Hi,
I am writing a small utility that converts .etl network trace files produced by
netsh trace into pcapng format. The interface information is right at the end
of the ETL file, but I need to create IDBs near the start of the pcapng file.
I don't want to hold a whole converted trace file in memory and I'd prefer not
to shuffle the data around in the pcapng file. My plan is:
* Write an "IDB segment" of null bytes where the IDB will go - enough to
accomodate the maximum anticipated IDB blocks, say 2 KB
* Once I get to the interface data in the ETL, seek back to the "IDB
Segment"
* Write the IDBs
* Pad the "IDB segment" with the equivalent of NoOps
There is no NoOp block type and so I'm thinking of using a Custom Block
* Would using a Custom Block in this way cause problems?
* What value should I use for the Private Enterprise Number (PEN)?
* Is there a better way of doing this?
Thanks and regards...Paul
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