Path: utzoo!news-server.csri.toronto.edu!utgpu!cunews!bnrgate!brtph3!brchh104!brchs1!bnr.ca!rice.edu!sun-spots-request
From: roy@alanine.phri.nyu.edu (Roy Smith)
Newsgroups: comp.sys.sun
Subject: Nit(4) picking
Keywords: Miscellaneous
Message-ID: <1875@brchh104.bnr.ca>
Date: 15 Mar 91 22:44:00 GMT
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Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
X-Original-Date: Wed, 27 Feb 91 17:01:25 EST
X-Sun-Spots-Digest: Volume 10, Issue 51, message 10
X-Note: Submissions: sun-spots@rice.edu, Admin: sun-spots-request@rice.edu

I'm trying to use NIT(4P) under SunOS-3.5.2, but the documentation is, how
shall I put it, less than crystal clear.  Can somebody explain to me how
it works?  I followed the example in the man page, and can grab packets
off the wire, but can't decode them in any way that makes sense.  I
suspect that somehow I'm starting to decode at the wrong place in the
buffer; I really can't figure out for the life of me what nioc_chunksize,
nioc_snaplen, nioc_bufalign, and nioc_buffoffset mean.

I also can't figure out what values go in the nh_state part of the nit
header.  The packet I'm looking at right now has 5 there, which according
to the man page means "sequence number of chunk" but I can't assign any
useful meaning to that sequence of english words in this context.

Roy Smith, Public Health Research Institute
455 First Avenue, New York, NY 10016
roy@alanine.phri.nyu.edu -OR- {att,cmcl2,rutgers,hombre}!phri!roy