Hi Nick,
That's pretty weird. The code in FromDevice.u is pretty simple itself; on OS
X it's a wrapper around the pcap library. There is no queue inside FromDevice
itself. Perhaps this is related to the select()/poll() problems others
reported. Can you confirm that tcpdump works as expected, generating packets
one at a time? Does OS X pcap support pcap_setnonblock()?
(config-userlevel.h should have HAVE_PCAP_SETNONBLOCK.) If not, can you try
to get rid of the fcntl() on fromdevice.cc:230?
Eddie
Nicholas Weaver wrote:
> I'm seeing some very weird behavior under OSX on FromDevice...
>
> The very simple code:
> FromDevice(en0, PROMISC true) -> Print("en0") -> Queue -> ToDevice(en1);
>
> What happens is no packets are received by the Print command until
> some internal buffer in the FromDevice fills up, and then they are all
> delivered at once in a big burst, through the queue, and out the en1
> interface.
>
> Suggestions?
>
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