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跑leach需要的

Description: 
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dosreduce creates a reduced network topology from 
a larger inet topolgy based on intersection of attacker and 
crosstraffic paths. The nodes and links that donot intersect 
with the attack tree are pruned to create a reduced network 
topology.

Input:
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dosreduce accepts the network topology in an inet topology file 
and the number of attackers and active crosstraffic connections 
at the command line.

Output:
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Based on the intersection of the attack tree and crosstraffic paths,
it outputs the attacker and victim nodes and required nodes and links
in the reduced topology.  

Usage:
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dosreduce inet_topology #attackers #activeconnections