public bool xr_get_summary_pkt (out uint32 lost_packets, out uint32 dup_packets)
Get the number of lost or duplicate packets.
If the flag in a block header is set as zero,
dup_packets will be zero.
a valid XR Packet which has Statics Summary Report Block.
the number of lost packets between begin_seq and end_seq.
the number of duplicate packets between begin_seq and end_seq.