taglinefilesource code
__u832include/linux/ip.h__u8  len;
__u833include/linux/ip.h__u8  ptr;
__u836include/linux/ip.h__u8  flags:4,
__u839include/linux/ip.h__u8  overflow:4,
__u842include/linux/ip.h__u8  flags:4,
__u847include/linux/ip.h__u8  full_char;
__u877include/linux/ip.h__u8  ihl:4,
__u880include/linux/ip.h__u8  version:4,
__u883include/linux/ip.h__u8  ihl:4,
__u888include/linux/ip.h__u8  tos;
__u892include/linux/ip.h__u8  ttl;
__u893include/linux/ip.h__u8  protocol;