private bool AddPortMapping(PortMapping portMapping)
{
portMapping.SetMappingStatus(PortMappingStatus.Trying);
String intPortStr = portMapping.LocalPort.ToString();
String intClient = PortMapper.SharedInstance.LocalIPAddress.ToString();
String description = GetPortMappingDescription();
bool done = false;
int attemptCount = 0;
do
{
int udpErrCode = 0;
int tcpErrCode = 0;
bool udpResult = true;
bool tcpResult = true;
UInt16 extPort;
if (portMapping.DesiredExternalPort < (65535 - 40))
{
extPort = (UInt16)(portMapping.DesiredExternalPort + attemptCount);
}
else
{
extPort = (UInt16)(portMapping.DesiredExternalPort - attemptCount);
}
String extPortStr = extPort.ToString();
if ((portMapping.TransportProtocol & PortMappingTransportProtocol.UDP) > 0)
{
ExistingUPnPPortMapping existingPM;
if (existingUPnPPortMappingsUdpDict.TryGetValue(extPort, out existingPM))
{
udpErrCode = 718;
DebugLog.WriteLine("UPnP: AddPortMapping: UDP: mapping already exists");
}
else
{
udpErrCode = MiniUPnP.UPNP_AddPortMapping(urls.controlURL, igddata.ServiceType,
extPortStr, intPortStr, intClient, description, "UDP");
DebugLog.WriteLine("UPnP: AddPortMapping: UDP: result = {0}", udpErrCode);
}
udpResult = (udpErrCode == MiniUPnP.UPNPCOMMAND_SUCCESS);
}
if ((portMapping.TransportProtocol & PortMappingTransportProtocol.TCP) > 0)
{
ExistingUPnPPortMapping existingPM;
if (existingUPnPPortMappingsTcpDict.TryGetValue(extPort, out existingPM))
{
tcpErrCode = 718;
DebugLog.WriteLine("UPnP: AddPortMapping: TCP: mapping already exists");
}
else
{
tcpErrCode = MiniUPnP.UPNP_AddPortMapping(urls.controlURL, igddata.ServiceType,
extPortStr, intPortStr, intClient, description, "TCP");
DebugLog.WriteLine("UPnP: AddPortMapping: TCP: result = {0}", tcpErrCode);
}
tcpResult = (tcpErrCode == MiniUPnP.UPNPCOMMAND_SUCCESS);
}
if (udpResult && !tcpResult)
{
DebugLog.WriteLine("Deleting UDP mapping");
try
{
MiniUPnP.UPNP_DeletePortMapping(urls.controlURL, igddata.ServiceType, extPortStr, "UDP");
}
catch (AccessViolationException)
{
// I have no idea why the above method sometimes throws an AccessException.
// The odd part about it is that it works perfect, except for the stupid exception.
// So the exception can safely be ignored, it just bugs me because it feels like a hack.
DebugLog.WriteLine("Ignoring exception from method MiniUPnP.UPNP_DeletePortMapping");
}
}
if (tcpResult && !udpResult)
{
DebugLog.WriteLine("Deleting TCP mapping");
try
{
MiniUPnP.UPNP_DeletePortMapping(urls.controlURL, igddata.ServiceType, extPortStr, "TCP");
}
catch (AccessViolationException)
{
// I have no idea why the above method sometimes throws an AccessException.
// The odd part about it is that it works perfect, except for the stupid exception.
// So the exception can safely be ignored, it just bugs me because it feels like a hack.
DebugLog.WriteLine("Ignoring exception from method MiniUPnP.UPNP_DeletePortMapping");
}
}
if (udpResult && tcpResult)
{
// All attempted port mappings were successful
portMapping.SetExternalPort(extPort);
portMapping.SetMappingStatus(PortMappingStatus.Mapped);
return(true);
}
attemptCount++;
if (attemptCount >= 10)
{
// We've tried 10 different mappings and still no success
done = true;
}
else if (!udpResult && udpErrCode != 718)
{
// We received non-conflict error
done = true;
}
else if (!tcpResult && tcpErrCode != 718)
{
// We received non-conflict error
done = true;
}
} while (!done);
portMapping.SetMappingStatus(PortMappingStatus.Unmapped);
return(false);
}
private bool ApplyPortMapping(PortMapping portMapping, bool remove, ref NATPMP.natpmp_t natpmp)
{
NATPMP.natpmpresp_t response = new NATPMP.natpmpresp_t();
int r;
Win32.TimeValue timeout = new Win32.TimeValue();
Win32.FileDescriptorSet fds = new Win32.FileDescriptorSet(1);
if (!remove)
{
portMapping.SetMappingStatus(PortMappingStatus.Trying);
}
PortMappingTransportProtocol protocol = portMapping.TransportProtocol;
for (int i = 1; i <= 2; i++)
{
PortMappingTransportProtocol currentProtocol;
if (i == 1)
{
currentProtocol = PortMappingTransportProtocol.UDP;
}
else
{
currentProtocol = PortMappingTransportProtocol.TCP;
}
if (protocol == currentProtocol || protocol == PortMappingTransportProtocol.Both)
{
r = NATPMP.sendnewportmappingrequest(ref natpmp,
(i == 1) ? NATPMP.PROTOCOL_UDP : NATPMP.PROTOCOL_TCP,
portMapping.LocalPort, portMapping.DesiredExternalPort, (uint)(remove ? 0 : 3600));
do
{
fds.Count = 1;
fds.Array[0] = (IntPtr)natpmp.s;
NATPMP.getnatpmprequesttimeout(ref natpmp, ref timeout);
Win32.select(0, ref fds, IntPtr.Zero, IntPtr.Zero, ref timeout);
r = NATPMP.readnatpmpresponseorretry(ref natpmp, ref response);
}while(r == NATPMP.ERR_TRYAGAIN);
if (r < 0)
{
portMapping.SetMappingStatus(PortMappingStatus.Unmapped);
return(false);
}
}
}
if (remove)
{
portMapping.SetMappingStatus(PortMappingStatus.Unmapped);
}
else
{
updateInterval = Math.Min(updateInterval, response.pnu_newportmapping.lifetime / 2);
if (updateInterval < 60)
{
DebugLog.WriteLine("NAT-PMP: ApplyPortMapping: Caution - new port mapping had a lifetime < 120 ({0})",
response.pnu_newportmapping.lifetime);
updateInterval = 60;
}
portMapping.SetExternalPort(response.pnu_newportmapping.mappedpublicport);
portMapping.SetMappingStatus(PortMappingStatus.Mapped);
}
return(true);
}