Esempio n. 1
0
/*
 * Generate side effects of enabling or disabling an option.
 */
static void option_side_effects(Telnet telnet, const struct Opt *o, int enabled)
{
    if (o->option == TELOPT_ECHO && o->send == DO)
	telnet->echoing = !enabled;
    else if (o->option == TELOPT_SGA && o->send == DO)
	telnet->editing = !enabled;
    if (telnet->ldisc)		       /* cause ldisc to notice the change */
	ldisc_send(telnet->ldisc, NULL, 0, 0);

    /* Ensure we get the minimum options */
    if (!telnet->activated) {
	if (telnet->opt_states[o_echo.index] == INACTIVE) {
	    telnet->opt_states[o_echo.index] = REQUESTED;
	    send_opt(telnet, o_echo.send, o_echo.option);
	}
	if (telnet->opt_states[o_we_sga.index] == INACTIVE) {
	    telnet->opt_states[o_we_sga.index] = REQUESTED;
	    send_opt(telnet, o_we_sga.send, o_we_sga.option);
	}
	if (telnet->opt_states[o_they_sga.index] == INACTIVE) {
	    telnet->opt_states[o_they_sga.index] = REQUESTED;
	    send_opt(telnet, o_they_sga.send, o_they_sga.option);
	}
	telnet->activated = TRUE;
    }
}
Esempio n. 2
0
static void proc_rec_opt(Telnet telnet, int cmd, int option)
{
    const struct Opt *const *o;

    log_option(telnet, "server", cmd, option);
    for (o = opts; *o; o++) {
	if ((*o)->option == option && (*o)->ack == cmd) {
	    switch (telnet->opt_states[(*o)->index]) {
	      case REQUESTED:
		telnet->opt_states[(*o)->index] = ACTIVE;
		activate_option(telnet, *o);
		break;
	      case ACTIVE:
		break;
	      case INACTIVE:
		telnet->opt_states[(*o)->index] = ACTIVE;
		send_opt(telnet, (*o)->send, option);
		activate_option(telnet, *o);
		break;
	      case REALLY_INACTIVE:
		send_opt(telnet, (*o)->nsend, option);
		break;
	    }
	    return;
	} else if ((*o)->option == option && (*o)->nak == cmd) {
	    switch (telnet->opt_states[(*o)->index]) {
	      case REQUESTED:
		telnet->opt_states[(*o)->index] = INACTIVE;
		refused_option(telnet, *o);
		break;
	      case ACTIVE:
		telnet->opt_states[(*o)->index] = INACTIVE;
		send_opt(telnet, (*o)->nsend, option);
		option_side_effects(telnet, *o, 0);
		break;
	      case INACTIVE:
	      case REALLY_INACTIVE:
		break;
	    }
	    return;
	}
    }
    /*
     * If we reach here, the option was one we weren't prepared to
     * cope with. If the request was positive (WILL or DO), we send
     * a negative ack to indicate refusal. If the request was
     * negative (WONT / DONT), we must do nothing.
     */
    if (cmd == WILL || cmd == DO)
        send_opt(telnet, (cmd == WILL ? DONT : WONT), option);
}
Esempio n. 3
0
static void deactivate_option(Telnet telnet, const struct Opt *o)
{
    if (telnet->opt_states[o->index] == REQUESTED ||
	telnet->opt_states[o->index] == ACTIVE)
	send_opt(telnet, o->nsend, o->option);
    telnet->opt_states[o->index] = REALLY_INACTIVE;
}
Esempio n. 4
0
static void refused_option(Telnet telnet, const struct Opt *o)
{
    if (o->send == WILL && o->option == TELOPT_NEW_ENVIRON &&
	telnet->opt_states[o_oenv.index] == INACTIVE) {
	send_opt(telnet, WILL, TELOPT_OLD_ENVIRON);
	telnet->opt_states[o_oenv.index] = REQUESTED;
    }
    option_side_effects(telnet, o, 0);
}
Esempio n. 5
0
static void proc_rec_opt (int cmd, int option) {
    struct Opt **o;

    for (o = opts; *o; o++) {
	if ((*o)->option == option && (*o)->ack == cmd) {
	    switch ((*o)->state) {
	      case REQUESTED:
		(*o)->state = ACTIVE;
		break;
	      case ACTIVE:
		break;
	      case INACTIVE:
		(*o)->state = ACTIVE;
		send_opt ((*o)->send, option);
		break;
	    }
	    return;
	} else if ((*o)->option == option && (*o)->nak == cmd) {
	    switch ((*o)->state) {
	      case REQUESTED:
		(*o)->state = INACTIVE;
		break;
	      case ACTIVE:
		(*o)->state = INACTIVE;
		send_opt ((*o)->nsend, option);
		break;
	      case INACTIVE:
		break;
	    }
	    return;
	}
    }
    /*
     * If we reach here, the option was one we weren't prepared to
     * cope with. So send a negative ack.
     */
    send_opt ((cmd == WILL ? DONT : WONT), option);
}
Esempio n. 6
0
static void do_telnet_init (void) {
    struct Opt **o;

    /*
     * Initialise option states.
     */
    for (o = opts; *o; o++)
	if ((*o)->state == REQUESTED)
	    send_opt ((*o)->send, (*o)->option);

    /*
     * Set up SYNCH state.
     */
    in_synch = FALSE;
}