public void HandlePacket(SOEClient sender, SOEPacket packet)
{
// Operation
ushort opCode = packet.GetOpCode();
// Security Measure
if (!sender.HasSession())
{
if (opCode != (ushort)SOEOPCodes.SESSION_REQUEST)
{
// We really don't care about this client.
// They can try send stuff as much as possible.
// TODO: Handle this (cuz attacks)
return;
}
}
// Handle!
switch ((SOEOPCodes)opCode)
{
case SOEOPCodes.SESSION_REQUEST:
HandleSessionRequest(sender, packet);
break;
case SOEOPCodes.MULTI:
Console.WriteLine("MULTI!");
// TODO
break;
case SOEOPCodes.DISCONNECT:
HandleDisconnect(sender, packet);
break;
case SOEOPCodes.PING:
HandlePing(sender);
break;
case SOEOPCodes.RELIABLE_DATA:
case SOEOPCodes.FRAGMENTED_RELIABLE_DATA:
case SOEOPCodes.ACK_RELIABLE_DATA:
sender.DataChannel.Receive(packet);
break;
default:
Log("Received Unknown SOEPacket 0x{0:X2}!", packet.GetOpCode());
break;
}
}
public void HandlePacket(SOEClient sender, byte[] rawPacket)
{
// Read the packet
SOEReader reader = new SOEReader(rawPacket);
ushort opCode = reader.ReadUInt16();
bool goodPacket = true;
// Get the packet data
byte[] data = new byte[rawPacket.Length - (int)sender.GetCRCLength()];
for (int i = 0; i < data.Length; i++)
{
data[i] = rawPacket[i];
}
// Get the CRC32 checksum for the packet
uint crc32 = sender.GetCRC32Checksum(data);
// Get our expected CRC32 checksum
uint expectedCRC32 = 0;
uint place = sender.GetCRCLength() - 1;
for (int i = rawPacket.Length - (int)sender.GetCRCLength(); i < rawPacket.Length; i++)
{
expectedCRC32 += (uint)(rawPacket[i] << (8 * (int)place));
place--;
}
// We have our CRCs! Check if the packet is formed correctly!
byte[] crc = BitConverter.GetBytes(crc32).Reverse().ToArray();
byte[] expectedCRC = BitConverter.GetBytes(expectedCRC32).Reverse().ToArray();
int start = 4 - (int)sender.GetCRCLength();
for (int i = start; i < sender.GetCRCLength(); i++)
{
// If they're not the same, we're a bad packet
if (crc[i] != expectedCRC[i])
{
// Set that we're bad, and get outta the loop
goodPacket = false;
break;
}
}
// Are we malformed?
if (!goodPacket)
{
Log("[WARNING] Received malformed packet! Incorrect CRC Appended!");
return;
}
// Remove the CRC
rawPacket = data;
// Do we need to worry about decryption/decompression?
if (sender.HasSession())
{
// Is the client encrypted?
if (sender.IsEncrypted())
{
rawPacket = DecryptPacket(sender, rawPacket);
}
// Is the client compressable?
if (sender.IsCompressable())
{
// It seems that all packets after 0x02 are compressable..
rawPacket = DecompressPacket(sender, rawPacket);
}
}
// Handle the decompressed/decrypted packet!
HandlePacket(sender, new SOEPacket(opCode, rawPacket));
}
public void HandlePacket(SOEClient sender, SOEPacket packet)
{
// Operation
ushort opCode = packet.GetOpCode();
// Security Measure
if (!sender.HasSession())
{
if (opCode != (ushort)SOEOPCodes.SESSION_REQUEST)
{
// We really don't care about this client.
// They can try send stuff as much as possible.
// TODO: Handle this (cuz attacks)
return;
}
}
// Handle!
switch ((SOEOPCodes)opCode)
{
case SOEOPCodes.SESSION_REQUEST:
HandleSessionRequest(sender, packet);
break;
case SOEOPCodes.MULTI:
Console.WriteLine("MULTI!");
// TODO
break;
case SOEOPCodes.DISCONNECT:
HandleDisconnect(sender, packet);
break;
case SOEOPCodes.PING:
HandlePing(sender);
break;
case SOEOPCodes.RELIABLE_DATA:
case SOEOPCodes.FRAGMENTED_RELIABLE_DATA:
case SOEOPCodes.ACK_RELIABLE_DATA:
sender.DataChannel.Receive(packet);
break;
default:
Log("Received Unknown SOEPacket 0x{0:X2}!", packet.GetOpCode());
break;
}
}
public void HandlePacket(SOEClient sender, byte[] rawPacket)
{
// Read the packet
SOEReader reader = new SOEReader(rawPacket);
ushort opCode = reader.ReadUInt16();
bool goodPacket = true;
// Get the packet data
byte[] data = new byte[rawPacket.Length - (int)sender.GetCRCLength()];
for (int i = 0; i < data.Length; i++)
{
data[i] = rawPacket[i];
}
// Get the CRC32 checksum for the packet
uint crc32 = sender.GetCRC32Checksum(data);
// Get our expected CRC32 checksum
uint expectedCRC32 = 0;
uint place = sender.GetCRCLength() - 1;
for (int i = rawPacket.Length - (int)sender.GetCRCLength(); i < rawPacket.Length; i++)
{
expectedCRC32 += (uint)(rawPacket[i] << (8 * (int)place));
place--;
}
// We have our CRCs! Check if the packet is formed correctly!
byte[] crc = BitConverter.GetBytes(crc32).Reverse().ToArray();
byte[] expectedCRC = BitConverter.GetBytes(expectedCRC32).Reverse().ToArray();
int start = 4 - (int)sender.GetCRCLength();
for (int i = start; i < sender.GetCRCLength(); i++)
{
// If they're not the same, we're a bad packet
if (crc[i] != expectedCRC[i])
{
// Set that we're bad, and get outta the loop
goodPacket = false;
break;
}
}
// Are we malformed?
if (!goodPacket)
{
Log("[WARNING] Received malformed packet! Incorrect CRC Appended!");
return;
}
// Remove the CRC
rawPacket = data;
// Do we need to worry about decryption/decompression?
if (sender.HasSession())
{
// Is the client encrypted?
if (sender.IsEncrypted())
{
rawPacket = DecryptPacket(sender, rawPacket);
}
// Is the client compressable?
if (sender.IsCompressable())
{
// It seems that all packets after 0x02 are compressable..
rawPacket = DecompressPacket(sender, rawPacket);
}
}
// Handle the decompressed/decrypted packet!
HandlePacket(sender, new SOEPacket(opCode, rawPacket));
}
