Netgraph ng_bridge status message missing last three values?

I'm diagnosing a system that uses the Netgraph ng_bridge node to bridge two Ethernet segments and the system seems to stop passing traffic at randomly-triggered points (somewhat annoying for a system half a world away behind a very restrictive firewall :-)

I've installed a cron job to dump the Netgraph bridge status messages to a log file every few minutes. However, I've found that the ng_bridge status message looks like this:

> ngctl msg bnet0: getstats 0
STATS=Rec'd response "getstats" (4) from "[10]:":
Args: { recvOctets=474229151 recvPackets=3322699 recvMulticast=128640 recvBroadcast=105813 recvUnknown=2372 xmitOctets=516954216 xmitPackets=2968420 xmitMulticasts=8 xmitBroadcasts=339 }

but to aid diagnosis I would really like to see several values that, according to ng_bridge.h, are in the stats structure, including
recvRunts, recvInvalid, loopDrops, loopDetects, and memoryFailures. It looks like all the code is there to report the values of these variables, but I can't seem to find anything that is dropping these variables from ngctl's output.

Any help is greatly appreciated,
Guy

--
Guy Helmer, Ph.D.
Chief System Architect
Palisade Systems, Inc.

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