corrade-vassal – Rev 1
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using System;
using System.Collections.Generic;
using System.IO;
namespace mapgenerator
{
/// <summary>
///
/// </summary>
public enum PacketFrequency
{
/// <summary></summary>
Low,
/// <summary></summary>
Medium,
/// <summary></summary>
High
}
/// <summary>
///
/// </summary>
public enum FieldType
{
/// <summary></summary>
U8,
/// <summary></summary>
U16,
/// <summary></summary>
U32,
/// <summary></summary>
U64,
/// <summary></summary>
S8,
/// <summary></summary>
S16,
/// <summary></summary>
S32,
/// <summary></summary>
F32,
/// <summary></summary>
F64,
/// <summary></summary>
LLUUID,
/// <summary></summary>
BOOL,
/// <summary></summary>
LLVector3,
/// <summary></summary>
LLVector3d,
/// <summary></summary>
LLVector4,
/// <summary></summary>
LLQuaternion,
/// <summary></summary>
IPADDR,
/// <summary></summary>
IPPORT,
/// <summary></summary>
Variable,
/// <summary></summary>
Fixed,
/// <summary></summary>
Single,
/// <summary></summary>
Multiple
}
/// <summary>
///
/// </summary>
public class MapField : IComparable
{
/// <summary></summary>
public int KeywordPosition;
/// <summary></summary>
public string Name;
/// <summary></summary>
public FieldType Type;
/// <summary></summary>
public int Count;
/// <summary>
///
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public int CompareTo(object obj)
{
MapField temp = (MapField)obj;
if (this.KeywordPosition > temp.KeywordPosition)
{
return 1;
}
else
{
if(temp.KeywordPosition == this.KeywordPosition)
{
return 0;
}
else
{
return -1;
}
}
}
}
/// <summary>
///
/// </summary>
public class MapBlock : IComparable
{
/// <summary></summary>
public int KeywordPosition;
/// <summary></summary>
public string Name;
/// <summary></summary>
public int Count;
/// <summary></summary>
public List<MapField> Fields;
/// <summary>
///
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public int CompareTo(object obj)
{
MapBlock temp = (MapBlock)obj;
if (this.KeywordPosition > temp.KeywordPosition)
{
return 1;
}
else
{
if(temp.KeywordPosition == this.KeywordPosition)
{
return 0;
}
else
{
return -1;
}
}
}
}
/// <summary>
///
/// </summary>
public class MapPacket
{
/// <summary></summary>
public ushort ID;
/// <summary></summary>
public string Name;
/// <summary></summary>
public PacketFrequency Frequency;
/// <summary></summary>
public bool Trusted;
/// <summary></summary>
public bool Encoded;
/// <summary></summary>
public List<MapBlock> Blocks;
}
/// <summary>
///
/// </summary>
public class ProtocolManager
{
/// <summary></summary>
public Dictionary<FieldType, int> TypeSizes;
/// <summary></summary>
public Dictionary<string, int> KeywordPositions;
/// <summary></summary>
public MapPacket[] LowMaps;
/// <summary></summary>
public MapPacket[] MediumMaps;
/// <summary></summary>
public MapPacket[] HighMaps;
/// <summary>
///
/// </summary>
/// <param name="keywordFile"></param>
/// <param name="mapFile"></param>
/// <param name="client"></param>
public ProtocolManager(string mapFile)
{
// Initialize the map arrays
LowMaps = new MapPacket[65536];
MediumMaps = new MapPacket[256];
HighMaps = new MapPacket[256];
// Build the type size hash table
TypeSizes = new Dictionary<FieldType,int>();
TypeSizes.Add(FieldType.U8, 1);
TypeSizes.Add(FieldType.U16, 2);
TypeSizes.Add(FieldType.U32, 4);
TypeSizes.Add(FieldType.U64, 8);
TypeSizes.Add(FieldType.S8, 1);
TypeSizes.Add(FieldType.S16, 2);
TypeSizes.Add(FieldType.S32, 4);
TypeSizes.Add(FieldType.F32, 4);
TypeSizes.Add(FieldType.F64, 8);
TypeSizes.Add(FieldType.LLUUID, 16);
TypeSizes.Add(FieldType.BOOL, 1);
TypeSizes.Add(FieldType.LLVector3, 12);
TypeSizes.Add(FieldType.LLVector3d, 24);
TypeSizes.Add(FieldType.LLVector4, 16);
TypeSizes.Add(FieldType.LLQuaternion, 16);
TypeSizes.Add(FieldType.IPADDR, 4);
TypeSizes.Add(FieldType.IPPORT, 2);
TypeSizes.Add(FieldType.Variable, -1);
TypeSizes.Add(FieldType.Fixed, -2);
KeywordPositions = new Dictionary<string, int>();
LoadMapFile(mapFile);
}
/// <summary>
///
/// </summary>
/// <param name="command"></param>
/// <returns></returns>
public MapPacket Command(string command)
{
foreach (MapPacket map in HighMaps)
{
if (map != null)
{
if (command == map.Name)
{
return map;
}
}
}
foreach (MapPacket map in MediumMaps)
{
if (map != null)
{
if (command == map.Name)
{
return map;
}
}
}
foreach (MapPacket map in LowMaps)
{
if (map != null)
{
if (command == map.Name)
{
return map;
}
}
}
throw new Exception("Cannot find map for command \"" + command + "\"");
}
/// <summary>
///
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public MapPacket Command(byte[] data)
{
ushort command;
if (data.Length < 5)
{
return null;
}
if (data[4] == 0xFF)
{
if ((byte)data[5] == 0xFF)
{
// Low frequency
command = (ushort)(data[6] * 256 + data[7]);
return Command(command, PacketFrequency.Low);
}
else
{
// Medium frequency
command = (ushort)data[5];
return Command(command, PacketFrequency.Medium);
}
}
else
{
// High frequency
command = (ushort)data[4];
return Command(command, PacketFrequency.High);
}
}
/// <summary>
///
/// </summary>
/// <param name="command"></param>
/// <param name="frequency"></param>
/// <returns></returns>
public MapPacket Command(ushort command, PacketFrequency frequency)
{
switch (frequency)
{
case PacketFrequency.High:
return HighMaps[command];
case PacketFrequency.Medium:
return MediumMaps[command];
case PacketFrequency.Low:
return LowMaps[command];
}
throw new Exception("Cannot find map for command \"" + command + "\" with frequency \"" + frequency + "\"");
}
/// <summary>
///
/// </summary>
public void PrintMap(TextWriter writer)
{
PrintOneMap(writer, LowMaps, "Low ");
PrintOneMap(writer, MediumMaps, "Medium");
PrintOneMap(writer, HighMaps, "High ");
}
/// <summary>
///
/// </summary>
/// <param name="map"></param>
/// <param name="frequency"></param>
private void PrintOneMap(TextWriter writer, MapPacket[] map, string frequency) {
int i;
for (i = 0; i < map.Length; ++i)
{
if (map[i] != null)
{
writer.WriteLine("{0} {1,5} - {2} - {3} - {4}", frequency, i, map[i].Name,
map[i].Trusted ? "Trusted" : "Untrusted",
map[i].Encoded ? "Zerocoded" : "Unencoded");
foreach (MapBlock block in map[i].Blocks)
{
if (block.Count == -1)
{
writer.WriteLine("\t{0,4} {1} (Variable)", block.KeywordPosition, block.Name);
}
else
{
writer.WriteLine("\t{0,4} {1} ({2})", block.KeywordPosition, block.Name, block.Count);
}
foreach (MapField field in block.Fields)
{
writer.WriteLine("\t\t{0,4} {1} ({2} / {3})", field.KeywordPosition, field.Name,
field.Type, field.Count);
}
}
}
}
}
/// <summary>
///
/// </summary>
/// <param name="mapFile"></param>
/// <param name="outputFile"></param>
public static void DecodeMapFile(string mapFile, string outputFile)
{
byte magicKey = 0;
byte[] buffer = new byte[2048];
int nread;
BinaryReader map;
BinaryWriter output;
try
{
map = new BinaryReader(new FileStream(mapFile, FileMode.Open));
}
catch(Exception e)
{
throw new Exception("Map file error", e);
}
try
{
output = new BinaryWriter(new FileStream(outputFile, FileMode.CreateNew));
}
catch(Exception e)
{
throw new Exception("Map file error", e);
}
while ((nread = map.Read(buffer, 0, 2048)) != 0)
{
for (int i = 0; i < nread; ++i)
{
buffer[i] ^= magicKey;
magicKey += 43;
}
output.Write(buffer, 0, nread);
}
map.Close();
output.Close();
}
/// <summary>
///
/// </summary>
/// <param name="mapFile"></param>
private void LoadMapFile(string mapFile)
{
FileStream map;
// Load the protocol map file
try
{
map = new FileStream(mapFile, FileMode.Open, FileAccess.Read);
}
catch(Exception e)
{
throw new Exception("Map file error", e);
}
try
{
StreamReader r = new StreamReader(map);
r.BaseStream.Seek(0, SeekOrigin.Begin);
string newline;
string trimmedline;
bool inPacket = false;
bool inBlock = false;
MapPacket currentPacket = null;
MapBlock currentBlock = null;
char[] trimArray = new char[] {' ', '\t'};
// While not at the end of the file
while (r.Peek() > -1)
{
#region ParseMap
newline = r.ReadLine();
trimmedline = System.Text.RegularExpressions.Regex.Replace(newline, @"\s+", " ");
trimmedline = trimmedline.Trim(trimArray);
if (!inPacket)
{
// Outside of all packet blocks
if (trimmedline == "{")
{
inPacket = true;
}
}
else
{
// Inside of a packet block
if (!inBlock)
{
// Inside a packet block, outside of the blocks
if (trimmedline == "{")
{
inBlock = true;
}
else if (trimmedline == "}")
{
// Reached the end of the packet
// currentPacket.Blocks.Sort();
inPacket = false;
}
else
{
// Skip comments
if (trimmedline.StartsWith("//")) continue;
// The packet header
#region ParsePacketHeader
// Splice the string in to tokens
string[] tokens = trimmedline.Split(new char[] {' ', '\t'});
if (tokens.Length > 3)
{
//Hash packet name to insure correct keyword ordering
KeywordPosition(tokens[0]);
uint packetID;
// Remove the leading "0x"
if (tokens[2].Length > 2 && tokens[2].Substring(0, 2) == "0x")
{
tokens[2] = tokens[2].Substring(2, tokens[2].Length - 2);
packetID = UInt32.Parse(tokens[2], System.Globalization.NumberStyles.HexNumber);
} else {
packetID = UInt32.Parse(tokens[2]);
}
if (tokens[1] == "Fixed")
{
// Truncate the id to a short
packetID &= 0xFFFF;
LowMaps[packetID] = new MapPacket();
LowMaps[packetID].ID = (ushort)packetID;
LowMaps[packetID].Frequency = PacketFrequency.Low;
LowMaps[packetID].Name = tokens[0];
LowMaps[packetID].Trusted = (tokens[3] == "Trusted");
LowMaps[packetID].Encoded = (tokens[4] == "Zerocoded");
LowMaps[packetID].Blocks = new List<MapBlock>();
currentPacket = LowMaps[packetID];
}
else if (tokens[1] == "Low")
{
LowMaps[packetID] = new MapPacket();
LowMaps[packetID].ID = (ushort)packetID;
LowMaps[packetID].Frequency = PacketFrequency.Low;
LowMaps[packetID].Name = tokens[0];
LowMaps[packetID].Trusted = (tokens[2] == "Trusted");
LowMaps[packetID].Encoded = (tokens[4] == "Zerocoded");
LowMaps[packetID].Blocks = new List<MapBlock>();
currentPacket = LowMaps[packetID];
}
else if (tokens[1] == "Medium")
{
MediumMaps[packetID] = new MapPacket();
MediumMaps[packetID].ID = (ushort)packetID;
MediumMaps[packetID].Frequency = PacketFrequency.Medium;
MediumMaps[packetID].Name = tokens[0];
MediumMaps[packetID].Trusted = (tokens[2] == "Trusted");
MediumMaps[packetID].Encoded = (tokens[4] == "Zerocoded");
MediumMaps[packetID].Blocks = new List<MapBlock>();
currentPacket = MediumMaps[packetID];
}
else if (tokens[1] == "High")
{
HighMaps[packetID] = new MapPacket();
HighMaps[packetID].ID = (ushort)packetID;
HighMaps[packetID].Frequency = PacketFrequency.High;
HighMaps[packetID].Name = tokens[0];
HighMaps[packetID].Trusted = (tokens[2] == "Trusted");
HighMaps[packetID].Encoded = (tokens[4] == "Zerocoded");
HighMaps[packetID].Blocks = new List<MapBlock>();
currentPacket = HighMaps[packetID];
}
else
{
//Client.Log("Unknown packet frequency", Helpers.LogLevel.Error);
throw new Exception("Unknown packet frequency");
}
}
#endregion
}
}
else
{
if (trimmedline.Length > 0 && trimmedline.Substring(0, 1) == "{")
{
// A field
#region ParseField
MapField field = new MapField();
// Splice the string in to tokens
string[] tokens = trimmedline.Split(new char[] {' ', '\t'});
field.Name = tokens[1];
field.KeywordPosition = KeywordPosition(field.Name);
field.Type = (FieldType)Enum.Parse(typeof(FieldType), tokens[2], true);
if (tokens[3] != "}")
{
field.Count = Int32.Parse(tokens[3]);
}
else
{
field.Count = 1;
}
// Save this field to the current block
currentBlock.Fields.Add(field);
#endregion
}
else if (trimmedline == "}")
{
// currentBlock.Fields.Sort();
inBlock = false;
}
else if (trimmedline.Length != 0 && trimmedline.Substring(0, 2) != "//")
{
// The block header
#region ParseBlockHeader
currentBlock = new MapBlock();
// Splice the string in to tokens
string[] tokens = trimmedline.Split(new char[] {' ', '\t'});
currentBlock.Name = tokens[0];
currentBlock.KeywordPosition = KeywordPosition(currentBlock.Name);
currentBlock.Fields = new List<MapField>();
currentPacket.Blocks.Add(currentBlock);
if (tokens[1] == "Single")
{
currentBlock.Count = 1;
}
else if (tokens[1] == "Multiple")
{
currentBlock.Count = Int32.Parse(tokens[2]);
}
else if (tokens[1] == "Variable")
{
currentBlock.Count = -1;
}
else
{
//Client.Log("Unknown block frequency", Helpers.LogLevel.Error);
throw new Exception("Unknown block frequency");
}
#endregion
}
}
}
#endregion
}
r.Close();
map.Close();
}
catch (Exception e)
{
throw e;
}
}
private int KeywordPosition(string keyword)
{
if (KeywordPositions.ContainsKey(keyword))
{
return KeywordPositions[keyword];
}
int hash = 0;
for (int i = 1; i < keyword.Length; i++)
{
hash = (hash + (int)(keyword[i])) * 2;
}
hash *= 2;
hash &= 0x1FFF;
int startHash = hash;
while (KeywordPositions.ContainsValue(hash))
{
hash++;
hash &= 0x1FFF;
if (hash == startHash)
{
//Give up looking, went through all values and they were all taken.
throw new Exception("All hash values are taken. Failed to add keyword: " + keyword);
}
}
KeywordPositions[keyword] = hash;
return hash;
}
}
}