Interface State Transition

Interface state is calculated as below
If all sockets request a filter-mode of INCLUDE, then interface state is INCLUDE with the union source lists.
If any sockets request a filter-mode of EXCLUDE, then interface state is EXCLUDE with the intersection of all EXCLUDE source lists subtracting the union of all INCLUDE source lists.

Action on change of interface state
    Old State     New State    State-Change Record Sent
    ----------    ----------   -------------------------
    INCLUDE(A)    INCLUDE(B)    ALLOW(B-A), BLOCK(A-B)
    EXCLUDE(A)    EXCLUDE(B)    ALLOW(A-B), BLOCK(B-A)
    INCLUDE(A)    EXCLUDE(B)    TO_EX(B)
    EXCLUDE(A)    INCLUDE(B)    TO_IN(B)