public void SendPacket(Packet packet,
Mule.ED2K.ED2KServer pServer,
ushort nSpecialPort, byte[] pInRawPacket, uint nRawLen)
{
// Create raw UDP packet
byte[] pRawPacket;
uint uRawPacketSize;
ushort nPort = 0;
if (packet != null)
{
pRawPacket = new byte[packet.Size + 2];
Array.Copy(packet.UDPHeader, pRawPacket, 2);
Array.Copy(packet.Buffer, 0, pRawPacket, 2, packet.Size);
uRawPacketSize = packet.Size + 2;
if (MuleApplication.Instance.Preference.IsServerCryptLayerUDPEnabled &&
pServer.ServerKeyUDP != 0 &&
pServer.DoesSupportsObfuscationUDP)
{
uRawPacketSize = (uint)EncryptSendServer(ref pRawPacket, (int)uRawPacketSize, pServer.ServerKeyUDP);
nPort = pServer.ObfuscationPortUDP;
}
else
{
nPort = (ushort)(pServer.Port + 4);
}
}
else if (pInRawPacket != null)
{
// we don't encrypt rawpackets (!)
pRawPacket = new byte[nRawLen];
Array.Copy(pInRawPacket, pRawPacket, nRawLen);
uRawPacketSize = nRawLen;
nPort = (ushort)(pServer.Port + 4);
}
else
{
Debug.Assert(false);
return;
}
nPort = (nSpecialPort == 0) ? nPort : nSpecialPort;
Debug.Assert(nPort != 0);
// Do we need to resolve the DN of this server?
IPAddress ipAddr = IPAddress.None;
IPAddress.TryParse(pServer.Address, out ipAddr);
if (ipAddr == IPAddress.None)
{
IPHostEntry hostEntry = Dns.GetHostEntry(pServer.Address);
// Get the IP value
uint nIP = 0;
if (hostEntry != null && hostEntry.AddressList.Length > 0)
{
nIP = BitConverter.ToUInt32(hostEntry.AddressList[0].GetAddressBytes(), 0);
}
if (nIP != 0)
{
bool bRemoveServer = false;
if (!MpdUtilities.IsGoodIP(nIP))
{
// However, if we are currently connected to a "not-good-ip", that IP can't
// be that bad -- may only happen when debugging in a LAN.
ED2KServer pConnectedServer = MuleApplication.Instance.ServerConnect.CurrentServer;
if (pConnectedServer != null || pConnectedServer.IP != nIP)
{
bRemoveServer = true;
}
}
if (!bRemoveServer && MuleApplication.Instance.Preference.IsFilterServerByIP &&
MuleApplication.Instance.IPFilter.IsFiltered(nIP))
{
bRemoveServer = true;
}
ED2KServer pTempServer =
MuleApplication.Instance.ServerList.GetServerByAddress(pServer.Address, pServer.Port);
if (pTempServer != null)
{
pServer.IP = nIP;
// If we already have entries in the server list (dynIP-servers without a DN)
// with the same IP as this dynIP-server, remove the duplicates.
MuleApplication.Instance.ServerList.RemoveDuplicatesByIP(pServer);
}
if (bRemoveServer)
{
return;
}
// Send all of the queued packets for this server.
SendBuffer(nIP, nPort, pRawPacket, uRawPacketSize);
}
}
else
{
// No DNS query needed for this server. Just send the packet.
SendBuffer(BitConverter.ToUInt32(ipAddr.GetAddressBytes(), 0),
nPort, pRawPacket, uRawPacketSize);
}
}