36 static void x25_transmit_restart_confirmation(struct x25_neigh *nb);
37 static void x25_transmit_restart_request(struct x25_neigh *nb);
42 static inline void x25_start_t20timer(struct x25_neigh *nb)  in x25_start_t20timer()  argument
44 	mod_timer(&nb->t20timer, jiffies + nb->t20);  in x25_start_t20timer()
49 	struct x25_neigh *nb = from_timer(nb, t, t20timer);  in x25_t20timer_expiry()  local
51 	x25_transmit_restart_request(nb);  in x25_t20timer_expiry()
53 	x25_start_t20timer(nb);  in x25_t20timer_expiry()
56 static inline void x25_stop_t20timer(struct x25_neigh *nb)  in x25_stop_t20timer()  argument
58 	del_timer(&nb->t20timer);  in x25_stop_t20timer()
61 static inline int x25_t20timer_pending(struct x25_neigh *nb)  in x25_t20timer_pending()  argument
63 	return timer_pending(&nb->t20timer);  in x25_t20timer_pending()
69 void x25_link_control(struct sk_buff *skb, struct x25_neigh *nb,  in x25_link_control()  argument
77 		confirm = !x25_t20timer_pending(nb);  in x25_link_control()
78 		x25_stop_t20timer(nb);  in x25_link_control()
79 		nb->state = X25_LINK_STATE_3;  in x25_link_control()
81 			x25_transmit_restart_confirmation(nb);  in x25_link_control()
85 		x25_stop_t20timer(nb);  in x25_link_control()
86 		nb->state = X25_LINK_STATE_3;  in x25_link_control()
104 	if (nb->state == X25_LINK_STATE_3)  in x25_link_control()
105 		while ((skbn = skb_dequeue(&nb->queue)) != NULL)  in x25_link_control()
106 			x25_send_frame(skbn, nb);  in x25_link_control()
112 static void x25_transmit_restart_request(struct x25_neigh *nb)  in x25_transmit_restart_request()  argument
125 	*dptr++ = nb->extended ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;  in x25_transmit_restart_request()
133 	x25_send_frame(skb, nb);  in x25_transmit_restart_request()
139 static void x25_transmit_restart_confirmation(struct x25_neigh *nb)  in x25_transmit_restart_confirmation()  argument
152 	*dptr++ = nb->extended ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;  in x25_transmit_restart_confirmation()
158 	x25_send_frame(skb, nb);  in x25_transmit_restart_confirmation()
165 void x25_transmit_clear_request(struct x25_neigh *nb, unsigned int lci,  in x25_transmit_clear_request()  argument
179 	*dptr++ = ((lci >> 8) & 0x0F) | (nb->extended ?  in x25_transmit_clear_request()
189 	x25_send_frame(skb, nb);  in x25_transmit_clear_request()
192 void x25_transmit_link(struct sk_buff *skb, struct x25_neigh *nb)  in x25_transmit_link()  argument
194 	switch (nb->state) {  in x25_transmit_link()
196 		skb_queue_tail(&nb->queue, skb);  in x25_transmit_link()
197 		nb->state = X25_LINK_STATE_1;  in x25_transmit_link()
198 		x25_establish_link(nb);  in x25_transmit_link()
202 		skb_queue_tail(&nb->queue, skb);  in x25_transmit_link()
205 		x25_send_frame(skb, nb);  in x25_transmit_link()
213 void x25_link_established(struct x25_neigh *nb)  in x25_link_established()  argument
215 	switch (nb->state) {  in x25_link_established()
217 		nb->state = X25_LINK_STATE_2;  in x25_link_established()
220 		x25_transmit_restart_request(nb);  in x25_link_established()
221 		nb->state = X25_LINK_STATE_2;  in x25_link_established()
222 		x25_start_t20timer(nb);  in x25_link_established()
232 void x25_link_terminated(struct x25_neigh *nb)  in x25_link_terminated()  argument
234 	nb->state = X25_LINK_STATE_0;  in x25_link_terminated()
236 	x25_kill_by_neigh(nb);  in x25_link_terminated()
244 	struct x25_neigh *nb = kmalloc(sizeof(*nb), GFP_ATOMIC);  in x25_link_device_up()  local
246 	if (!nb)  in x25_link_device_up()
249 	skb_queue_head_init(&nb->queue);  in x25_link_device_up()
250 	timer_setup(&nb->t20timer, x25_t20timer_expiry, 0);  in x25_link_device_up()
253 	nb->dev      = dev;  in x25_link_device_up()
254 	nb->state    = X25_LINK_STATE_0;  in x25_link_device_up()
255 	nb->extended = 0;  in x25_link_device_up()
259 	nb->global_facil_mask = X25_MASK_REVERSE |  in x25_link_device_up()
263 	nb->t20      = sysctl_x25_restart_request_timeout;  in x25_link_device_up()
264 	refcount_set(&nb->refcnt, 1);  in x25_link_device_up()
267 	list_add(&nb->node, &x25_neigh_list);  in x25_link_device_up()
278 static void __x25_remove_neigh(struct x25_neigh *nb)  in __x25_remove_neigh()  argument
280 	skb_queue_purge(&nb->queue);  in __x25_remove_neigh()
281 	x25_stop_t20timer(nb);  in __x25_remove_neigh()
283 	if (nb->node.next) {  in __x25_remove_neigh()
284 		list_del(&nb->node);  in __x25_remove_neigh()
285 		x25_neigh_put(nb);  in __x25_remove_neigh()
294 	struct x25_neigh *nb;  in x25_link_device_down()  local
300 		nb = list_entry(entry, struct x25_neigh, node);  in x25_link_device_down()
302 		if (nb->dev == dev) {  in x25_link_device_down()
303 			__x25_remove_neigh(nb);  in x25_link_device_down()
316 	struct x25_neigh *nb, *use = NULL;  in x25_get_neigh()  local
321 		nb = list_entry(entry, struct x25_neigh, node);  in x25_get_neigh()
323 		if (nb->dev == dev) {  in x25_get_neigh()
324 			use = nb;  in x25_get_neigh()
341 	struct x25_neigh *nb;  in x25_subscr_ioctl()  local
356 	if ((nb = x25_get_neigh(dev)) == NULL)  in x25_subscr_ioctl()
363 		x25_subscr.extended	     = nb->extended;  in x25_subscr_ioctl()
364 		x25_subscr.global_facil_mask = nb->global_facil_mask;  in x25_subscr_ioctl()
373 			nb->extended	     = x25_subscr.extended;  in x25_subscr_ioctl()
374 			nb->global_facil_mask = x25_subscr.global_facil_mask;  in x25_subscr_ioctl()
378 	x25_neigh_put(nb);  in x25_subscr_ioctl()
392 	struct x25_neigh *nb;  in x25_link_free()  local
400 		nb = list_entry(entry, struct x25_neigh, node);  in x25_link_free()
401 		dev = nb->dev;  in x25_link_free()
402 		__x25_remove_neigh(nb);  in x25_link_free()