On May 18, 2019, at 3:05 PM, Damir Franusic <damir.franu...@gmail.com> wrote:

> I know it's extensible but ELEE is used for different purpose

LINKTYPE_ELEE is used for the *same* purpose as pcapng - recording timestamped 
network events, and metadata for those events and for the capture process, in a 
file.

"Target PDUs" with a subtype of "Content of Communication", and that just 
contain raw packet data (as opposed to the ASN.1 stuff I asked about in an 
earlier message) are just pcapng Enhanced Packet Blocks:

        the target identifier and sequence number in the Target PDU header 
would be options;

        the timestamp would either just be the block's timestamp (and, unlike 
ELEE with its 32-bit Timestamp_sec, would work past Y2.106K);

        the "target activity flag for CC data", "handover connection name for 
CC data delivery", "destination directory for CC data delivery used only for 
file system based connections" (if relevant here), "target aggregation factor 
for CC data delivery", "communication identifier Operator Id", "communication 
identifier Network Element Id", and "communication identifier Number" would 
also be options.

"Target PDUs" with a subtype of "Content of Communication" that contain that 
ETSI-specified ASN.1 data would be a new block type, using the same options as 
the new EPB options;

"Target PDUs" with a subtype of "Intercept Related Information (IRI)" would be 
one or more new block types, depending on whether to have a single block type 
for all of them, possibly using options.
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