/// <summary>
/// Forwards the traffic from unicast to unicast/multicast for the given trafficType
/// </summary>
public void Start()
{
int size = 0;
TrafficType traffTypes;
lock (ThreadTypeData)
{
if (idxThreadTypeData < ThreadTypeData.Length)
{
traffTypes = ThreadTypeData[idxThreadTypeData];
Thread.CurrentThread.Name = "Reflector_UCtoUCMC_" + traffTypes.ToString();
idxThreadTypeData++;
}
else
{
throw new Exception(Strings.CreatedThreadsExceedThreadTypesDefined);
}
}
#region Assigning appropriate sockets to "(mc/uc)(Ref/Srv)Sock"
// The Ref(erence) socket variables are assigned to the socket protocol that this thread is not listening on
// but may use for inter-protocol communication. For example if mcSrvSock is an IPv4 socket, mcRefSock would be
// an IPv6 socket and vice versa.
Socket mcRefSock = null;
Socket ucRefSock = null;
Socket ucSrvSock = null;
int ucPort = 0;
EndPoint remoteEP = null;
switch (traffTypes)
{
case TrafficType.IPv4RTCP:
ucPort = ReflectorMgr.ReflectorUnicastRTPListenPort + 1;
remoteEP = new IPEndPoint(IPAddress.Any, 0);
mcRefSock = ReflectorMgr.Sockets.SockMCv6RTCP;
ucRefSock = ReflectorMgr.Sockets.SockUCv6RTCP;
ucSrvSock = ReflectorMgr.Sockets.SockUCv4RTCP;
break;
case TrafficType.IPv6RTCP:
ucPort = ReflectorMgr.ReflectorUnicastRTPListenPort + 1;
remoteEP = new IPEndPoint(IPAddress.IPv6Any, 0);
mcRefSock = ReflectorMgr.Sockets.SockMCv4RTCP;
ucRefSock = ReflectorMgr.Sockets.SockUCv4RTCP;
ucSrvSock = ReflectorMgr.Sockets.SockUCv6RTCP;
break;
case TrafficType.IPv4RTP:
ucPort = ReflectorMgr.ReflectorUnicastRTPListenPort;
remoteEP = new IPEndPoint(IPAddress.Any, 0);
mcRefSock = ReflectorMgr.Sockets.SockMCv6RTP;
ucRefSock = ReflectorMgr.Sockets.SockUCv6RTP;
ucSrvSock = ReflectorMgr.Sockets.SockUCv4RTP;
break;
case TrafficType.IPv6RTP:
ucPort = ReflectorMgr.ReflectorUnicastRTPListenPort;
remoteEP = new IPEndPoint(IPAddress.IPv6Any, 0);
mcRefSock = ReflectorMgr.Sockets.SockMCv4RTP;
ucRefSock = ReflectorMgr.Sockets.SockUCv4RTP;
ucSrvSock = ReflectorMgr.Sockets.SockUCv6RTP;
break;
default:
Debug.Assert(false);
throw new ArgumentException(Strings.InvalidTrafficTypeCombination);
}
#endregion
IPEndPoint groupEP = null;
byte [] buf = new byte[1500];
IList <IPEndPoint> members = new List <IPEndPoint>();
while (true)
{
try
{
//EndPoint ep = null;
size = ucSrvSock.ReceiveFrom(buf, ref remoteEP);
// First, check whether this is a control message (JOIN or LEAVE)
if (size <= 50)
{
try
{
UdpReflectorMessage message = new UdpReflectorMessage(buf, size);
registrar.ProcessMessage(message, remoteEP as IPEndPoint, ucSrvSock);
continue; // read next message
}
catch (InvalidUdpReflectorMessage)
{
// fall through
}
}
if ((traffTypes & TrafficType.RTP) == TrafficType.RTP)
{
ReflectorMgr.PC[ReflectorPC.ID.UnicastPacketsReceived]++;
}
ClientEntry entry = registrar.GetEntry(remoteEP as IPEndPoint);
if (entry != null)
{
registrar.MarkAsActive(entry);
// Make sure this node isn't also sending over multicast...
if (registrar.IsIPAddressUsingMulticast(entry.ClientEP.Address))
{
eventLog.WriteEntry("Warning: receving both unicast and multicast from: " + entry.ClientEP.Address,
EventLogEntryType.Warning, (int)ReflectorEventLog.ID.UCtoUCMCException);
continue; // read next message without propogating further...
}
// lookup the (first) group which this client is a member of that group.
groupEP = entry.GroupEP;
// Find the other members of the group
registrar.MemberLookup(members, groupEP);
// Send the data to the Multicast side
if (SendMulticast)
{
if (groupEP.AddressFamily == ucSrvSock.AddressFamily)
{
ucSrvSock.SendTo(buf, 0, size, SocketFlags.None, groupEP);
}
else if ((mcRefSock != null) && (groupEP.AddressFamily == ucRefSock.AddressFamily))
{
ucRefSock.SendTo(buf, 0, size, SocketFlags.None, groupEP);
}
}
// Send the data to all unicast client members except the sender.
for (int i = 0; i < members.Count; i++)
{
if (!remoteEP.Equals(members[i]))
{
if (members[i].AddressFamily == ucSrvSock.AddressFamily)
{
ucSrvSock.SendTo(buf, 0, size, SocketFlags.None, members[i]);
}
else if ((ucRefSock != null) && (members[i].AddressFamily == ucRefSock.AddressFamily))
{
ucRefSock.SendTo(buf, 0, size, SocketFlags.None, members[i]);
}
}
}
if ((traffTypes & TrafficType.RTP) == TrafficType.RTP)
{
ReflectorMgr.PC[ReflectorPC.ID.UCtoUCPacketsSent] += members.Count - 1;
}
}
}
// On stopping the service, avoid the AbortException written in the event viewer
catch (ThreadAbortException) {}
catch (Exception e) // Connection reset by peer! this happens occasionally when a UC client leaves.
{
eventLog.WriteEntry(string.Format(CultureInfo.CurrentCulture, Strings.UCtoUCMCForwarderException,
traffTypes, remoteEP, e.ToString()), EventLogEntryType.Warning, (int)ReflectorEventLog.ID.UCtoUCMCException);
}
}
}
