Retrieving network information from the kernel

[Mark Andrews]

Our company has a number of 4D's using NFS. We would like to write a tool
which monitors traffic on the network. Is there a way to determine the
correct interface, then read the actual ethernet packets from the interface.
I just took a look at LBL's tcpdump program which was written on a sun and
uses the nit(4) interface. It would be nice to have something like that on
the 4D's which support several types of ethernet interfaces (enp, ec, ...).

If there is a common kernel symbol used by the network code, I could always
nlist() the kernel and read the packets from the appropriate location, but
I gather it is not that easy.


					Thanks for any info,

						Mark
------------------------------------------------------------------------------
	Mark Andrews
	Systems Programmer,
	Alias Research,
	Toronto, Canada
Phone:	(416)-362-9181
UUCP:	mark%alias at csri.utoronto.ca