ReadUInt16() public méthode

public ReadUInt16 ( ) : ushort
Résultat ushort
Exemple #1
0
        public void HandleDisconnect(SOEClient sender, SOEPacket packet)
        {
            // Setup a reader
            SOEReader reader = new SOEReader(packet);

            // Get the data from the packet
            uint sessionID = reader.ReadUInt32();
            ushort reason = reader.ReadUInt16();

            // Handle
            if (sessionID == sender.GetSessionID())
            {
                Console.WriteLine("Disconnecting");
                Server.ConnectionManager.DisconnectClient(sender, reason, true);
            }
        }
Exemple #2
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        private void ReceiveMessage(SOEPacket packet)
        {
            SOEReader reader = new SOEReader(packet);

            // Have we received in order?
            ushort sequenceNumber = reader.ReadUInt16();
            if ((sequenceNumber != LastReceivedSequenceNumber + 1) && (sequenceNumber != 0))
            {
                ReceivedSequenceOutOfOrder(sequenceNumber);
                return;
            }

            // Acknowledge
            Acknowledge(sequenceNumber);
            LastReceivedSequenceNumber = sequenceNumber;

            // Get the SOEMessage
            byte[] data = reader.ReadToEnd();

            // Handle!
            Client.ReceiveMessage(data);
        }
Exemple #3
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        private byte[] DecryptPacket(SOEClient sender, byte[] packet)
        {
            // Compressable?
            if (!sender.IsEncrypted())
            {
                return packet;
            }

            // Setup our streams
            SOEReader reader = new SOEReader(packet);
            SOEWriter newPacket = new SOEWriter(reader.ReadUInt16());

            // Skip the compression flag
            reader.ReadByte();

            // Get our data
            int blockCount = (packet.Length - 3) / 4;
            int byteCount = (packet.Length - 3) % 4;
            uint key = sender.GetCRCSeed();

            // Decrypt the blocks of 4 bytes
            for (int i = 0; i < blockCount; i++)
            {
                uint temp = reader.ReadUInt32();
                uint value = temp ^ key;
                key = temp;

                newPacket.AddUInt32(value);
            }

            // Decrypt the rest of the singular bytes
            byte newKey = (byte)((key >> 24) & 0xFF);
            for (int i = 0; i < byteCount; i++)
            {
                byte value = (byte)(reader.ReadByte() ^ newKey);
                newPacket.AddByte(value);
            }

            // Return the decrypted packet
            return newPacket.GetRaw();
        }
Exemple #4
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        private void ReceiveFragment(SOEPacket packet)
        {
            // Setup a reader
            SOEReader reader = new SOEReader(packet);
            reader.ReadUInt16();

            // Have we already started a fragmented packet?
            if (StartedFragmentedPacket)
            {
                // One less fragment till we need to acknowledge!
                FragmentsTillAck--;

                // Get our sequence number
                uint previousFragmentSequenceNumber = FragmentSequenceNumber;
                FragmentSequenceNumber = reader.ReadUInt16();

                // Did we get a correct sequence number?
                if (FragmentSequenceNumber != previousFragmentSequenceNumber + 1)
                {
                    // Out of order!
                    ReceivedSequenceOutOfOrder(FragmentSequenceNumber);
                    return;
                }

                // Append the rest of the packet to the fragmented data
                for (int i = 4; i < FragmentedData.Length; i++)
                {
                    FragmentedData[ReceivedFragmentsSize] = reader.ReadByte();
                    ReceivedFragmentsSize++;
                }
            }
            else
            {
                // We're expecting the starting packet
                FragmentSequenceNumber = reader.ReadUInt16();
                uint totalSize = reader.ReadUInt32();

                // Is this a valid sequence number?
                if ((FragmentSequenceNumber != LastReceivedSequenceNumber + 1) && (FragmentSequenceNumber != 0))
                {
                    // Out of order!
                    ReceivedSequenceOutOfOrder(FragmentSequenceNumber);
                    return;
                }

                // Get the total size
                FragmentedData = new byte[totalSize];

                // How many fragments till we need to acknowledge
                FragmentsTillAck = 4;

                // Append the rest of the packet to the fragmented data
                for (int i = 8; i < FragmentedData.Length; i++)
                {
                    FragmentedData[ReceivedFragmentsSize] = reader.ReadByte();
                    ReceivedFragmentsSize++;
                }

                // Started a fragmented packet
                StartedFragmentedPacket = true;
            }

            // Are we finished with the fragmented data?
            if (ReceivedFragmentsSize >= FragmentedData.Length)
            {
                // Finish fragmented packet
                StartedFragmentedPacket = false;
                FragmentsTillAck = 0;

                // Handle the fragmented packet as a RELIABLE_DATA packet
                SOEWriter writer = new SOEWriter((ushort)SOEOPCodes.RELIABLE_DATA);
                writer.AddBytes(FragmentedData);

                SOEPacket wholePacket = writer.GetFinalSOEPacket(Client, false, false);

                // Receive this packet!
                Receive(wholePacket);
                return;
            }

            // Do we need to acknowledge?
            if (FragmentsTillAck == 0)
            {
                Acknowledge(FragmentSequenceNumber);
                FragmentsTillAck = 5;
            }
        }
Exemple #5
0
        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));
        }