The mip6_bu_sec_fsm() function is the entry point of the secondary state machine of a binding update list entry.
1507–1511 The mip6_bu_sec_fsm() function has three parameters, which are as the same as the parameters for the mip6_bu_pri_fsm() function.
1530 The mbu_sec_fsm_state pointer points to the mbu_sec_fsm_state variable, which indicates the status of the secondary state machine. This variable is used as a shortcut to the mbu_sec_fsm_state variable.
1533–1534 In the secondary state machine, ...