590 	uint16_t crc;  in ppp_check_fcs()  local
597 	crc = crc16_ccitt(0xffff, buf->data, buf->len);  in ppp_check_fcs()
602 		crc = crc16_ccitt(crc, buf->data, buf->len);  in ppp_check_fcs()
606 	if (crc != 0xf0b8) {  in ppp_check_fcs()
607 		LOG_DBG("Invalid FCS (0x%x)", crc);  in ppp_check_fcs()
764 	uint16_t crc;  in calc_fcs()  local
775 	crc = crc16_ccitt(0xffff, (const uint8_t *)&c, sizeof(c));  in calc_fcs()
778 		crc = crc16_ccitt(crc, (const uint8_t *)&protocol,  in calc_fcs()
783 		crc = crc16_ccitt(crc, buf->data, buf->len);  in calc_fcs()
787 	crc ^= 0xffff;  in calc_fcs()
788 	*fcs = crc;  in calc_fcs()