInfo, "UPnP: port successfully forwarded (", m_externalIPAddress ,":", strPort, " type ", strType, " -> ", m_NetworkAddr ,":", strPort ,")");
return;
}
}
else
{
LogPrint (eLogDebug, "UPnP: external forward from ", m_NetworkAddr, ":", strPort, " exists on current Internet Gateway Device");
return;
}
}
void UPnP::CloseMapping ()
{
const auto& a = context.GetRouterInfo().GetAddresses();
for (const auto& address : a)
{
if (!address->host.is_v6 () && address->port)
CloseMapping (address);
}
}
void UPnP::CloseMapping (std::shared_ptr<i2p::data::RouterInfo::Address> address)
{
if(!m_upnpUrlsInitialized) {
return;
}
std::string strType (GetProto (address)), strPort (std::to_string (address->port));
int err = UPNPCOMMAND_SUCCESS;
err = CheckMapping (strPort.c_str (), strType.c_str ());
if (err == UPNPCOMMAND_SUCCESS)
{
err = UPNP_DeletePortMapping (m_upnpUrls.controlURL, m_upnpData.first.servicetype, strPort.c_str (), strType.c_str (), NULL);
LogPrint (eLogError, "UPnP: DeletePortMapping() returned : ", err);
}
}
void UPnP::Close ()
{
freeUPNPDevlist (m_Devlist);
m_Devlist = 0;
if(m_upnpUrlsInitialized){
FreeUPNPUrls (&m_upnpUrls);
m_upnpUrlsInitialized=false;
}
}
std::string UPnP::GetProto (std::shared_ptr<i2p::data::RouterInfo::Address> address)
{
switch (address->transportStyle)
{
case i2p::data::RouterInfo::eTransportNTCP:
return "TCP";
break;
case i2p::data::RouterInfo::eTransportSSU:
default:
return "UDP";
}
}
}
}
#else /* USE_UPNP */
namespace i2p {
namespace transport {
}
}
#endif /* USE_UPNP */