42 	memset(hdlc, 0, sizeof(struct isdnhdlc_vars));  in isdnhdlc_rcv_init()
53 	memset(hdlc, 0, sizeof(struct isdnhdlc_vars));  in isdnhdlc_out_init()
58 		hdlc->dchannel = 0;  in isdnhdlc_out_init()
60 		hdlc->ffvalue = 0x7e;  in isdnhdlc_out_init()
62 	hdlc->cbin = 0x7e;  in isdnhdlc_out_init()
80 	else if (hdlc->crc != 0xf0b8)	/* crc error */  in check_frame()
96   the frame is found, the bit stuffing is removed (0 after 5 1's).
121 	int status = 0;  in isdnhdlc_decode()
124 		0x00, 0x00, 0x00, 0x20, 0x30, 0x38, 0x3c, 0x3e, 0x3f  in isdnhdlc_decode()
128 		0x00, 0x7e, 0xfc, 0xf9, 0xf3, 0xe7, 0xcf, 0x9f, 0x3f  in isdnhdlc_decode()
132 		0x00, 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff  in isdnhdlc_decode()
144 			h->data_received = 0;				\  in isdnhdlc_decode()
146 	} while (0)  in isdnhdlc_decode()
152 		if (h->hdlc_bits1 < 0)				\  in isdnhdlc_decode()
153 			h->hdlc_bits1 = 0;			\  in isdnhdlc_decode()
156 		h->data_received = 0;				\  in isdnhdlc_decode()
157 	} while (0)  in isdnhdlc_decode()
161 	while (slen > 0) {  in isdnhdlc_decode()
162 		if (hdlc->bit_shift == 0) {  in isdnhdlc_decode()
164 			if (hdlc->do_bitreverse == 0)  in isdnhdlc_decode()
176 			return 0;  in isdnhdlc_decode()
178 			if (hdlc->cbin == 0xff) {  in isdnhdlc_decode()
179 				hdlc->bit_shift = 0;  in isdnhdlc_decode()
183 			hdlc->hdlc_bits1 = 0;  in isdnhdlc_decode()
187 			if (!(hdlc->cbin & 0x80)) {  in isdnhdlc_decode()
189 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_decode()
200 			if (hdlc->cbin & 0x80) {  in isdnhdlc_decode()
205 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_decode()
210 			if (hdlc->cbin & 0x80) {  in isdnhdlc_decode()
214 				hdlc->crc = 0xffff;  in isdnhdlc_decode()
215 				hdlc->shift_reg = 0;  in isdnhdlc_decode()
216 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_decode()
217 				hdlc->data_bits = 0;  in isdnhdlc_decode()
218 				hdlc->data_received = 0;  in isdnhdlc_decode()
224 			if (hdlc->cbin & 0x80) {  in isdnhdlc_decode()
246 					hdlc->shift_reg |= 0x80;  in isdnhdlc_decode()
257 					hdlc->crc = 0xffff;  in isdnhdlc_decode()
258 					hdlc->shift_reg = 0;  in isdnhdlc_decode()
259 					hdlc->data_bits = 0;  in isdnhdlc_decode()
264 						hdlc->data_received = 0;  in isdnhdlc_decode()
272 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_decode()
275 				hdlc->dstpos = 0;  in isdnhdlc_decode()
282 				hdlc->data_bits = 0;  in isdnhdlc_decode()
293 					hdlc->dstpos = 0;  in isdnhdlc_decode()
301 				hdlc->bit_shift = 0;  in isdnhdlc_decode()
304 				if (hdlc->cbin == 0xff) {  in isdnhdlc_decode()
306 					hdlc->bit_shift = 0;  in isdnhdlc_decode()
319 	return 0;  in isdnhdlc_decode()
327   (0 after 5 1's).
331   If this function is called with empty source buffer (slen=0), flags or
345 		0x7e, 0x3f, 0x9f, 0xcf, 0xe7, 0xf3, 0xf9, 0xfc, 0x7e  in isdnhdlc_encode()
348 	int len = 0;  in isdnhdlc_encode()
355 	while (dsize > 0) {  in isdnhdlc_encode()
356 		if (hdlc->bit_shift == 0) {  in isdnhdlc_encode()
360 				if (slen == 0)  in isdnhdlc_encode()
368 						hdlc->crc ^= 0xffff;  in isdnhdlc_encode()
371 							hdlc->crc & 0xff;  in isdnhdlc_encode()
386 				*dst++ = 0xff;  in isdnhdlc_encode()
389 			hdlc->do_closing = 0;  in isdnhdlc_encode()
390 			if (slen == 0) {  in isdnhdlc_encode()
392 				if (hdlc->do_bitreverse == 0)  in isdnhdlc_encode()
406 				hdlc->crc = 0xffff;  in isdnhdlc_encode()
407 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
412 			hdlc->do_closing = 0;  in isdnhdlc_encode()
415 			hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
428 			if (slen == 0) {  in isdnhdlc_encode()
434 				hdlc->crc = 0xffff;  in isdnhdlc_encode()
435 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
443 				hdlc->crc = 0xffff;  in isdnhdlc_encode()
444 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
449 			if (hdlc->shift_reg & 0x01)  in isdnhdlc_encode()
453 			if (hdlc->bit_shift == 0) {  in isdnhdlc_encode()
455 				hdlc->crc = 0xffff;  in isdnhdlc_encode()
456 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
463 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
469 			if (hdlc->shift_reg & 0x01) {  in isdnhdlc_encode()
475 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
484 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
487 			if (hdlc->shift_reg & 0x01) {  in isdnhdlc_encode()
493 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
497 			if (hdlc->bit_shift == 0) {  in isdnhdlc_encode()
507 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
510 			if (hdlc->shift_reg & 0x01) {  in isdnhdlc_encode()
516 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
520 			if (hdlc->bit_shift == 0) {  in isdnhdlc_encode()
521 				hdlc->shift_reg = 0x7e;  in isdnhdlc_encode()
530 				hdlc->hdlc_bits1 = 0;  in isdnhdlc_encode()
533 			if (hdlc->shift_reg & 0x01)  in isdnhdlc_encode()
537 			if (hdlc->bit_shift == 0) {  in isdnhdlc_encode()
541 					hdlc->ffvalue = 0x7e;  in isdnhdlc_encode()
544 					if (hdlc->bit_shift == 0)  in isdnhdlc_encode()
551 						hdlc->data_received = 0;  in isdnhdlc_encode()
554 						hdlc->data_received = 0;  in isdnhdlc_encode()
563 			hdlc->do_closing = 0;  in isdnhdlc_encode()
568 			if (hdlc->bit_shift == 0) {  in isdnhdlc_encode()
570 				hdlc->bit_shift = 0;  in isdnhdlc_encode()
574 			hdlc->do_closing = 0;  in isdnhdlc_encode()
575 			hdlc->cbin = 0xff;  in isdnhdlc_encode()
578 				hdlc->cbin = 0x7e;  in isdnhdlc_encode()
582 				if (hdlc->do_bitreverse == 0)  in isdnhdlc_encode()
586 				hdlc->bit_shift = 0;  in isdnhdlc_encode()
587 				hdlc->data_bits = 0;  in isdnhdlc_encode()
589 				dsize = 0;  in isdnhdlc_encode()
604 			if (hdlc->do_bitreverse == 0)  in isdnhdlc_encode()
608 			hdlc->data_bits = 0;  in isdnhdlc_encode()