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[ns] about bpf

To: ns-users@ISI.EDU
Subject: [ns] about bpf
From: "Yao Shu" <tilly_yao@263.net>
Date: Thu, 14 Jun 2001 20:45:32 +0800 (CST)
Sender: owner-ns-users@ISI.EDU

hi,all
   I have some question about the bpf.
1,  $bpf open readonly fxp0  
Does this mean that bpf read data from the interface "fxp0",
but what kind of interface is "fxp0"?
2,  $bpf filter "icmp and dst $myaddr"
What does it mean? Is filter a function?
 thanks 

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Follow-Ups:
- Re: [ns] about bpf
  - From: Xuan Chen <xuanc@ISI.EDU>
- Re: [ns] about bpf
  - From: Di-Fa Chang <difac@usc.edu>

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