74 #define	TS_WILL		5	/* will option negotiation */
223 	     * Begin option subnegotiation...  in telrcv()
251 	     * Handle RFC 10xx Telnet linemode option additions  in telrcv()
312 		suboption();	/* handle sub-option */  in telrcv()
349  * Telnet option processing state machine.
399  * peer probably should be buffering until this option state negotiation
404 send_do(int option, int init)  in send_do()  argument
407 	if ((do_dont_resp[option] == 0 && his_state_is_will(option)) ||  in send_do()
408 	    his_want_state_is_will(option))  in send_do()
415 	if (option == TELOPT_TM)  in send_do()
416 	    set_his_want_state_wont(option);  in send_do()
418 	    set_his_want_state_will(option);  in send_do()
419 	do_dont_resp[option]++;  in send_do()
421     output_data((const char *)doopt, option);  in send_do()
423     DIAG(TD_OPTIONS, printoption("td: send do", option));  in send_do()
434 willoption(int option)  in willoption()  argument
443     DIAG(TD_OPTIONS, printoption("td: recv will", option));  in willoption()
445     if (do_dont_resp[option]) {  in willoption()
446 	do_dont_resp[option]--;  in willoption()
447 	if (do_dont_resp[option] && his_state_is_will(option))  in willoption()
448 	    do_dont_resp[option]--;  in willoption()
450     if (do_dont_resp[option] == 0) {  in willoption()
451 	if (his_want_state_is_wont(option)) {  in willoption()
452 	    switch (option) {  in willoption()
478 		 * option, then don't worry peer that we can't  in willoption()
514 		set_his_want_state_will(option);  in willoption()
515 		send_do(option, 0);  in willoption()
517 		do_dont_resp[option]++;  in willoption()
518 		send_dont(option, 0);  in willoption()
522 	     * Option processing that should happen when  in willoption()
526 	    switch (option) {  in willoption()
533 		send_dont(option, 1);  in willoption()
569     set_his_state_will(option);  in willoption()
575 send_dont(int option, int init)  in send_dont()  argument
578 	if ((do_dont_resp[option] == 0 && his_state_is_wont(option)) ||  in send_dont()
579 	    his_want_state_is_wont(option))  in send_dont()
581 	set_his_want_state_wont(option);  in send_dont()
582 	do_dont_resp[option]++;  in send_dont()
584     output_data((const char *)dont, option);  in send_dont()
586     DIAG(TD_OPTIONS, printoption("td: send dont", option));  in send_dont()
590 wontoption(int option)  in wontoption()  argument
596     DIAG(TD_OPTIONS, printoption("td: recv wont", option));  in wontoption()
598     if (do_dont_resp[option]) {  in wontoption()
599 	do_dont_resp[option]--;  in wontoption()
600 	if (do_dont_resp[option] && his_state_is_wont(option))  in wontoption()
601 	    do_dont_resp[option]--;  in wontoption()
603     if (do_dont_resp[option] == 0) {  in wontoption()
604 	if (his_want_state_is_will(option)) {  in wontoption()
606 	    switch (option) {  in wontoption()
630 		 * option, then let peer know that we can't  in wontoption()
648 		 * option rather than responding to the request,  in wontoption()
676 	    set_his_want_state_wont(option);  in wontoption()
677 	    if (his_state_is_will(option))  in wontoption()
678 		send_dont(option, 0);  in wontoption()
680 	    switch (option) {  in wontoption()
694     set_his_state_wont(option);  in wontoption()
699 send_will(int option, int init)  in send_will()  argument
702 	if ((will_wont_resp[option] == 0 && my_state_is_will(option))||  in send_will()
703 	    my_want_state_is_will(option))  in send_will()
705 	set_my_want_state_will(option);  in send_will()
706 	will_wont_resp[option]++;  in send_will()
708     output_data ((const char *)will, option);  in send_will()
710     DIAG(TD_OPTIONS, printoption("td: send will", option));  in send_will()
723 dooption(int option)  in dooption()  argument
731     DIAG(TD_OPTIONS, printoption("td: recv do", option));  in dooption()
733     if (will_wont_resp[option]) {  in dooption()
734 	will_wont_resp[option]--;  in dooption()
735 	if (will_wont_resp[option] && my_state_is_will(option))  in dooption()
736 	    will_wont_resp[option]--;  in dooption()
738     if ((will_wont_resp[option] == 0) && (my_want_state_is_wont(option))) {  in dooption()
739 	switch (option) {  in dooption()
770 	    send_will(option, 0);  in dooption()
771 	    set_my_want_state_wont(option);  in dooption()
772 	    set_my_state_wont(option);  in dooption()
777 	     * When we get a LOGOUT option, respond  in dooption()
809 	    set_my_want_state_will(option);  in dooption()
810 	    send_will(option, 0);  in dooption()
812 	    will_wont_resp[option]++;  in dooption()
813 	    send_wont(option, 0);  in dooption()
816     set_my_state_will(option);  in dooption()
821 send_wont(int option, int init)  in send_wont()  argument
824 	if ((will_wont_resp[option] == 0 && my_state_is_wont(option)) ||  in send_wont()
825 	    my_want_state_is_wont(option))  in send_wont()
827 	set_my_want_state_wont(option);  in send_wont()
828 	will_wont_resp[option]++;  in send_wont()
830     output_data ((const char *)wont, option);  in send_wont()
832     DIAG(TD_OPTIONS, printoption("td: send wont", option));  in send_wont()
836 dontoption(int option)  in dontoption()  argument
843     DIAG(TD_OPTIONS, printoption("td: recv dont", option));  in dontoption()
845     if (will_wont_resp[option]) {  in dontoption()
846 	will_wont_resp[option]--;  in dontoption()
847 	if (will_wont_resp[option] && my_state_is_wont(option))  in dontoption()
848 	    will_wont_resp[option]--;  in dontoption()
850     if ((will_wont_resp[option] == 0) && (my_want_state_is_will(option))) {  in dontoption()
851 	switch (option) {  in dontoption()
867 	    set_my_want_state_wont(option);  in dontoption()
868 	    if (my_state_is_will(option))  in dontoption()
869 		send_wont(option, 0);  in dontoption()
870 	    set_my_state_wont(option);  in dontoption()
872 		send_will(option, 1);  in dontoption()
879 	set_my_want_state_wont(option);  in dontoption()
880 	if (my_state_is_will(option))  in dontoption()
881 	    send_wont(option, 0);  in dontoption()
883     set_my_state_wont(option);  in dontoption()
898  *	Look at the sub-option buffer, and try to be helpful to the other
920 	if (his_state_is_wont(TELOPT_TSPEED))	/* Ignore if option disabled */  in suboption()
944 	if (his_state_is_wont(TELOPT_TTYPE))	/* Ignore if option disabled */  in suboption()
971 	if (his_state_is_wont(TELOPT_NAWS))	/* Ignore if option disabled */  in suboption()
1125 		     * If the client has sent us a well-formed option,  in suboption()
1312      * because if we received a DO/WILL for an option that we  in send_status()