[Coral-dev] Printing packet stats: 0 packets received?

[Jeff Terrell]

Hello,

I'd like to periodically print the number of packets that CoralReef
has dropped and the number it has received.  The interval
functionality seems to be a great mechanism for this.  However, I
think the statistics it is reporting to me are incorrect.

I wrote a minimal example program to demonstrate my problem, which you
can see here:

http://pastebin.com/aAZng31y

I'm reading packets from a 32-second pcap trace.  My program receives
a packet from coral_read_pkt() a total of 4,203,253 times, which is
the same as the number of packets reported by `tcpdump -nnr`.
However, the stats->pkts_recv counter (and every other counter) is 0,
both when the statistics are part of the interval received from
coral_read_pkt() as well as when the statistics are are received from
coral_get_interface_stats() at the end of the program.  The output of
the program on my pcap trace can be seen here:

http://pastebin.com/EXqe83G4

Am I misunderstanding the purpose of the pkts_recv counter?  Or am I
not using it correctly?  Or is it really broken?  Please help.

I'm running CoralReef version 3.8.6-public and libpcap version 1.0.0
on a (Linode) Ubuntu Linux v2.6.32.12-x86_64 system.

Thanks,
-Jeff T.