NetServerTelnet.hpp

//------------------------------------------------------------------------------
//This file is part of embKernel. 
//See license.txt for the full license governing this code.
//------------------------------------------------------------------------------

#ifndef NET_SERVER_TELNET_HPP_
#define NET_SERVER_TELNET_HPP_

#include "RtosInclude.hpp"
#include "NetInclude.hpp"

class NetServerTelnet: public RtosRunnable {
protected:
    typedef void (NetServerTelnet::*CMD_HANDLER)(int argc, char *argv[]);

    typedef struct {
        const char* name;
        CMD_HANDLER handler;
        const char* descritpion;
    } ENTRY;

    const ENTRY* mEntries;

public:
    NetServerTelnet(int priority, size_t stackSize);
    ~NetServerTelnet();

private:
    const static int MAX_LINE_LEN = 256;
    bool mIsLineFeedSeq;

    void iacNegotiate();

protected:
    RtosTask mTask;
    NetTcpSocket mSocket;

    int getLine(char** line);
    void freeLine(char* line);

    int getArgc(char* line);
    void getArgV(char* line, char* argv[]);

    virtual void onConnection();
    virtual void onDisconnection();
    virtual void run();

    void ansiCursorUp(int value);
    void ansiCursorDown(int value);
    void ansiCursorForward(int value);
    void ansiCursorBack(int value);
    void ansiCursorPosition(int x, int y);
    void ansiEraseData(int value);
    void ansiEraseInLine(int value);
    void ansiSaveCursorPosition();
    void ansiRestoreCursorPosition();
    void ansiHideCursor();
    void ansiShowCursor();

    const static int RESULT_ERR_LINE_TOO_LONG = -1;
    const static int RESULT_ERR_MEMORY = -2;
    const static int RESULT_ERR_IO = -3;
    const static int RESULT_EMPTY_LINE = -4;

private:
    typedef enum
        :uint8_t {
            SE = 240, //End of subnegotiation parameters
        NOP = 241, //No operation
        DM = 242, //Data mark   Indicates the position of a Synch event within the data stream. This should always be accompanied by a TCP urgent notification.
        BRK = 243, //Break   Indicates that the "break" or "attention" key was hi.
        IP = 244, //Suspend Interrupt or abort the process to which the NVT is connected.
        AO = 245, //Abort output    Allows the current process to run to completion but does not send its output to the user.
        AYT = 246, //Are you there   Send back to the NVT some visible evidence that the AYT was received.
        EC = 247, //Erase character The receiver should delete the last preceding undeleted character from the data stream.
        EL = 248, //Erase line  Delete characters from the data stream back to but not including the previous CRLF.
        GA = 249, //Go ahead     Under certain circumstances used to tell the other end that it can transmit.
        SB = 250, //Subnegotiation  Subnegotiation of the indicated option follows.
        WILL = 251, //will    Indicates the desire to begin performing, or confirmation that you are now performing, the indicated option.
        WONT = 252, //wont    Indicates the refusal to perform, or continue performing, the indicated option.
        DO = 253, //do  Indicates the request that the other party perform, or confirmation that you are expecting the other party to perform, the indicated option.
        DONT = 254, //dont    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.
        IAC = 255 //Interpret as
    } COMMANDS;

    typedef enum
        :uint8_t {
            SUPPRESS_GO_AHEAD = 3, //suppress go ahead (RFC858)
        STATUS = 5, //status (RFC859)
        ECHO = 1, //echo (RFC857)
        TIMING_MARK = 6, //timing mark (RFC860)
        TERMINAL_TYPE = 24, //terminal type (RFC1091)
        WINDOW_SIZE = 31, //window size (RFC1073)
        TERMINAL_SPEED = 32, //terminal speed (RFC1079)
        REMOTE_FLOW_CONTROL = 33, //remote flow control(RFC1372)
        LINEMODE = 34, //linemode (RFC1184)
        ENVIRONMENT_VARIABLES = 36 //environment variables (RFC1408)
    } OPTION;

};

#endif /* NET_SERVER_TELNET_HPP_ */