public SimPacket(SimPacketType type, IPEndPoint source, byte[] packet, DhtNetwork dest, TcpConnect tcp, ulong id)
{
Type = type;
Source = source;
Packet = packet;
Dest = dest;
Tcp = tcp;
SenderID = id;
}
public SimPacket(SimPacketType type, IPEndPoint source, byte[] packet, DhtNetwork dest, TcpConnect tcp, ulong id)
{
Type = type;
Source = source;
Packet = packet;
Dest = dest;
Tcp = tcp;
SenderID = id;
}
public int SendPacket(SimPacketType type, DhtNetwork network, byte[] packet, System.Net.IPEndPoint target, TcpConnect tcp)
{
if (type == SimPacketType.Tcp)
{
if (!TcpEndPoints.ContainsKey(target))
{
//this is what actually happens -> throw new Exception("Disconnected");
return(-1);
}
}
if (!UdpEndPoints.ContainsKey(target) ||
!SimMap.ContainsKey(target.Address) ||
!SimMap.ContainsKey(network.Core.Sim.RealIP))
{
return(0);
}
DhtNetwork targetNet = (type == SimPacketType.Tcp) ? TcpEndPoints[target] : UdpEndPoints[target];
if (network.IsLookup != targetNet.IsLookup)
{
Debug.Assert(false);
}
IPEndPoint source = new IPEndPoint(network.Core.Sim.RealIP, 0);
source.Port = (type == SimPacketType.Udp) ? network.UdpControl.ListenPort : network.TcpControl.ListenPort;
SimInstance sourceInstance = SimMap[source.Address];
SimInstance destInstance = SimMap[target.Address];
if (packet != null)
{
sourceInstance.BytesSent += (ulong)packet.Length;
}
// tcp connection must be present to send tcp
if (type == SimPacketType.Tcp)
{
if (!TcpSourcetoDest.SafeContainsKey(tcp))
{
//this is what actually happens -> throw new Exception("Disconnected");
return(-1);
}
}
// add destination to nat table
if (type == SimPacketType.Udp && sourceInstance.RealFirewall == FirewallType.NAT)
{
sourceInstance.NatTable[target] = true;
}
// if destination blocked drop udp / tcp connect requests
if (destInstance.RealFirewall == FirewallType.Blocked)
{
if (type == SimPacketType.Udp || type == SimPacketType.TcpConnect)
{
return(0);
}
}
// if destination natted drop udp (unless in nat table) / tcp connect requests
else if (destInstance.RealFirewall == FirewallType.NAT)
{
if (type == SimPacketType.TcpConnect)
{
return(0);
}
if (type == SimPacketType.Udp && !destInstance.NatTable.ContainsKey(source))
{
return(0);
}
}
// randomly test tcp send buffer full
if (TestTcpFullBuffer)
{
if (type == SimPacketType.Tcp && packet.Length > 4 && RndGen.Next(2) == 1)
{
int newlength = packet.Length / 2;
byte[] newpacket = new byte[newlength];
Buffer.BlockCopy(packet, 0, newpacket, 0, newlength);
packet = newpacket;
}
}
if (packet != null && packet.Length == 0)
{
Debug.Assert(false, "Empty Packet");
}
int index = destInstance.ThreadIndex;
lock (OutPackets[index])
OutPackets[index].Add(new SimPacket(type, source, packet, targetNet, tcp, network.Local.UserID));
if (packet == null)
{
return(0);
}
return(packet.Length);
}
public int SendPacket(SimPacketType type, DhtNetwork network, byte[] packet, System.Net.IPEndPoint target, TcpConnect tcp)
{
if (type == SimPacketType.Tcp)
if (!TcpEndPoints.ContainsKey(target))
{
//this is what actually happens -> throw new Exception("Disconnected");
return -1;
}
if( !UdpEndPoints.ContainsKey(target) ||
!SimMap.ContainsKey(target.Address) ||
!SimMap.ContainsKey(network.Core.Sim.RealIP))
return 0;
DhtNetwork targetNet = (type == SimPacketType.Tcp) ? TcpEndPoints[target] : UdpEndPoints[target];
if (network.IsLookup != targetNet.IsLookup)
Debug.Assert(false);
IPEndPoint source = new IPEndPoint(network.Core.Sim.RealIP, 0);
source.Port = (type == SimPacketType.Udp) ? network.UdpControl.ListenPort : network.TcpControl.ListenPort;
SimInstance sourceInstance = SimMap[source.Address];
SimInstance destInstance = SimMap[target.Address];
if(packet != null)
sourceInstance.BytesSent += (ulong)packet.Length;
// tcp connection must be present to send tcp
if (type == SimPacketType.Tcp)
if( !TcpSourcetoDest.SafeContainsKey(tcp))
{
//this is what actually happens -> throw new Exception("Disconnected");
return -1;
}
// add destination to nat table
if (type == SimPacketType.Udp && sourceInstance.RealFirewall == FirewallType.NAT)
sourceInstance.NatTable[target] = true;
// if destination blocked drop udp / tcp connect requests
if (destInstance.RealFirewall == FirewallType.Blocked)
{
if (type == SimPacketType.Udp || type == SimPacketType.TcpConnect)
return 0;
}
// if destination natted drop udp (unless in nat table) / tcp connect requests
else if (destInstance.RealFirewall == FirewallType.NAT)
{
if (type == SimPacketType.TcpConnect)
return 0;
if (type == SimPacketType.Udp && !destInstance.NatTable.ContainsKey(source) )
return 0;
}
// randomly test tcp send buffer full
if(TestTcpFullBuffer)
if (type == SimPacketType.Tcp && packet.Length > 4 && RndGen.Next(2) == 1)
{
int newlength = packet.Length / 2;
byte[] newpacket = new byte[newlength];
Buffer.BlockCopy(packet, 0, newpacket, 0, newlength);
packet = newpacket;
}
if (packet != null && packet.Length == 0)
Debug.Assert(false, "Empty Packet");
int index = destInstance.ThreadIndex;
lock (OutPackets[index])
OutPackets[index].Add(new SimPacket(type, source, packet, targetNet, tcp, network.Local.UserID));
if (packet == null)
return 0;
return packet.Length;
}
