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This cache was added in b6b4967aa, when there was no real Zoom support.
With 63f349319, a proper identification of multimedia stream has been
added, making this cache quite useless: any improvements on Zoom
classification should be properly done in Zoom dissector.
Tested for some months with a few 10Gbits links of residential traffic: the
cache pretty much never returned a valid hit.
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Deciding when a session starts and ends is responsability of the
applicationi (via its flow manager)i, not of the library.
BTW, the removed code is incomplete at beast
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* Add HL7 protocol dissector
* Small fixes
* Small fixes
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* Add JSON-RPC protocol dissector
* Small fixes
* Improve detection
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Increment the counter only if the flow has been guessed
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Fix the script to download crawler addressess
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Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
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In some networks, there are some anomalous TCP flows where the smallest
ACK packets have some kind of zero padding.
It looks like the IP and TCP headers in those frames wrongly consider the
0x00 Ethernet padding bytes as part of the TCP payload.
While this kind of packets is perfectly valid per-se, in some conditions
they might be treated by the TCP reassembler logic as (partial) overlaps,
deceiving the classification engine.
Add an heuristic to detect these packets and to ignore them, allowing
correct detection/classification.
This heuristic is configurable. Default value:
* in the library, it is disabled
* in `ndpiReader` and in the fuzzers, it is enabled (to ease testing)
Credit to @vel21ripn for the initial patch.
Close #1946
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