#W# Initial Commit: Avatars Conquest
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8eae46895e
7512 changed files with 416187 additions and 0 deletions
457
Source/Network/PacketReader.cs
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457
Source/Network/PacketReader.cs
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/***************************************************************************
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* PacketReader.cs
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* -------------------
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* begin : May 1, 2002
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* copyright : (C) The RunUO Software Team
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* email : info@runuo.com
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*
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* $Id$
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*
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***************************************************************************/
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/***************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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***************************************************************************/
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using System;
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using System.Text;
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using System.IO;
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namespace Server.Network
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{
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public class PacketReader
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{
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private byte[] m_Data;
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private int m_Size;
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private int m_Index;
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public PacketReader( byte[] data, int size, bool fixedSize )
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{
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m_Data = data;
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m_Size = size;
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m_Index = fixedSize ? 1 : 3;
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}
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public byte[] Buffer
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{
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get
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{
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return m_Data;
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}
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}
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public int Size
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{
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get
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{
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return m_Size;
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}
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}
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public void Trace( NetState state )
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{
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try
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{
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using ( StreamWriter sw = new StreamWriter( "Packets.log", true ) )
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{
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byte[] buffer = m_Data;
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if ( buffer.Length > 0 )
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sw.WriteLine( "Client: {0}: Unhandled packet 0x{1:X2}", state, buffer[0] );
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using ( MemoryStream ms = new MemoryStream( buffer ) )
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Utility.FormatBuffer( sw, ms, buffer.Length );
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sw.WriteLine();
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sw.WriteLine();
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}
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}
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catch
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{
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}
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}
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public int Seek( int offset, SeekOrigin origin )
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{
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switch ( origin )
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{
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case SeekOrigin.Begin: m_Index = offset; break;
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case SeekOrigin.Current: m_Index += offset; break;
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case SeekOrigin.End: m_Index = m_Size - offset; break;
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}
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return m_Index;
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}
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public int ReadInt32()
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{
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if ( (m_Index + 4) > m_Size )
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return 0;
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return (m_Data[m_Index++] << 24)
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| (m_Data[m_Index++] << 16)
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| (m_Data[m_Index++] << 8)
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| m_Data[m_Index++];
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}
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public short ReadInt16()
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{
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if ( (m_Index + 2) > m_Size )
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return 0;
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return (short)((m_Data[m_Index++] << 8) | m_Data[m_Index++]);
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}
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public byte ReadByte()
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{
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if ( (m_Index + 1) > m_Size )
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return 0;
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return m_Data[m_Index++];
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}
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public uint ReadUInt32()
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{
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if ( (m_Index + 4) > m_Size )
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return 0;
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return (uint)((m_Data[m_Index++] << 24) | (m_Data[m_Index++] << 16) | (m_Data[m_Index++] << 8) | m_Data[m_Index++]);
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}
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public ushort ReadUInt16()
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{
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if ( (m_Index + 2) > m_Size )
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return 0;
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return (ushort)((m_Data[m_Index++] << 8) | m_Data[m_Index++]);
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}
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public sbyte ReadSByte()
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{
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if ( (m_Index + 1) > m_Size )
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return 0;
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return (sbyte)m_Data[m_Index++];
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}
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public bool ReadBoolean()
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{
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if ( (m_Index + 1) > m_Size )
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return false;
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return ( m_Data[m_Index++] != 0 );
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}
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public string ReadUnicodeStringLE()
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{
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StringBuilder sb = new StringBuilder();
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int c;
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while ( (m_Index + 1) < m_Size && (c = (m_Data[m_Index++] | (m_Data[m_Index++] << 8))) != 0 )
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sb.Append( (char)c );
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return sb.ToString();
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}
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public string ReadUnicodeStringLESafe( int fixedLength )
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{
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int bound = m_Index + (fixedLength << 1);
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int end = bound;
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if ( bound > m_Size )
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bound = m_Size;
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StringBuilder sb = new StringBuilder();
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int c;
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while ( (m_Index + 1) < bound && (c = (m_Data[m_Index++] | (m_Data[m_Index++] << 8))) != 0 )
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{
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if ( IsSafeChar( c ) )
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sb.Append( (char)c );
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}
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m_Index = end;
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return sb.ToString();
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}
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public string ReadUnicodeStringLESafe()
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{
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StringBuilder sb = new StringBuilder();
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int c;
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while ( (m_Index + 1) < m_Size && (c = (m_Data[m_Index++] | (m_Data[m_Index++] << 8))) != 0 )
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{
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if ( IsSafeChar( c ) )
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sb.Append( (char)c );
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}
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return sb.ToString();
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}
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public string ReadUnicodeStringSafe()
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{
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StringBuilder sb = new StringBuilder();
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int c;
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while ( (m_Index + 1) < m_Size && (c = ((m_Data[m_Index++] << 8) | m_Data[m_Index++])) != 0 )
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{
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if ( IsSafeChar( c ) )
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sb.Append( (char)c );
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}
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return sb.ToString();
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}
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public string ReadUnicodeString()
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{
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StringBuilder sb = new StringBuilder();
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int c;
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while ( (m_Index + 1) < m_Size && (c = ((m_Data[m_Index++] << 8) | m_Data[m_Index++])) != 0 )
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sb.Append( (char)c );
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return sb.ToString();
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}
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public bool IsSafeChar( int c )
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{
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return ( c >= 0x20 && c < 0xFFFE );
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}
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public string ReadUTF8StringSafe( int fixedLength )
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{
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if ( m_Index >= m_Size )
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{
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m_Index += fixedLength;
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return String.Empty;
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}
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int bound = m_Index + fixedLength;
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//int end = bound;
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if ( bound > m_Size )
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bound = m_Size;
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int count = 0;
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int index = m_Index;
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int start = m_Index;
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while ( index < bound && m_Data[index++] != 0 )
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++count;
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index = 0;
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byte[] buffer = new byte[count];
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int value = 0;
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while ( m_Index < bound && (value = m_Data[m_Index++]) != 0 )
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buffer[index++] = (byte)value;
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string s = Utility.UTF8.GetString( buffer );
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bool isSafe = true;
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for ( int i = 0; isSafe && i < s.Length; ++i )
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isSafe = IsSafeChar( (int) s[i] );
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m_Index = start + fixedLength;
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if ( isSafe )
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return s;
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StringBuilder sb = new StringBuilder( s.Length );
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for ( int i = 0; i < s.Length; ++i )
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if ( IsSafeChar( (int) s[i] ) )
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sb.Append( s[i] );
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return sb.ToString();
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}
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public string ReadUTF8StringSafe()
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{
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if ( m_Index >= m_Size )
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return String.Empty;
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int count = 0;
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int index = m_Index;
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while ( index < m_Size && m_Data[index++] != 0 )
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++count;
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index = 0;
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byte[] buffer = new byte[count];
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int value = 0;
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while ( m_Index < m_Size && (value = m_Data[m_Index++]) != 0 )
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buffer[index++] = (byte)value;
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string s = Utility.UTF8.GetString( buffer );
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bool isSafe = true;
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for ( int i = 0; isSafe && i < s.Length; ++i )
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isSafe = IsSafeChar( (int) s[i] );
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if ( isSafe )
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return s;
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StringBuilder sb = new StringBuilder( s.Length );
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for ( int i = 0; i < s.Length; ++i )
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{
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if ( IsSafeChar( (int) s[i] ) )
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sb.Append( s[i] );
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}
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return sb.ToString();
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}
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public string ReadUTF8String()
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{
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if ( m_Index >= m_Size )
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return String.Empty;
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int count = 0;
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int index = m_Index;
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while ( index < m_Size && m_Data[index++] != 0 )
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++count;
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index = 0;
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byte[] buffer = new byte[count];
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int value = 0;
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while ( m_Index < m_Size && (value = m_Data[m_Index++]) != 0 )
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buffer[index++] = (byte)value;
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return Utility.UTF8.GetString( buffer );
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}
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public string ReadString()
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{
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StringBuilder sb = new StringBuilder();
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int c;
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while ( m_Index < m_Size && (c = m_Data[m_Index++]) != 0 )
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sb.Append( (char)c );
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return sb.ToString();
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}
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public string ReadStringSafe()
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{
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StringBuilder sb = new StringBuilder();
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int c;
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while ( m_Index < m_Size && (c = m_Data[m_Index++]) != 0 )
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{
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if ( IsSafeChar( c ) )
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sb.Append( (char)c );
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}
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return sb.ToString();
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}
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public string ReadUnicodeStringSafe( int fixedLength )
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{
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int bound = m_Index + (fixedLength << 1);
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int end = bound;
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if ( bound > m_Size )
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bound = m_Size;
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StringBuilder sb = new StringBuilder();
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int c;
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while ( (m_Index + 1) < bound && (c = ((m_Data[m_Index++] << 8) | m_Data[m_Index++])) != 0 )
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{
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if ( IsSafeChar( c ) )
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sb.Append( (char)c );
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}
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m_Index = end;
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return sb.ToString();
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}
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public string ReadUnicodeString( int fixedLength )
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{
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int bound = m_Index + (fixedLength << 1);
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int end = bound;
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if ( bound > m_Size )
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bound = m_Size;
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StringBuilder sb = new StringBuilder();
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int c;
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while ( (m_Index + 1) < bound && (c = ((m_Data[m_Index++] << 8) | m_Data[m_Index++])) != 0 )
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sb.Append( (char)c );
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m_Index = end;
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return sb.ToString();
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}
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public string ReadStringSafe( int fixedLength )
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{
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int bound = m_Index + fixedLength;
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int end = bound;
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if ( bound > m_Size )
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bound = m_Size;
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StringBuilder sb = new StringBuilder();
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int c;
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while ( m_Index < bound && (c = m_Data[m_Index++]) != 0 )
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{
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if ( IsSafeChar( c ) )
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sb.Append( (char)c );
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}
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m_Index = end;
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return sb.ToString();
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}
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public string ReadString( int fixedLength )
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{
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int bound = m_Index + fixedLength;
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int end = bound;
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if ( bound > m_Size )
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bound = m_Size;
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StringBuilder sb = new StringBuilder();
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int c;
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while ( m_Index < bound && (c = m_Data[m_Index++]) != 0 )
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sb.Append( (char)c );
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m_Index = end;
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return sb.ToString();
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}
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}
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}
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