internal static DataCenterAddress ReadAddress(GameBinaryReader reader)
{
var segment = reader.ReadUInt16();
var element = reader.ReadUInt16();
return(new DataCenterAddress(segment, element));
}
internal static PacketHeader ReadHeader(byte[] buffer)
{
using var reader = new GameBinaryReader(buffer);
var length = (ushort)(reader.ReadUInt16() - PacketHeader.HeaderSize);
var code = reader.ReadUInt16();
return(new PacketHeader(length, code));
}
static PacketHeader ReadHeader(GameBinaryReader reader)
{
reader.Position = 0;
var length = (ushort)(reader.ReadUInt16() - PacketHeader.HeaderSize);
var code = reader.ReadUInt16();
return(new PacketHeader(length, code));
}
public PacketLogEntry Read()
{
if (_disposed)
{
throw new ObjectDisposedException(GetType().FullName);
}
try
{
var time = _reader.ReadInt64();
DateTime stamp;
try
{
stamp = DateTimeOffset.FromUnixTimeMilliseconds(time).LocalDateTime;
}
catch (ArgumentOutOfRangeException)
{
throw new InvalidDataException($"Invalid timestamp value {time}.");
}
var id = _reader.ReadInt32();
if (!Servers.ContainsKey(id))
{
throw new InvalidDataException($"Invalid server ID {id}.");
}
var direction = (Direction)_reader.ReadByte();
if (!Enum.IsDefined(typeof(Direction), direction))
{
throw new InvalidDataException($"Unknown direction value {direction}.");
}
var code = _reader.ReadUInt16();
if (!GameMessages.CodeToName.ContainsKey(code))
{
throw new InvalidDataException($"Unknown message code {code}.");
}
var length = _reader.ReadUInt16();
var payload = _reader.ReadBytes(length);
return(new PacketLogEntry(stamp, id, direction, code, payload));
}
catch (EndOfStreamException)
{
return(null);
}
}
public PacketLogReader(string fileName)
{
Stream stream = File.OpenRead(fileName);
using var reader = new GameBinaryReader(stream, true);
if (!reader.ReadBytes(PacketLogEntry.Magic.Count).SequenceEqual(PacketLogEntry.Magic))
{
throw new InvalidDataException("Invalid magic number.");
}
Version = reader.ReadUInt32();
if (Version != PacketLogEntry.Version)
{
throw new InvalidDataException($"Unknown format version {Version}.");
}
Region = (Region)reader.ReadByte();
if (!Enum.IsDefined(typeof(Region), Region))
{
throw new InvalidDataException($"Unknown region value {Region}.");
}
var clientVersion = reader.ReadUInt32();
if (!DataCenter.ClientVersions.Values.Contains(clientVersion))
{
throw new InvalidDataException($"Unknown client version {clientVersion}.");
}
GameMessages = new GameMessageTable(clientVersion);
SystemMessages = new SystemMessageTable(clientVersion);
var serverCount = (int)reader.ReadUInt32();
var servers = new Dictionary <int, ServerInfo>(serverCount);
for (var i = 0; i < serverCount; i++)
{
var id = reader.ReadInt32();
if (servers.ContainsKey(id))
{
throw new InvalidDataException($"Duplicate server ID {id}.");
}
var name = reader.ReadString();
var size = reader.ReadBoolean() ? 16 : 4;
var realIPBytes = reader.ReadBytes(size);
var realPort = reader.ReadUInt16();
var proxyIPBytes = reader.ReadBytes(size);
var proxyPort = reader.ReadUInt16();
IPEndPoint realEP;
try
{
realEP = new IPEndPoint(new IPAddress(realIPBytes), realPort);
}
catch (ArgumentOutOfRangeException)
{
throw new InvalidDataException($"Invalid real port {realPort}.");
}
catch (ArgumentException)
{
throw new InvalidDataException("Invalid real IP address.");
}
IPEndPoint proxyEP;
try
{
proxyEP = new IPEndPoint(new IPAddress(proxyIPBytes), proxyPort);
}
catch (ArgumentOutOfRangeException)
{
throw new InvalidDataException($"Invalid proxy port {proxyPort}.");
}
catch (ArgumentException)
{
throw new InvalidDataException("Invalid proxy IP address.");
}
servers.Add(id, new ServerInfo(id, name, realEP, proxyEP));
}
Servers = servers;
CompressionLevel = reader.ReadByte();
_reader = new GameBinaryReader(CompressionLevel != 0 ?
new FastDeflateStream(stream, CompressionMode.Decompress) : stream);
}
void DeserializeObject(GameBinaryReader reader, object target)
{
foreach (var info in GetPacketInfo(target.GetType()).Fields.Cast <ReflectionPacketFieldInfo>())
{
if (info.IsByteArray)
{
var offset = reader.ReadOffset();
var count = reader.ReadUInt16();
var list = (List <byte>)info.Property.GetValue(target);
list.Clear();
if (count == 0)
{
continue;
}
reader.Seek(offset, (r, op) => list.AddRange(r.ReadBytes(count)));
}
else if (info.IsArray)
{
var count = reader.ReadUInt16();
var offset = reader.ReadOffset();
var list = (IList)info.Property.GetValue(target);
list.Clear();
if (count == 0)
{
continue;
}
var next = offset;
for (var i = 0; i < count; i++)
{
reader.Seek(next, (r, op) =>
{
r.ReadOffset();
next = r.ReadOffset();
var elem = info.ElementConstructor();
DeserializeObject(r, elem);
list.Add(elem);
});
}
}
else if (info.IsString)
{
var offset = reader.ReadOffset();
info.Property.SetValue(target, reader.Seek(offset, (r, op) => r.ReadString()));
}
else
{
var val = info.PrimitiveDeserializer(reader);
info.EnumValidator?.Invoke(val);
info.Property.SetValue(target, val);
}
}
}
public static IEnumerable <PotentialArray> FindArrays(ReadOnlyMemory <byte> payload)
{
using var reader = new GameBinaryReader(payload.GetArray());
for (var i = 0; i < reader.Length; i++)
{
reader.Position = i;
if (!reader.CanRead(sizeof(ushort) * 2))
{
break;
}
var countPos = reader.Position;
var count = reader.ReadUInt16();
var offsetPos = reader.Position;
var offset = reader.ReadOffset();
if (count == 0 || (count * (sizeof(ushort) * 2 + sizeof(byte)) + sizeof(ushort) * 2) > reader.Length)
{
continue;
}
var positions = new HashSet <int>
{
countPos,
countPos + sizeof(byte),
offsetPos,
offsetPos + sizeof(byte),
};
var elems = new List <PotentialArrayElement>();
var good = true;
var last = offsetPos;
var next = offset;
while (next != -PacketHeader.HeaderSize)
{
if (!(good = next >= 0 && next > last && next <= reader.Length - sizeof(ushort) * 2 - sizeof(byte)))
{
break;
}
last = next + sizeof(ushort) * 2;
reader.Position = next;
var herePos = reader.Position;
var here = reader.ReadOffset();
if (!(good = here == herePos && here == next && positions.Add(herePos) && positions.Add(herePos + sizeof(byte))))
{
break;
}
var nextPos = reader.Position;
next = reader.ReadOffset();
if (!(good = positions.Add(nextPos) && positions.Add(nextPos + sizeof(byte))))
{
break;
}
elems.Add(new PotentialArrayElement(here, nextPos, next == -PacketHeader.HeaderSize ? 0 : next));
}
if (good && elems.Count == count)
{
yield return(new PotentialArray(countPos, count, offsetPos, offset, elems));
}
}
}
public PacketLogReader(string fileName)
{
Stream stream = File.OpenRead(fileName);
var magic = new byte[PacketLogEntry.Magic.Count];
if (stream.Read(magic, 0, magic.Length) != magic.Length)
{
throw new EndOfStreamException();
}
if (!magic.SequenceEqual(PacketLogEntry.Magic))
{
throw new InvalidDataException();
}
var level = stream.ReadByte();
if (level == -1)
{
throw new EndOfStreamException();
}
if ((CompressionLevel = (byte)level) != 0)
{
stream = new DeflateStream(stream, CompressionMode.Decompress);
}
_reader = new GameBinaryReader(stream);
Version = _reader.ReadUInt32();
if (Version != PacketLogEntry.Version)
{
throw new InvalidDataException();
}
Region = (Region)_reader.ReadByte();
if (!Enum.IsDefined(typeof(Region), Region))
{
throw new InvalidDataException();
}
var clientVersion = _reader.ReadUInt32();
if (!DataCenter.Versions.Values.Contains(clientVersion))
{
throw new InvalidDataException();
}
GameMessages = new GameMessageTable(clientVersion);
SystemMessages = new SystemMessageTable(clientVersion);
var serverCount = (int)_reader.ReadUInt32();
if (serverCount < 0)
{
throw new InvalidDataException();
}
var servers = new Dictionary <int, ServerInfo>(serverCount);
for (var i = 0; i < serverCount; i++)
{
var id = _reader.ReadInt32();
if (servers.ContainsKey(id))
{
throw new InvalidDataException();
}
var name = _reader.ReadString();
var size = _reader.ReadBoolean() ? 16 : 4;
var realIPBytes = _reader.ReadBytes(size);
var realPort = _reader.ReadUInt16();
var proxyIPBytes = _reader.ReadBytes(size);
var proxyPort = _reader.ReadUInt16();
IPEndPoint realEP;
IPEndPoint proxyEP;
try
{
realEP = new IPEndPoint(new IPAddress(realIPBytes), realPort);
proxyEP = new IPEndPoint(new IPAddress(proxyIPBytes), proxyPort);
}
catch (ArgumentException)
{
throw new InvalidDataException();
}
servers.Add(id, new ServerInfo(id, name, realEP, proxyEP));
}
Servers = servers;
}