26 static inline int muststuff(unsigned char c)  in muststuff()  argument
28 	if (c < PPP_TRANS) return 1;  in muststuff()
29 	if (c == PPP_FLAG) return 1;  in muststuff()
30 	if (c == PPP_ESCAPE) return 1;  in muststuff()
55 	unsigned char c;  in cmd_loop()  local
58 		c = *src++;  in cmd_loop()
61 		switch (c) {  in cmd_loop()
83 			cs->respdata[0] = c;  in cmd_loop()
107 				cs->respdata[cbytes] = c;  in cmd_loop()
147 	unsigned char c;  in hdlc_loop()  local
157 		c = *src++;  in hdlc_loop()
159 		if (c == DLE_FLAG) {  in hdlc_loop()
170 		if (c == PPP_ESCAPE) {  in hdlc_loop()
178 			c = *src++;  in hdlc_loop()
180 			if (c == DLE_FLAG) {  in hdlc_loop()
192 			c ^= PPP_TRANS;  in hdlc_loop()
194 			if (!muststuff(c))  in hdlc_loop()
195 				gig_dbg(DEBUG_HDLC, "byte stuffed: 0x%02x", c);  in hdlc_loop()
197 		} else if (c == PPP_FLAG) {  in hdlc_loop()
245 		} else if (muststuff(c)) {  in hdlc_loop()
247 			gig_dbg(DEBUG_HDLC, "not byte stuffed: 0x%02x", c);  in hdlc_loop()
267 				*__skb_put(skb, 1) = c;  in hdlc_loop()
268 				fcs = crc_ccitt_byte(fcs, c);  in hdlc_loop()
293 	unsigned char c;  in iraw_loop()  local
302 		c = *src++;  in iraw_loop()
305 		if (c == DLE_FLAG) {  in iraw_loop()
318 		*__skb_put(skb, 1) = bitrev8(c);  in iraw_loop()
462 	unsigned char c;  in HDLC_Encode()  local
507 	c = (fcs & 0x00ff);	/* least significant byte first */  in HDLC_Encode()
508 	if (muststuff(c)) {  in HDLC_Encode()
510 		c ^= PPP_TRANS;  in HDLC_Encode()
512 	*(skb_put(hdlc_skb, 1)) = c;  in HDLC_Encode()
514 	c = ((fcs >> 8) & 0x00ff);  in HDLC_Encode()
515 	if (muststuff(c)) {  in HDLC_Encode()
517 		c ^= PPP_TRANS;  in HDLC_Encode()
519 	*(skb_put(hdlc_skb, 1)) = c;  in HDLC_Encode()
539 	unsigned char c;  in iraw_encode()  local
562 		c = bitrev8(*cp++);  in iraw_encode()
563 		if (c == DLE_FLAG)  in iraw_encode()
564 			*(skb_put(iraw_skb, 1)) = c;  in iraw_encode()
565 		*(skb_put(iraw_skb, 1)) = c;  in iraw_encode()