usr_handle 121 include/uapi/linux/tipc.h char usr_handle[8]; /* available for subscriber use */ usr_handle 569 net/tipc/topsrv.c *(u32 *)&sub.usr_handle = port; usr_handle 600 net/tipc/topsrv.c u32 port = *(u32 *)&evt->s.usr_handle;