21 #define pr_fmt(fmt) "X25: " fmt
29 #include <net/x25.h>
36 	struct x25_sock *x25 = x25_sk(sk);  in x25_clear_queues()  local
39 	skb_queue_purge(&x25->ack_queue);  in x25_clear_queues()
40 	skb_queue_purge(&x25->interrupt_in_queue);  in x25_clear_queues()
41 	skb_queue_purge(&x25->interrupt_out_queue);  in x25_clear_queues()
42 	skb_queue_purge(&x25->fragment_queue);  in x25_clear_queues()
54 	struct x25_sock *x25 = x25_sk(sk);  in x25_frames_acked()  local
55 	int modulus = x25->neighbour->extended ? X25_EMODULUS : X25_SMODULUS;  in x25_frames_acked()
60 	if (x25->va != nr)  in x25_frames_acked()
61 		while (skb_peek(&x25->ack_queue) && x25->va != nr) {  in x25_frames_acked()
62 			skb = skb_dequeue(&x25->ack_queue);  in x25_frames_acked()
64 			x25->va = (x25->va + 1) % modulus;  in x25_frames_acked()
92 	struct x25_sock *x25 = x25_sk(sk);  in x25_validate_nr()  local
93 	unsigned short vc = x25->va;  in x25_validate_nr()
94 	int modulus = x25->neighbour->extended ? X25_EMODULUS : X25_SMODULUS;  in x25_validate_nr()
96 	while (vc != x25->vs) {  in x25_validate_nr()
102 	return nr == x25->vs ? 1 : 0;  in x25_validate_nr()
111 	struct x25_sock *x25 = x25_sk(sk);  in x25_write_internal()  local
130 		if (x25->facilities.reverse & 0x80) {  in x25_write_internal()
165 	lci1 = (x25->lci >> 8) & 0x0F;  in x25_write_internal()
166 	lci2 = (x25->lci >> 0) & 0xFF;  in x25_write_internal()
168 	if (x25->neighbour->extended) {  in x25_write_internal()
184 			len     = x25_addr_aton(addresses, &x25->dest_addr,  in x25_write_internal()
185 						&x25->source_addr);  in x25_write_internal()
188 					&x25->facilities,  in x25_write_internal()
189 					&x25->dte_facilities,  in x25_write_internal()
190 					x25->neighbour->global_facil_mask);  in x25_write_internal()
192 			skb_put_data(skb, x25->calluserdata.cuddata,  in x25_write_internal()
193 				     x25->calluserdata.cudlength);  in x25_write_internal()
194 			x25->calluserdata.cudlength = 0;  in x25_write_internal()
200 			*dptr++ = 0x00;		/* Address lengths */  in x25_write_internal()
202 							&x25->facilities,  in x25_write_internal()
203 							&x25->dte_facilities,  in x25_write_internal()
204 							x25->vc_facil_mask);  in x25_write_internal()
210 			if(x25->facilities.reverse & 0x80) {  in x25_write_internal()
212 					     x25->calluserdata.cuddata,  in x25_write_internal()
213 					     x25->calluserdata.cudlength);  in x25_write_internal()
215 			x25->calluserdata.cudlength = 0;  in x25_write_internal()
221 			*dptr++ = x25->causediag.cause;  in x25_write_internal()
222 			*dptr++ = x25->causediag.diagnostic;  in x25_write_internal()
228 			*dptr++ = 0x00;		/* XXX */  in x25_write_internal()
229 			*dptr++ = 0x00;		/* XXX */  in x25_write_internal()
235 			if (x25->neighbour->extended) {  in x25_write_internal()
238 				*dptr++  = (x25->vr << 1) & 0xFE;  in x25_write_internal()
242 				*dptr++ |= (x25->vr << 5) & 0xE0;  in x25_write_internal()
254 	x25_transmit_link(skb, x25->neighbour);  in x25_write_internal()
263 	struct x25_sock *x25 = x25_sk(sk);  in x25_decode()  local
270 	*ns = *nr = *q = *d = *m = 0;  in x25_decode()
289 	if (x25->neighbour->extended) {  in x25_decode()
297 			*nr = (frame[3] >> 1) & 0x7F;  in x25_decode()
301 		if ((frame[2] & 0x1F) == X25_RR  ||  in x25_decode()
302 		    (frame[2] & 0x1F) == X25_RNR ||  in x25_decode()
303 		    (frame[2] & 0x1F) == X25_REJ) {  in x25_decode()
304 			*nr = (frame[2] >> 5) & 0x07;  in x25_decode()
305 			return frame[2] & 0x1F;  in x25_decode()
309 	if (x25->neighbour->extended) {  in x25_decode()
310 		if ((frame[2] & 0x01) == X25_DATA) {  in x25_decode()
315 			*q  = (frame[0] & X25_Q_BIT) == X25_Q_BIT;  in x25_decode()
316 			*d  = (frame[0] & X25_D_BIT) == X25_D_BIT;  in x25_decode()
318 			*nr = (frame[3] >> 1) & 0x7F;  in x25_decode()
319 			*ns = (frame[2] >> 1) & 0x7F;  in x25_decode()
323 		if ((frame[2] & 0x01) == X25_DATA) {  in x25_decode()
324 			*q  = (frame[0] & X25_Q_BIT) == X25_Q_BIT;  in x25_decode()
325 			*d  = (frame[0] & X25_D_BIT) == X25_D_BIT;  in x25_decode()
327 			*nr = (frame[2] >> 5) & 0x07;  in x25_decode()
328 			*ns = (frame[2] >> 1) & 0x07;  in x25_decode()
341 	struct x25_sock *x25 = x25_sk(sk);  in x25_disconnect()  local
346 	x25->lci   = 0;  in x25_disconnect()
347 	x25->state = X25_STATE_0;  in x25_disconnect()
349 	x25->causediag.cause      = cause;  in x25_disconnect()
350 	x25->causediag.diagnostic = diagnostic;  in x25_disconnect()
360 	if (x25->neighbour) {  in x25_disconnect()
362 		x25_neigh_put(x25->neighbour);  in x25_disconnect()
363 		x25->neighbour = NULL;  in x25_disconnect()
374 	struct x25_sock *x25 = x25_sk(sk);  in x25_check_rbuf()  local
377 	    (x25->condition & X25_COND_OWN_RX_BUSY)) {  in x25_check_rbuf()
378 		x25->condition &= ~X25_COND_OWN_RX_BUSY;  in x25_check_rbuf()
379 		x25->condition &= ~X25_COND_ACK_PENDING;  in x25_check_rbuf()
380 		x25->vl         = x25->vr;  in x25_check_rbuf()