Security and Communication Networks / 2019 / Article / Alg 4

Research Article

Efficient Extraction of Network Event Types from NetFlows

Algorithm 4

Expansion of flows into version space.
1: flowWindows DistributeFlows(Flows)
2: descriptions ParseDescriptions(Descriptions, Dictionary)
3: versionSpace
4:
5: procedure EXPANDVERSIONSPACE                 flow processing
6:  for all flowWindow    flowWindows do
7:   for all flow    flowWindow do
8:    for all flowSpec    descriptions.f lowSpec do
9:     for all formula    flowSpec do
10:      if flow formula then
11:        break
12:      end if
13:     end for
14:     hashKey CreateKey(flow,flowSpec)            hashing the flow
15:     if hashKey    versionSpace.Keys then
16:      protoEvent (versionSpace hashKey)
17:      protoEvent.Flows protoEvent.Flows    flow           add flow
18:     else
19:     protoEvent                 create new proto-event
20:      protoEvent protoEvent.Flows    flow
21:      versionSpace versionSpace    (hashKey   protoEvent)
22:     end if
23:   end for
24:  end for
25: end for
26: end procedure

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