taglinefilesource code
__u834include/linux/ip.h__u8  len;
__u835include/linux/ip.h__u8  ptr;
__u838include/linux/ip.h__u8  flags:4,
__u841include/linux/ip.h__u8  overflow:4,
__u844include/linux/ip.h__u8  flags:4,
__u849include/linux/ip.h__u8  full_char;
__u879include/linux/ip.h__u8  ihl:4,
__u882include/linux/ip.h__u8  version:4,
__u885include/linux/ip.h__u8  ihl:4,
__u890include/linux/ip.h__u8  tos;
__u894include/linux/ip.h__u8  ttl;
__u895include/linux/ip.h__u8  protocol;