* Note that mbufs with undetermined SA (session-less) are not freed
* by the function, but are placed beyond mbufs for the last valid group.
* It is a user responsibility to handle them further.
* Note that mbufs with undetermined SA (session-less) are not freed
* by the function, but are placed beyond mbufs for the last valid group.
* It is a user responsibility to handle them further.