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TCP/IP program to handle telnet "do/don't" TERMINAL-TYPE option

Posted By: Milind Mishra     Category: Networking     Views: 3438

TCP/IP program to handle telnet "do/don't" TERMINAL-TYPE option.

Code for TCP/IP program to handle telnet "do/don't" TERMINAL-TYPE option in Networking

#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>

#include "telnet.h"char        termtype;    /* non-zero if received "DO TERMTYPE"    */char        *term;        /* terminal name            */extern u_char    option_cmd;

int    do_txbinary(FILE *,FILE *,int), will_txbinary(FILE *,FILE *,int);

/*------------------------------------------------------------------------ * will_termtype - handle telnet "do/don't" TERMINAL-TYPE option *------------------------------------------------------------------------ */int
will_termtype(FILE *sfp, FILE *tfp, int c)
{
    if (termtype) {
        if (option_cmd == TCDO)
            return 0;
    } elseif (option_cmd == TCDONT)
        return 0;
    termtype = !termtype;
    if (termtype)
        if (!term && !(term = getenv("TERM")))
            termtype = !termtype;    /* can't do it... */
    (void) putc(TCIAC, sfp);
    if (termtype)
        (void) putc(TCWILL, sfp);
    else
        (void) putc(TCWONT, sfp);
    (void) putc((char)c, sfp);
    if (termtype) {    /* set up binary data path; send WILL, DO */
        option_cmd = TCWILL;
        (void) do_txbinary(sfp, tfp, TOTXBINARY);
        option_cmd = TCDO;
        (void) will_txbinary(sfp, tfp, TOTXBINARY);
    }
    return 0;
}
  
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Milind Mishra
Milind Mishra author of TCP/IP program to handle telnet "do/don't" TERMINAL-TYPE option is from India.
 
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