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Filip Maj 2015-09-25 18:52:25 -04:00
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FFXIVClassic Map Server/packets/SubPacket.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;
using FFXIVClassic_Lobby_Server;
using FFXIVClassic_Lobby_Server.common;
namespace FFXIVClassic_Lobby_Server.packets
{
[StructLayout(LayoutKind.Sequential)]
public struct SubPacketHeader
{
public ushort subpacketSize;
public ushort unknown0; //Always 0x03
public uint sourceId;
public uint targetId;
public uint unknown1;
public ushort unknown4; //Always 0x14
public ushort opcode;
public uint unknown5;
public uint timestamp;
public uint unknown6;
}
public class SubPacket
{
public const int SUBPACKET_SIZE = 0x20;
public SubPacketHeader header;
public byte[] data;
public unsafe SubPacket(byte[] bytes, ref int offset)
{
if (bytes.Length < offset + SUBPACKET_SIZE)
throw new OverflowException("Packet Error: Subpacket was too small");
fixed (byte* pdata = &bytes[offset])
{
header = (SubPacketHeader)Marshal.PtrToStructure(new IntPtr(pdata), typeof(SubPacketHeader));
}
if (bytes.Length < offset + header.subpacketSize)
throw new OverflowException("Packet Error: Subpacket size didn't equal subpacket data");
data = new byte[header.subpacketSize - SUBPACKET_SIZE];
Array.Copy(bytes, offset + SUBPACKET_SIZE, data, 0, data.Length);
offset += header.subpacketSize;
}
public SubPacket(ushort opcode, uint sourceId, uint targetId, byte[] data)
{
this.header = new SubPacketHeader();
header.opcode = opcode;
header.sourceId = sourceId;
header.targetId = targetId;
header.timestamp = Utils.UnixTimeStampUTC();
header.unknown0 = 0x03;
header.unknown1 = 0x00;
header.unknown4 = 0x14;
header.unknown5 = 0x00;
header.unknown6 = 0x00;
this.data = data;
header.subpacketSize = (ushort)(0x20 + data.Length);
}
public byte[] getHeaderBytes()
{
int size = Marshal.SizeOf(header);
byte[] arr = new byte[size];
IntPtr ptr = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(header, ptr, true);
Marshal.Copy(ptr, arr, 0, size);
Marshal.FreeHGlobal(ptr);
return arr;
}
public byte[] getBytes()
{
byte[] outBytes = new byte[header.subpacketSize];
Array.Copy(getHeaderBytes(), 0, outBytes, 0, SUBPACKET_SIZE);
Array.Copy(data, 0, outBytes, SUBPACKET_SIZE, data.Length);
return outBytes;
}
public void debugPrintSubPacket()
{
#if DEBUG
Console.BackgroundColor = ConsoleColor.DarkRed;
Console.WriteLine("Size: 0x{0:X}, Opcode: 0x{1:X}", header.subpacketSize, header.opcode);
Console.WriteLine("{0}", Utils.ByteArrayToHex(getHeaderBytes()));
Console.BackgroundColor = ConsoleColor.DarkMagenta;
Console.WriteLine("{0}", Utils.ByteArrayToHex(data));
Console.BackgroundColor = ConsoleColor.Black;
#endif
}
}
}