Tested in Emulab testbed:
before:
enable_time_secs=1682519173 enable_time_usecs=838336 siftrver=1.3.0 sysname=FreeBSD sysver=1400088 ipmode=4
o,0x00000000,1682519173.838365,155.98.38.121,22,155.98.33.74,60892,1073725440,14552,1026,66048,66048,9,9,4,1460,37937,1,16778212,260000,33580,148,65700,0,104,0,0,0
o,0x00000000,1682519173.838379,155.98.38.121,22,155.98.33.74,60892,1073725440,14552,1026,66048,66048,9,9,4,1460,37937,1,16778212,260000,33580,184,65700,0,148,0,0,0
...
disable_time_secs=1682519176 disable_time_usecs=079243 num_inbound_tcp_pkts=9 num_outbound_tcp_pkts=8 total_tcp_pkts=17 num_inbound_skipped_pkts_malloc=0 num_outbound_skipped_pkts_malloc=0 num_inbound_skipped_pkts_tcpcb=0 num_outbound_skipped_pkts_tcpcb=0 num_inbound_skipped_pkts_inpcb=0 num_outbound_skipped_pkts_inpcb=0 total_skipped_tcp_pkts=0 flow_list=155.98.38.121;22-155.98.33.74;60892,
after:
enable_time_secs=1682518987 enable_time_usecs=256874 siftrver=1.3.0 sysname=FreeBSD sysver=1400088 ipmode=4
i,1682518987.256902,155.98.38.121,22,155.98.33.74,60892,1073725440,14480,1026,66048,66048,9,9,4,1460,39593,1,16778212,263000,33580,104,65700,0,104,0,0,0
o,1682518987.256915,155.98.38.121,22,155.98.33.74,60892,1073725440,14584,1026,66048,66048,9,9,4,1460,35656,1,16778212,285000,33580,44,65700,0,0,0,0,0
...
disable_time_secs=1682518997 disable_time_usecs=159312 num_inbound_tcp_pkts=23 num_outbound_tcp_pkts=18 total_tcp_pkts=41 num_inbound_skipped_pkts_malloc=0 num_outbound_skipped_pkts_malloc=0 num_inbound_skipped_pkts_tcpcb=0 num_outbound_skipped_pkts_tcpcb=0 num_inbound_skipped_pkts_inpcb=0 num_outbound_skipped_pkts_inpcb=0 total_skipped_tcp_pkts=0 flow_list=155.98.38.121;22-155.98.33.74;60892,