CodeTempla
71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
#ifndef TELNET_HANDLER__H_
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#define TELNET_HANDLER__H_
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#ifdef _WIN32
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#pragma once
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#endif
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class HTelnetHandler : public HProtocolHandler
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{
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public:
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enum eCommand
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{
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SE = 240, // End of subnegotiation parameters.
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NOP = 241, // No operation Data mark. Indicates the position of a Synch event within the data stream.
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DM = 242, // This should always be accompanied by a TCP urgent notification.
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BRK = 243, // Break. Indicates that the "break" or "attention" key was hit.
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IP = 244, // Suspend, interrupt or abort the process to which the NVT is connected.
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AO = 245, // Abort output. Allows the current process to run to completion but donot send its output to the user.
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AYT = 246, // Are you there. Send back to the NVT some visible evidence that the AYT was received.
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EC = 247, // Erase character. The receiver should delete the last preceding undeleted character from the data stream.
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EL = 248, // Erase line. Delete characters from the data stream back to but not including the previous CRLF.
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GA = 249, // Go ahead. Used, under certain circumstances, to tell the other end that it can transmit.
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SB = 250, // Subnegotiation of the indicated option follows.
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WILL = 251, // Indicates the desire to begin performing, or confirmation that you are now performing, the indicated option.
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WONT = 252, // Indicates the refusal to perform, or continue performing, the indicated option.
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DO = 253, // Indicates the request that the other party perform, or confirmation that you are expecting the other party to perform, the indicated option.
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DONT = 254, // Indicates the demand that the other party stop performing, or confirmation that you are no longer expecting the other party to perform, the indicated option.
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IAC = 255 // Interpret as command.
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};
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enum EOption
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{
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ECHO = 1, // echo (RFC 857)
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SGAHEAD = 3, // suppress go ahead (RFC 858)
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STATUS = 5, // status (RFC 859)
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TMARK = 6, // timing mark (RFC 860)
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TTYPE = 24, // terminal type (RFC 1091)
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WSIZE = 31, // window size (RFC 1073)
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TSPEED = 32, // terminal speed (RFC 1079)
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RFCONTROL = 33, // remote flow control (RFC 1372)
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LMODE = 34, // linemode (RFC 1184)
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EVARIABLES = 36, // environment variables (RFC 1408)
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};
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enum
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{
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MAX_COMMAND_BUFFER_SIZE = 4096
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};
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HTelnetHandler();
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~HTelnetHandler();
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protected:
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void OnReceivedStatusFromTransport(int nStatus);
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int OnReceivedFromTransport(const char * pData, int nSize);
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virtual void OnEstablished() {}
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virtual bool OnInitialReceive(const char * pData, unsigned nSize) { return true; }
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virtual int OnReceivedCommand(const char * pszCommand) = 0;
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protected:
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char m_pCommandBuffer[MAX_COMMAND_BUFFER_SIZE + 1];
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unsigned int m_nCommandBufferedLength;
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int m_bInitialStep;
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};
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#endif // PROTOCOL_HANDLER__H_
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