mirror of
https://bitbucket.org/Ioncannon/project-meteor-server.git
synced 2025-04-20 11:47:48 +00:00
361 lines
No EOL
13 KiB
C#
361 lines
No EOL
13 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Runtime.InteropServices;
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using NLog;
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using NLog.Targets;
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namespace FFXIVClassic.Common
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{
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[StructLayout(LayoutKind.Sequential)]
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public struct BasePacketHeader
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{
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public byte isAuthenticated;
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public byte isCompressed;
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public ushort connectionType;
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public ushort packetSize;
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public ushort numSubpackets;
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public ulong timestamp; //Miliseconds
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}
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public class BasePacket
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{
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public const int TYPE_ZONE = 1;
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public const int TYPE_CHAT = 2;
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public const int BASEPACKET_SIZE = 0x10;
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private static readonly Logger logger = LogManager.GetCurrentClassLogger();
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public byte[] data;
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public BasePacketHeader header;
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//Loads a sniffed packet from a file
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public unsafe BasePacket(string path)
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{
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var bytes = File.ReadAllBytes(path);
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if (bytes.Length < BASEPACKET_SIZE)
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throw new OverflowException("Packet Error: Packet was too small");
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fixed (byte* pdata = &bytes[0])
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{
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header = (BasePacketHeader) Marshal.PtrToStructure(new IntPtr(pdata), typeof(BasePacketHeader));
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}
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if (bytes.Length < header.packetSize)
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throw new OverflowException("Packet Error: Packet size didn't equal given size");
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int packetSize = header.packetSize;
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if (packetSize - BASEPACKET_SIZE != 0)
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{
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data = new byte[packetSize - BASEPACKET_SIZE];
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Array.Copy(bytes, BASEPACKET_SIZE, data, 0, packetSize - BASEPACKET_SIZE);
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}
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else
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data = new byte[0];
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}
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//Loads a sniffed packet from a byte array
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public unsafe BasePacket(byte[] bytes)
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{
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if (bytes.Length < BASEPACKET_SIZE)
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throw new OverflowException("Packet Error: Packet was too small");
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fixed (byte* pdata = &bytes[0])
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{
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header = (BasePacketHeader) Marshal.PtrToStructure(new IntPtr(pdata), typeof(BasePacketHeader));
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}
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if (bytes.Length < header.packetSize)
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throw new OverflowException("Packet Error: Packet size didn't equal given size");
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int packetSize = header.packetSize;
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data = new byte[packetSize - BASEPACKET_SIZE];
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Array.Copy(bytes, BASEPACKET_SIZE, data, 0, packetSize - BASEPACKET_SIZE);
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}
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public unsafe BasePacket(byte[] bytes, ref int offset)
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{
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if (bytes.Length < offset + BASEPACKET_SIZE)
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throw new OverflowException("Packet Error: Packet was too small");
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fixed (byte* pdata = &bytes[offset])
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{
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header = (BasePacketHeader) Marshal.PtrToStructure(new IntPtr(pdata), typeof(BasePacketHeader));
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}
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int packetSize = header.packetSize;
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if (bytes.Length < offset + header.packetSize)
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throw new OverflowException("Packet Error: Packet size didn't equal given size");
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data = new byte[packetSize - BASEPACKET_SIZE];
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Array.Copy(bytes, offset + BASEPACKET_SIZE, data, 0, packetSize - BASEPACKET_SIZE);
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offset += packetSize;
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}
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public BasePacket(BasePacketHeader header, byte[] data)
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{
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this.header = header;
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this.data = data;
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}
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public List<SubPacket> GetSubpackets()
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{
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var subpackets = new List<SubPacket>(header.numSubpackets);
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var offset = 0;
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while (offset < data.Length)
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subpackets.Add(new SubPacket(data, ref offset));
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return subpackets;
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}
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public static unsafe BasePacketHeader GetHeader(byte[] bytes)
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{
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BasePacketHeader header;
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if (bytes.Length < BASEPACKET_SIZE)
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throw new OverflowException("Packet Error: Packet was too small");
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fixed (byte* pdata = &bytes[0])
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{
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header = (BasePacketHeader) Marshal.PtrToStructure(new IntPtr(pdata), typeof(BasePacketHeader));
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}
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return header;
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}
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public byte[] GetHeaderBytes()
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{
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var size = Marshal.SizeOf(header);
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var arr = new byte[size];
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var ptr = Marshal.AllocHGlobal(size);
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Marshal.StructureToPtr(header, ptr, true);
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Marshal.Copy(ptr, arr, 0, size);
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Marshal.FreeHGlobal(ptr);
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return arr;
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}
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public byte[] GetPacketBytes()
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{
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var outBytes = new byte[header.packetSize];
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Array.Copy(GetHeaderBytes(), 0, outBytes, 0, BASEPACKET_SIZE);
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Array.Copy(data, 0, outBytes, BASEPACKET_SIZE, data.Length);
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return outBytes;
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}
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//Replaces all instances of the sniffed actorID with the given one
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public void ReplaceActorID(uint actorID)
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{
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using (var mem = new MemoryStream(data))
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{
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using (var binWriter = new BinaryWriter(mem))
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{
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using (var binreader = new BinaryReader(mem))
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{
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while (binreader.BaseStream.Position + 4 < data.Length)
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{
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var read = binreader.ReadUInt32();
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if (read == 0x029B2941 || read == 0x02977DC7 || read == 0x0297D2C8 || read == 0x0230d573 ||
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read == 0x23317df || read == 0x23344a3 || read == 0x1730bdb || read == 0x6c)
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//Original ID
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{
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binWriter.BaseStream.Seek(binreader.BaseStream.Position - 0x4, SeekOrigin.Begin);
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binWriter.Write(actorID);
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}
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}
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}
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}
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}
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}
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//Replaces all instances of the sniffed actorID with the given one
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public void ReplaceActorID(uint fromActorID, uint actorID)
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{
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using (var mem = new MemoryStream(data))
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{
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using (var binWriter = new BinaryWriter(mem))
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{
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using (var binreader = new BinaryReader(mem))
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{
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while (binreader.BaseStream.Position + 4 < data.Length)
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{
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var read = binreader.ReadUInt32();
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if (read == fromActorID) //Original ID
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{
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binWriter.BaseStream.Seek(binreader.BaseStream.Position - 0x4, SeekOrigin.Begin);
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binWriter.Write(actorID);
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}
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}
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}
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}
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}
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}
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public void DebugPrintPacket()
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{
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#if DEBUG
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logger.ColorDebug(
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string.Format("IsAuth:{0} IsEncrypted:{1}, Size:0x{2:X}, NumSubpackets:{3}{4}{5}",
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header.isAuthenticated, header.isCompressed, header.packetSize, header.numSubpackets,
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Environment.NewLine, Utils.ByteArrayToHex(GetHeaderBytes())), ConsoleOutputColor.DarkYellow);
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foreach (var sub in GetSubpackets())
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{
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sub.DebugPrintSubPacket();
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}
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#endif
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}
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#region Utility Functions
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public static BasePacket CreatePacket(List<SubPacket> subpackets, bool isAuthed, bool isCompressed)
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{
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//Create Header
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var header = new BasePacketHeader();
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byte[] data = null;
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header.isAuthenticated = isAuthed ? (byte) 1 : (byte) 0;
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header.isCompressed = isCompressed ? (byte) 1 : (byte) 0;
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header.numSubpackets = (ushort) subpackets.Count;
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header.packetSize = BASEPACKET_SIZE;
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header.timestamp = Utils.MilisUnixTimeStampUTC();
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//Get packet size
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foreach (var subpacket in subpackets)
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header.packetSize += subpacket.header.subpacketSize;
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data = new byte[header.packetSize - 0x10];
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//Add Subpackets
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var offset = 0;
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foreach (var subpacket in subpackets)
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{
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var subpacketData = subpacket.GetBytes();
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Array.Copy(subpacketData, 0, data, offset, subpacketData.Length);
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offset += (ushort) subpacketData.Length;
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}
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Debug.Assert(data != null && offset == data.Length && header.packetSize == 0x10 + offset);
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var packet = new BasePacket(header, data);
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return packet;
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}
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public static BasePacket CreatePacket(SubPacket subpacket, bool isAuthed, bool isCompressed)
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{
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//Create Header
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var header = new BasePacketHeader();
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byte[] data = null;
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header.isAuthenticated = isAuthed ? (byte) 1 : (byte) 0;
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header.isCompressed = isCompressed ? (byte) 1 : (byte) 0;
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header.numSubpackets = 1;
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header.packetSize = BASEPACKET_SIZE;
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header.timestamp = Utils.MilisUnixTimeStampUTC();
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//Get packet size
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header.packetSize += subpacket.header.subpacketSize;
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data = new byte[header.packetSize - 0x10];
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//Add Subpackets
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var subpacketData = subpacket.GetBytes();
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Array.Copy(subpacketData, 0, data, 0, subpacketData.Length);
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Debug.Assert(data != null);
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var packet = new BasePacket(header, data);
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return packet;
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}
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public static BasePacket CreatePacket(byte[] data, bool isAuthed, bool isCompressed)
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{
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Debug.Assert(data != null);
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//Create Header
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var header = new BasePacketHeader();
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header.isAuthenticated = isAuthed ? (byte) 1 : (byte) 0;
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header.isCompressed = isCompressed ? (byte) 1 : (byte) 0;
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header.numSubpackets = 1;
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header.packetSize = BASEPACKET_SIZE;
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header.timestamp = Utils.MilisUnixTimeStampUTC();
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//Get packet size
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header.packetSize += (ushort) data.Length;
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var packet = new BasePacket(header, data);
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return packet;
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}
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public static unsafe void EncryptPacket(Blowfish blowfish, BasePacket packet)
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{
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var data = packet.data;
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int size = packet.header.packetSize;
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var offset = 0;
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while (offset < data.Length)
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{
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if (data.Length < offset + SubPacket.SUBPACKET_SIZE)
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throw new OverflowException("Packet Error: Subpacket was too small");
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SubPacketHeader header;
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fixed (byte* pdata = &data[offset])
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{
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header = (SubPacketHeader) Marshal.PtrToStructure(new IntPtr(pdata), typeof(SubPacketHeader));
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}
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if (data.Length < offset + header.subpacketSize)
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throw new OverflowException("Packet Error: Subpacket size didn't equal subpacket data");
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blowfish.Encipher(data, offset + 0x10, header.subpacketSize - 0x10);
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offset += header.subpacketSize;
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}
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}
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public static unsafe void DecryptPacket(Blowfish blowfish, ref BasePacket packet)
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{
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var data = packet.data;
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int size = packet.header.packetSize;
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var offset = 0;
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while (offset < data.Length)
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{
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if (data.Length < offset + SubPacket.SUBPACKET_SIZE)
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throw new OverflowException("Packet Error: Subpacket was too small");
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SubPacketHeader header;
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fixed (byte* pdata = &data[offset])
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{
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header = (SubPacketHeader) Marshal.PtrToStructure(new IntPtr(pdata), typeof(SubPacketHeader));
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}
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if (data.Length < offset + header.subpacketSize)
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throw new OverflowException("Packet Error: Subpacket size didn't equal subpacket data");
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blowfish.Decipher(data, offset + 0x10, header.subpacketSize - 0x10);
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offset += header.subpacketSize;
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}
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}
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#endregion
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}
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public static class LoggerExtensions
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{
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public static void ColorDebug(this Logger logger, string message, ConsoleOutputColor color)
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{
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var logEvent = new LogEventInfo(LogLevel.Debug, logger.Name, message);
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logEvent.Properties["color"] = (int) color;
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logger.Log(logEvent);
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}
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}
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} |