From: Wayne Schroeder <raz@positivenetworks.net>
To: netfilter-devel@lists.netfilter.org
Subject: What basic sanity checking on packet headers is done
Date: Fri, 29 Sep 2006 11:20:53 -0500 [thread overview]
Message-ID: <451D47E5.7000108@positivenetworks.net> (raw)
I've written a new target module that uses the ip header fields of ihl
and tot_len for offsets into the packets. How safe is the data in the
ip headers? Is there sanity checking when the packet is received off
the wire... for instance -- is it safe to assume in the prerouting chain
of the mangle table that tot_len will not put me past the memory
allocated for the packet? Same goes for ihl?
Wayne
next reply other threads:[~2006-09-29 16:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-29 16:20 Wayne Schroeder [this message]
2006-09-29 16:50 ` What basic sanity checking on packet headers is done Patrick McHardy
2006-09-29 16:59 ` Wayne Schroeder
2006-09-29 17:14 ` Patrick McHardy
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