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ARPAddEntry Crashes iMac on System 9.0

We discovered in testing that ARPAddEntry() from ARPerations.c from
ARPSample can cause an iMac (Bondi,Rev.A) running System 9 or 9.0.4 to
crash (OpenTransport version 2.5.2 and 2.6.1). In some cases we
immediatelly get a notice that the IP address selected is already in use
and the TCP stack is shutdown. In most cases, the machine just crashes.

After lots of debugging and testing with ARPSample we discovered that the
problem occurs when a hardware address that is different from the machine
is specified and the PUBLISH flag is used.

The flags are not well documented (that I can find). My expectation was
that the PUBLISH flag allowed the ARP module to respond to requests for
this IP address with the specified hardware address. Basically
implementing a proxy ARP. This seems to work from our minimal testing on
other systems but on the iMac Rev.A this combination crashes the machine.

Can I get a better explaination of the PUBLISH flag? Is it supposed to do
as I described or something different? Is there a workaround to this bug?
Or is this even a bug? (Well, it crashes so that must be some kind of
bug). Obviously this bug cant be fixed, but is there a workaround? Or
should I just not use PUBLISH?

Thanks for the help,

...Duane
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