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Date: Tue, 14 Oct 2008 17:47:46 -0700
From: "alan yang" <alancyang@gmail.com>
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Cc: 
Subject: tracing pf code
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hello,

for pf port on freebsd, i would like to trace the packet flow, looking
at from ether_input -> etiher_demux -> ip_input -> tcp_input where /
how pf handles / process the packet.

can people shed some lights where to start.  really appreciate.