BTH5_FLAGS_SEQ_MASK
exp_rxseq = sc->sc_seq_expected_rxseq & BTH5_FLAGS_SEQ_MASK;
sc->sc_seq_expected_rxseq = (rxseq + 1) & BTH5_FLAGS_SEQ_MASK;
sc->sc_seq_txseq = (sc->sc_seq_txseq + 1) & BTH5_FLAGS_SEQ_MASK;
uint32_t seqno = (rxack - 1) & BTH5_FLAGS_SEQ_MASK;
(((n) & BTH5_FLAGS_SEQ_MASK) >> BTH5_FLAGS_SEQ_SHIFT)