public override bool Send(IPPayload payload)
{
lock (deathClock)
{
deathClock.Restart();
}
UDP udp = (UDP)payload;
if (destPort != 0)
{
//client already created
if (!(udp.DestinationPort == destPort && udp.SourcePort == srcPort))
{
Log_Error("UDP packet invalid for current session (Duplicate key?)");
return(false);
}
}
else
{
//create client
destPort = udp.DestinationPort;
srcPort = udp.SourcePort;
//Multicast address start with 0b1110
if ((DestIP[0] & 0xF0) == 0xE0)
{
isMulticast = true;
}
client = new UdpClient();
client.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
client.Client.Bind(new IPEndPoint(adapterIP, 0));
//needs testing
if (isMulticast)
{
Log_Info("Is Multicast");
//client.JoinMulticastGroup(address);
}
else
{
IPAddress address = new IPAddress(DestIP);
client.Connect(address, destPort);
}
if (srcPort != 0)
{
open = true;
}
}
if (destPort == 53)
{
Log_Info("DNS Packet Sent To " + new IPAddress(DestIP));
Log_Info("Contents");
PacketReader.DNS.DNS pDNS = new PacketReader.DNS.DNS(udp.GetPayload());
}
if (isBroadcast)
{
client.Send(udp.GetPayload(), udp.GetPayload().Length, new IPEndPoint(IPAddress.Broadcast, destPort));
}
else if (isMulticast | isFixedPort)
{
client.Send(udp.GetPayload(), udp.GetPayload().Length, new IPEndPoint(new IPAddress(DestIP), destPort));
}
else if (isFixedPort)
{
client.Send(udp.GetPayload(), udp.GetPayload().Length);
}
else
{
//As fair as I know,
//this won't throw a 10061 Connection refused or 10054 Connection reset
//under any probable event on windows (As much as I've tried)
//Yet it can throw 10061 on linux
try
{
client.Send(udp.GetPayload(), udp.GetPayload().Length);
}
catch (SocketException err)
{
if (!hasRetryed)
{
Log_Error("UDP Send Error: " + err.Message);
Log_Error("Error Code: " + err.ErrorCode);
Log_Error("Hiding further errors from this connection");
hasRetryed = true;
}
client.Close();
//recreate UDP client
IPAddress address = new IPAddress(DestIP);
client = new UdpClient();
client.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
client.Client.Bind(new IPEndPoint(adapterIP, 0));
client.Connect(address, destPort);
//And retry sending
client.Send(udp.GetPayload(), udp.GetPayload().Length);
}
}
if (srcPort == 0)
{
RaiseEventConnectionClosed();
}
return(true);
}
//bool thing = false;
public override IPPayload Recv()
{
if (!open)
{
return(null);
}
if (isFixedPort)
{
lock (deathClock)
{
if (deathClock.Elapsed.TotalSeconds > MAX_IDLE)
{
Dispose();
RaiseEventConnectionClosed();
}
}
return(null);
}
bool hasData;
//client may be disposed when we try to check
//available data on a rejected connection
try
{
hasData = client.Available != 0;
}
catch (ObjectDisposedException)
{
hasData = false;
}
if (hasData)
{
IPEndPoint remoteIPEndPoint;
//this isn't a filter
remoteIPEndPoint = new IPEndPoint(IPAddress.Any, 0);
byte[] recived = null;
try
{
recived = client.Receive(ref remoteIPEndPoint);
Log_Verb("Got Data");
}
catch (SocketException err)
{
Log_Error("UDP Recv Error: " + err.Message);
Log_Error("Error Code: " + err.ErrorCode);
RaiseEventConnectionClosed();
return(null);
}
UDP iRet = new UDP(recived)
{
DestinationPort = srcPort,
SourcePort = destPort
};
if (isMulticast)
{
Log_Error(remoteIPEndPoint.ToString());
DestIP = remoteIPEndPoint.Address.GetAddressBytes(); //assumes ipv4
iRet.SourcePort = (UInt16)remoteIPEndPoint.Port;
}
lock (deathClock)
{
deathClock.Restart();
}
if (destPort == 53)
{
Log_Info("DNS Packet Sent From " + remoteIPEndPoint.Address);
Log_Info("Contents");
PacketReader.DNS.DNS pDNS = new PacketReader.DNS.DNS(recived);
}
return(iRet);
}
lock (deathClock)
{
if (deathClock.Elapsed.TotalSeconds > MAX_IDLE)
{
Dispose();
RaiseEventConnectionClosed();
}
}
return(null);
}
public override bool Send(IPPayload payload)
{
lock (deathClock)
{
deathClock.Restart();
}
UDP udp = (UDP)payload;
if (destPort != 0)
{
//client already created
if (!(udp.DestinationPort == destPort && udp.SourcePort == srcPort))
{
Log_Error("UDP packet invalid for current session (Duplicate key?)");
return(false);
}
}
else
{
//create client
destPort = udp.DestinationPort;
srcPort = udp.SourcePort;
//Multicast address start with 0b1110
if ((DestIP[0] & 0xF0) == 0xE0)
{
isMulticast = true;
}
//needs testing
if (isMulticast)
{
Log_Info("Is Multicast");
client = new UdpClient(new IPEndPoint(adapterIP, 0));
//client.JoinMulticastGroup(address);
}
else
{
IPAddress address = new IPAddress(DestIP);
client = new UdpClient(new IPEndPoint(adapterIP, 0));
client.Connect(address, destPort);
}
if (srcPort != 0)
{
open = true;
}
}
if (destPort == 53)
{
Log_Info("DNS Packet Sent To " + new IPAddress(DestIP));
Log_Info("Contents");
PacketReader.DNS.DNS pDNS = new PacketReader.DNS.DNS(udp.GetPayload());
}
if (isBroadcast)
{
client.Send(udp.GetPayload(), udp.GetPayload().Length, new IPEndPoint(IPAddress.Broadcast, destPort));
}
else if (isMulticast | isFixedPort)
{
client.Send(udp.GetPayload(), udp.GetPayload().Length, new IPEndPoint(new IPAddress(DestIP), destPort));
}
else
{
client.Send(udp.GetPayload(), udp.GetPayload().Length);
}
if (srcPort == 0)
{
RaiseEventConnectionClosed();
}
return(true);
}
