26 #define pr_fmt(fmt) "X25: " fmt
34 #include <net/x25.h>
41 	struct x25_sock *x25 = x25_sk(sk);  in x25_clear_queues()  local
44 	skb_queue_purge(&x25->ack_queue);  in x25_clear_queues()
45 	skb_queue_purge(&x25->interrupt_in_queue);  in x25_clear_queues()
46 	skb_queue_purge(&x25->interrupt_out_queue);  in x25_clear_queues()
47 	skb_queue_purge(&x25->fragment_queue);  in x25_clear_queues()
59 	struct x25_sock *x25 = x25_sk(sk);  in x25_frames_acked()  local
60 	int modulus = x25->neighbour->extended ? X25_EMODULUS : X25_SMODULUS;  in x25_frames_acked()
65 	if (x25->va != nr)  in x25_frames_acked()
66 		while (skb_peek(&x25->ack_queue) && x25->va != nr) {  in x25_frames_acked()
67 			skb = skb_dequeue(&x25->ack_queue);  in x25_frames_acked()
69 			x25->va = (x25->va + 1) % modulus;  in x25_frames_acked()
97 	struct x25_sock *x25 = x25_sk(sk);  in x25_validate_nr()  local
98 	unsigned short vc = x25->va;  in x25_validate_nr()
99 	int modulus = x25->neighbour->extended ? X25_EMODULUS : X25_SMODULUS;  in x25_validate_nr()
101 	while (vc != x25->vs) {  in x25_validate_nr()
107 	return nr == x25->vs ? 1 : 0;  in x25_validate_nr()
116 	struct x25_sock *x25 = x25_sk(sk);  in x25_write_internal()  local
135 		if (x25->facilities.reverse & 0x80) {  in x25_write_internal()
170 	lci1 = (x25->lci >> 8) & 0x0F;  in x25_write_internal()
171 	lci2 = (x25->lci >> 0) & 0xFF;  in x25_write_internal()
173 	if (x25->neighbour->extended) {  in x25_write_internal()
189 			len     = x25_addr_aton(addresses, &x25->dest_addr,  in x25_write_internal()
190 						&x25->source_addr);  in x25_write_internal()
193 					&x25->facilities,  in x25_write_internal()
194 					&x25->dte_facilities,  in x25_write_internal()
195 					x25->neighbour->global_facil_mask);  in x25_write_internal()
197 			skb_put_data(skb, x25->calluserdata.cuddata,  in x25_write_internal()
198 				     x25->calluserdata.cudlength);  in x25_write_internal()
199 			x25->calluserdata.cudlength = 0;  in x25_write_internal()
205 			*dptr++ = 0x00;		/* Address lengths */  in x25_write_internal()
207 							&x25->facilities,  in x25_write_internal()
208 							&x25->dte_facilities,  in x25_write_internal()
209 							x25->vc_facil_mask);  in x25_write_internal()
215 			if(x25->facilities.reverse & 0x80) {  in x25_write_internal()
217 					     x25->calluserdata.cuddata,  in x25_write_internal()
218 					     x25->calluserdata.cudlength);  in x25_write_internal()
220 			x25->calluserdata.cudlength = 0;  in x25_write_internal()
226 			*dptr++ = x25->causediag.cause;  in x25_write_internal()
227 			*dptr++ = x25->causediag.diagnostic;  in x25_write_internal()
233 			*dptr++ = 0x00;		/* XXX */  in x25_write_internal()
234 			*dptr++ = 0x00;		/* XXX */  in x25_write_internal()
240 			if (x25->neighbour->extended) {  in x25_write_internal()
243 				*dptr++  = (x25->vr << 1) & 0xFE;  in x25_write_internal()
247 				*dptr++ |= (x25->vr << 5) & 0xE0;  in x25_write_internal()
259 	x25_transmit_link(skb, x25->neighbour);  in x25_write_internal()
268 	struct x25_sock *x25 = x25_sk(sk);  in x25_decode()  local
275 	*ns = *nr = *q = *d = *m = 0;  in x25_decode()
294 	if (x25->neighbour->extended) {  in x25_decode()
302 			*nr = (frame[3] >> 1) & 0x7F;  in x25_decode()
306 		if ((frame[2] & 0x1F) == X25_RR  ||  in x25_decode()
307 		    (frame[2] & 0x1F) == X25_RNR ||  in x25_decode()
308 		    (frame[2] & 0x1F) == X25_REJ) {  in x25_decode()
309 			*nr = (frame[2] >> 5) & 0x07;  in x25_decode()
310 			return frame[2] & 0x1F;  in x25_decode()
314 	if (x25->neighbour->extended) {  in x25_decode()
315 		if ((frame[2] & 0x01) == X25_DATA) {  in x25_decode()
320 			*q  = (frame[0] & X25_Q_BIT) == X25_Q_BIT;  in x25_decode()
321 			*d  = (frame[0] & X25_D_BIT) == X25_D_BIT;  in x25_decode()
323 			*nr = (frame[3] >> 1) & 0x7F;  in x25_decode()
324 			*ns = (frame[2] >> 1) & 0x7F;  in x25_decode()
328 		if ((frame[2] & 0x01) == X25_DATA) {  in x25_decode()
329 			*q  = (frame[0] & X25_Q_BIT) == X25_Q_BIT;  in x25_decode()
330 			*d  = (frame[0] & X25_D_BIT) == X25_D_BIT;  in x25_decode()
332 			*nr = (frame[2] >> 5) & 0x07;  in x25_decode()
333 			*ns = (frame[2] >> 1) & 0x07;  in x25_decode()
346 	struct x25_sock *x25 = x25_sk(sk);  in x25_disconnect()  local
351 	x25->lci   = 0;  in x25_disconnect()
352 	x25->state = X25_STATE_0;  in x25_disconnect()
354 	x25->causediag.cause      = cause;  in x25_disconnect()
355 	x25->causediag.diagnostic = diagnostic;  in x25_disconnect()
365 	if (x25->neighbour) {  in x25_disconnect()
367 		x25_neigh_put(x25->neighbour);  in x25_disconnect()
368 		x25->neighbour = NULL;  in x25_disconnect()
379 	struct x25_sock *x25 = x25_sk(sk);  in x25_check_rbuf()  local
382 	    (x25->condition & X25_COND_OWN_RX_BUSY)) {  in x25_check_rbuf()
383 		x25->condition &= ~X25_COND_OWN_RX_BUSY;  in x25_check_rbuf()
384 		x25->condition &= ~X25_COND_ACK_PENDING;  in x25_check_rbuf()
385 		x25->vl         = x25->vr;  in x25_check_rbuf()