PTP_CLASS_IPV6     40 include/linux/ptp_classify.h #define PTP_CLASS_V1_IPV6 (PTP_CLASS_V1 | PTP_CLASS_IPV6) /* probably DNE */
PTP_CLASS_IPV6     42 include/linux/ptp_classify.h #define PTP_CLASS_V2_IPV6 (PTP_CLASS_V2 | PTP_CLASS_IPV6)