AGGR_WIN_IDX
#define AGGR_INCR_IDX(x, y) AGGR_WIN_IDX(((x) + 1), (y))
#define AGGR_DCRM_IDX(x, y) AGGR_WIN_IDX(((x) - 1), (y))
idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
idx_end = AGGR_WIN_IDX(seq_end, rxtid->hold_q_sz);
idx = AGGR_WIN_IDX(rxtid->seq_next, rxtid->hold_q_sz);
idx = AGGR_WIN_IDX(seq_no, rxtid->hold_q_sz);