net/wan/hdlc_fr.c

35 #include <linux/hdlc.h>
162 static inline struct frad_state *state(hdlc_device *hdlc)
164 	return (struct frad_state *)(hdlc->state);
167 static inline struct pvc_device *find_pvc(hdlc_device *hdlc, u16 dlci)
169 	struct pvc_device *pvc = state(hdlc)->first_pvc;
184 	hdlc_device *hdlc = dev_to_hdlc(dev);
185 	struct pvc_device *pvc, **pvc_p = &state(hdlc)->first_pvc;
233 static inline void delete_unused_pvcs(hdlc_device *hdlc)
235 	struct pvc_device **pvc_p = &state(hdlc)->first_pvc;
331 		hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
333 		if (state(hdlc)->settings.lmi == LMI_NONE)
337 		state(hdlc)->dce_changed = 1;
347 		hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
349 		if (state(hdlc)->settings.lmi == LMI_NONE)
352 		if (state(hdlc)->settings.dce) {
353 			state(hdlc)->dce_changed = 1;
458 	hdlc_device *hdlc = dev_to_hdlc(dev);
460 	struct pvc_device *pvc = state(hdlc)->first_pvc;
461 	int lmi = state(hdlc)->settings.lmi;
462 	int dce = state(hdlc)->settings.dce;
469 		len += state(hdlc)->dce_pvc_count * (2 + stat_len);
498 	data[i++] = state(hdlc)->txseq =
499 		fr_lmi_nextseq(state(hdlc)->txseq);
500 	data[i++] = state(hdlc)->rxseq;
509 			if (state(hdlc)->reliable && !pvc->state.exist) {
552 	hdlc_device *hdlc = dev_to_hdlc(dev);
553 	struct pvc_device *pvc = state(hdlc)->first_pvc;
555 	state(hdlc)->reliable = reliable;
558 		state(hdlc)->n391cnt = 0; /* Request full status */
559 		state(hdlc)->dce_changed = 1;
561 		if (state(hdlc)->settings.lmi == LMI_NONE) {
575 			if (!state(hdlc)->settings.dce)
586 	hdlc_device *hdlc = dev_to_hdlc(dev);
590 	if (state(hdlc)->settings.dce) {
591 		reliable = state(hdlc)->request &&
592 			time_before(jiffies, state(hdlc)->last_poll +
593 				    state(hdlc)->settings.t392 * HZ);
594 		state(hdlc)->request = 0;
596 		state(hdlc)->last_errors <<= 1; /* Shift the list */
597 		if (state(hdlc)->request) {
598 			if (state(hdlc)->reliable)
600 			state(hdlc)->last_errors |= 1;
603 		list = state(hdlc)->last_errors;
604 		for (i = 0; i < state(hdlc)->settings.n393; i++, list >>= 1)
607 		reliable = (cnt < state(hdlc)->settings.n392);
610 	if (state(hdlc)->reliable != reliable) {
615 	if (state(hdlc)->settings.dce) {
616 		state(hdlc)->timer.expires = jiffies +
617 			state(hdlc)->settings.t392 * HZ;
619 		if (state(hdlc)->n391cnt)
620 			state(hdlc)->n391cnt--;
622 		fr_lmi_send(dev, state(hdlc)->n391cnt == 0);
624 		state(hdlc)->last_poll = jiffies;
625 		state(hdlc)->request = 1;
626 		state(hdlc)->timer.expires = jiffies +
627 			state(hdlc)->settings.t391 * HZ;
630 	add_timer(&state(hdlc)->timer);
635 	hdlc_device *hdlc = dev_to_hdlc(dev);
638 	int lmi = state(hdlc)->settings.lmi;
639 	int dce = state(hdlc)->settings.dce;
711 	state(hdlc)->rxseq = skb->data[i++]; /* TX sequence from peer */
714 	txseq = state(hdlc)->txseq;
717 		state(hdlc)->last_poll = jiffies;
720 	if (!state(hdlc)->reliable)
724 		state(hdlc)->n391cnt = 0;
729 		if (state(hdlc)->fullrep_sent && !error) {
731 			state(hdlc)->fullrep_sent = 0;
732 			pvc = state(hdlc)->first_pvc;
738 					state(hdlc)->dce_changed = 1;
744 		if (state(hdlc)->dce_changed) {
746 			state(hdlc)->fullrep_sent = 1;
747 			state(hdlc)->dce_changed = 0;
750 		state(hdlc)->request = 1; /* got request */
757 	state(hdlc)->request = 0; /* got response, no request pending */
765 	pvc = state(hdlc)->first_pvc;
830 	pvc = state(hdlc)->first_pvc;
844 	state(hdlc)->n391cnt = state(hdlc)->settings.n391;
892 	hdlc_device *hdlc = dev_to_hdlc(frad);
905 	     (state(hdlc)->settings.lmi == LMI_ANSI ||
906 	      state(hdlc)->settings.lmi == LMI_CCITT)) ||
908 	     state(hdlc)->settings.lmi == LMI_CISCO)) {
915 	pvc = find_pvc(hdlc, dlci);
998 	hdlc_device *hdlc = dev_to_hdlc(dev);
1002 	if (state(hdlc)->settings.lmi != LMI_NONE) {
1003 		state(hdlc)->reliable = 0;
1004 		state(hdlc)->dce_changed = 1;
1005 		state(hdlc)->request = 0;
1006 		state(hdlc)->fullrep_sent = 0;
1007 		state(hdlc)->last_errors = 0xFFFFFFFF;
1008 		state(hdlc)->n391cnt = 0;
1009 		state(hdlc)->txseq = state(hdlc)->rxseq = 0;
1011 		state(hdlc)->dev = dev;
1012 		timer_setup(&state(hdlc)->timer, fr_timer, 0);
1014 		state(hdlc)->timer.expires = jiffies + HZ;
1015 		add_timer(&state(hdlc)->timer);
1023 	hdlc_device *hdlc = dev_to_hdlc(dev);
1027 	if (state(hdlc)->settings.lmi != LMI_NONE)
1028 		del_timer_sync(&state(hdlc)->timer);
1034 	hdlc_device *hdlc = dev_to_hdlc(dev);
1035 	struct pvc_device *pvc = state(hdlc)->first_pvc;
1064 	hdlc_device *hdlc = dev_to_hdlc(frad);
1088 		delete_unused_pvcs(hdlc);
1111 		delete_unused_pvcs(hdlc);
1118 		state(hdlc)->dce_changed = 1;
1119 		state(hdlc)->dce_pvc_count++;
1124 static int fr_del_pvc(hdlc_device *hdlc, unsigned int dlci, int type)
1129 	pvc = find_pvc(hdlc, dlci);
1144 		state(hdlc)->dce_pvc_count--;
1145 		state(hdlc)->dce_changed = 1;
1147 	delete_unused_pvcs(hdlc);
1153 	hdlc_device *hdlc = dev_to_hdlc(frad);
1154 	struct pvc_device *pvc = state(hdlc)->first_pvc;
1156 	state(hdlc)->first_pvc = NULL; /* All PVCs destroyed */
1157 	state(hdlc)->dce_pvc_count = 0;
1158 	state(hdlc)->dce_changed = 1;
1189 	hdlc_device *hdlc = dev_to_hdlc(dev);
1202 		if (copy_to_user(fr_s, &state(hdlc)->settings, size))
1233 		result = hdlc->attach(dev, ENCODING_NRZ,
1243 			state(hdlc)->first_pvc = NULL;
1244 			state(hdlc)->dce_pvc_count = 0;
1246 		memcpy(&state(hdlc)->settings, &new_settings, size);
1278 			return fr_del_pvc(hdlc, pvc.dlci, result);