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README: Mention the possibility to capture traces using tcpdump

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Marcel Holtmann 2014-08-10 12:48:40 -07:00
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commit 05c6ecbeff
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@ -93,6 +93,19 @@ needs to be created:
For now it is important that the netlink monitor interace is actually For now it is important that the netlink monitor interace is actually
named nlmon. Future version might relax this requirement. named nlmon. Future version might relax this requirement.
It is possible to create netlink traces in PCAP format using tcpdump
and then read them via iwmon utility:
tcpdump -i nlmon -w trace-file.pcap
The resulting PCAP files will use Linux cooked packet format containing
packets with ARPHRD_NETLINK type. They can be read using iwmon:
iwmon -r trace-file.pcap
At this time iwmon is not able to write PCAP files by itself. This might
change in future versions.
Simulating devices Simulating devices
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