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0001 /*************************************************************************** 0002 cmccp.h - MCCP support 0003 ------------------- 0004 begin : Pi feb 14 2003 0005 copyright : (C) 2003 by Tomas Mecir 0006 email : kmuddy@kmuddy.com 0007 ***************************************************************************/ 0008 0009 /*************************************************************************** 0010 * * 0011 * This program is free software; you can redistribute it and/or modify * 0012 * it under the terms of the GNU General Public License as published by * 0013 * the Free Software Foundation; either version 2 of the License, or * 0014 * (at your option) any later version. * 0015 * * 0016 ***************************************************************************/ 0017 0018 #ifndef CMCCP_H 0019 #define CMCCP_H 0020 0021 #include <zlib.h> 0022 0023 class cTelnet; 0024 0025 /** 0026 MCCP v1/v2 parser and decompressor. 0027 *@author Tomas Mecir 0028 */ 0029 0030 class cMCCP { 0031 public: 0032 cMCCP (cTelnet *_telnet); 0033 ~cMCCP (); 0034 /** Prepare decompression, params are input/output buffers and size of 0035 output buffer. */ 0036 void prepareDecompression (char *_inBuf, char *_outBuf, int inSize, int buflen); 0037 /** Uncompress as much as fits in the output buffer. Uncompressed 0038 portions are placed there as well. */ 0039 int uncompressNext (); 0040 /** MCCP v1 changes state */ 0041 void setMCCP1 (bool val); 0042 /** MCCP v2 changes state */ 0043 void setMCCP2 (bool val); 0044 /** returns amount of compressed bytes received so far */ 0045 int compressedBytes () { return compressed; }; 0046 /** returns size of all received data after decompression */ 0047 int uncompressedBytes () { return decompressed; }; 0048 /** reset the object */ 0049 void reset (); 0050 bool usingMCCP () { return usemccp; }; 0051 int MCCPVer () { return usemccp ? (mccp2 ? 2 : 1) : 0; }; 0052 private: 0053 /** this function does the actual decompression */ 0054 int doUncompressNext (); 0055 0056 char *inBuf; 0057 char *outBuf; 0058 int len; 0059 z_stream stream; 0060 0061 cTelnet *telnet; 0062 bool usemccp; 0063 bool mccp1, mccp2; 0064 bool instream; 0065 char seqData[8]; 0066 int state; 0067 0068 int compressed, decompressed; 0069 }; 0070 0071 #endif