void DumpUDPPacket(UDPHeader pkt) {
Console.WriteLine("-- UDP Packet Dump --");
int num_cols = 10;
for (int pos=0; pos < pkt.payloadLength;pos += num_cols) {
// write hex values
for (int col = 0; col < num_cols; col++) {
if (pos+col < pkt.payloadLength) {
Console.Write("{0:X2} ",pkt.Data[pos+col]);
} else {
Console.Write(" ");
}
}
// write ASCII values
Console.Write(" ");
for (int col = 0; col < num_cols; col++) {
if (pos+col < pkt.payloadLength) {
var val = pkt.Data[pos+col];
if (val > 31 && val < 127) {
Console.Write("{0} ", (char)val);
} else {
Console.Write(". ");
}
} else {
Console.Write(" ");
}
}
Console.WriteLine("");
}
}
private void ParseData(byte[] byteData, int nReceived)
{
//Since all protocol packets are encapsulated in the IP datagram
//so we start by parsing the IP header and see what protocol data
//is being carried by it
IPHeader ipHeader = new IPHeader(byteData, nReceived);
// TODO: make this packet capture + event delivery configurable instead of hardcoded
//Now according to the protocol being carried by the IP datagram we parse
//the data field of the datagram
switch (ipHeader.ProtocolType)
{
case Protocol.TCP:
break; // skip TCP packets.
case Protocol.UDP:
// IPHeader.Data stores the data being carried by the IP datagram
UDPHeader udpHeader =
new UDPHeader(ipHeader.Data, (int)ipHeader.MessageLength);
var ports = new HashSet<string> { "5055", "5056" };
if (ports.Contains(udpHeader.DestinationPort) || ports.Contains(udpHeader.SourcePort))
{
// Console.WriteLine("Albion packet received .. size = " + udpHeader.payloadLength.ToString());
// DumpRawPacket(byteData, nReceived);
DumpUDPPacket(udpHeader);
// Albion Photon Data
PacketEvent_Info?.Invoke(String.Format("-- Albion UDP Packet, size={0}", ipHeader.MessageLength));
PacketEvent_UDP?.Invoke(udpHeader);
} else if (udpHeader.DestinationPort == "53" || udpHeader.SourcePort == "53") {
// If the port is equal to 53 then the underlying protocol is DNS
// Note: DNS can use either TCP or UDP thats why the check is done twice
// PacketEvent_Info?.Invoke(String.Format("UDP DNS Packet, size={0}", udpHeader.payloadLength));
}
break;
case Protocol.Unknown:
break;
}
}
