2  * fsm.c - {Link, IP} Control Protocol Finite State Machine.
76  * Initialize fsm state.
80     f->state = PPP_FSM_INITIAL;  in fsm_init()
92     switch( f->state ){  in fsm_lowerup()
94 	f->state = PPP_FSM_CLOSED;  in fsm_lowerup()
99 	    f->state = PPP_FSM_STOPPED;  in fsm_lowerup()
103 	    f->state = PPP_FSM_REQSENT;  in fsm_lowerup()
108 	FSMDEBUG(("%s: Up event in state %d!", PROTO_NAME(f), f->state));  in fsm_lowerup()
120     switch( f->state ){  in fsm_lowerdown()
122 	f->state = PPP_FSM_INITIAL;  in fsm_lowerdown()
126 	f->state = PPP_FSM_STARTING;  in fsm_lowerdown()
132 	f->state = PPP_FSM_INITIAL;  in fsm_lowerdown()
140 	f->state = PPP_FSM_STARTING;  in fsm_lowerdown()
147 	f->state = PPP_FSM_STARTING;  in fsm_lowerdown()
151 	FSMDEBUG(("%s: Down event in state %d!", PROTO_NAME(f), f->state));  in fsm_lowerdown()
161     switch( f->state ){  in fsm_open()
163 	f->state = PPP_FSM_STARTING;  in fsm_open()
170 	    f->state = PPP_FSM_STOPPED;  in fsm_open()
174 	    f->state = PPP_FSM_REQSENT;  in fsm_open()
179 	f->state = PPP_FSM_STOPPING;  in fsm_open()
203     if( f->state != PPP_FSM_OPENED )  in terminate_layer()
219 	f->state = nextstate == PPP_FSM_CLOSING ? PPP_FSM_CLOSED : PPP_FSM_STOPPED;  in terminate_layer()
228     f->state = nextstate;  in terminate_layer()
235  * the PPP_FSM_CLOSED state.
240     switch( f->state ){  in fsm_close()
242 	f->state = PPP_FSM_INITIAL;  in fsm_close()
245 	f->state = PPP_FSM_CLOSED;  in fsm_close()
248 	f->state = PPP_FSM_CLOSING;  in fsm_close()
270     switch (f->state) {  in fsm_timeout()
277 	    f->state = (f->state == PPP_FSM_CLOSING)? PPP_FSM_CLOSED: PPP_FSM_STOPPED;  in fsm_timeout()
294 	    f->state = PPP_FSM_STOPPED;  in fsm_timeout()
303 	    if( f->state == PPP_FSM_ACKRCVD )  in fsm_timeout()
304 		f->state = PPP_FSM_REQSENT;  in fsm_timeout()
309 	FSMDEBUG(("%s: Timeout event in state %d!", PROTO_NAME(f), f->state));  in fsm_timeout()
345     if( f->state == PPP_FSM_INITIAL || f->state == PPP_FSM_STARTING ){  in fsm_input()
346 	FSMDEBUG(("fsm_input(%x): Rcvd packet in state %d.",  in fsm_input()
347 		  f->protocol, f->state));  in fsm_input()
395     switch( f->state ){  in fsm_rconfreq()
409 	f->state = PPP_FSM_REQSENT;  in fsm_rconfreq()
415 	f->state = PPP_FSM_REQSENT;  in fsm_rconfreq()
437 	if (f->state == PPP_FSM_ACKRCVD) {  in fsm_rconfreq()
439 	    f->state = PPP_FSM_OPENED;  in fsm_rconfreq()
443 	    f->state = PPP_FSM_ACKSENT;  in fsm_rconfreq()
448 	if (f->state != PPP_FSM_ACKRCVD)  in fsm_rconfreq()
449 	    f->state = PPP_FSM_REQSENT;  in fsm_rconfreq()
473     switch (f->state) {  in fsm_rconfack()
480 	f->state = PPP_FSM_ACKRCVD;  in fsm_rconfack()
488 	f->state = PPP_FSM_REQSENT;  in fsm_rconfack()
493 	f->state = PPP_FSM_OPENED;  in fsm_rconfack()
504 	f->state = PPP_FSM_REQSENT;  in fsm_rconfack()
541     switch (f->state) {  in fsm_rconfnakrej()
552 	    f->state = PPP_FSM_STOPPED;		/* kludge for stopping CCP */  in fsm_rconfnakrej()
561 	f->state = PPP_FSM_REQSENT;  in fsm_rconfnakrej()
569 	f->state = PPP_FSM_REQSENT;  in fsm_rconfnakrej()
583     switch (f->state) {  in fsm_rtermreq()
586 	f->state = PPP_FSM_REQSENT;		/* Start over but keep trying */  in fsm_rtermreq()
595 	f->state = PPP_FSM_STOPPING;  in fsm_rtermreq()
612     switch (f->state) {  in fsm_rtermack()
615 	f->state = PPP_FSM_CLOSED;  in fsm_rtermack()
621 	f->state = PPP_FSM_STOPPED;  in fsm_rtermack()
627 	f->state = PPP_FSM_REQSENT;  in fsm_rtermack()
634 	f->state = PPP_FSM_REQSENT;  in fsm_rtermack()
656     if( f->state == PPP_FSM_ACKRCVD )  in fsm_rcoderej()
657 	f->state = PPP_FSM_REQSENT;  in fsm_rcoderej()
667     switch( f->state ){  in fsm_protreject()
673 	f->state = PPP_FSM_CLOSED;  in fsm_protreject()
686 	f->state = PPP_FSM_STOPPED;  in fsm_protreject()
696 	FSMDEBUG(("%s: Protocol-reject event in state %d!",  in fsm_protreject()
697 		  PROTO_NAME(f), f->state));  in fsm_protreject()
712     if( f->state != PPP_FSM_REQSENT && f->state != PPP_FSM_ACKRCVD && f->state != PPP_FSM_ACKSENT ){  in fsm_sconfreq()