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No traces and no flows has been removed; only long sessions
has been reduced, keeping only their first packets.
This is quite important in fuzzing systems, since these pcaps are used
as initial seed. There is no value in fuzzing long sessions, because
only the very first packets are really used/processed by nDPI.
Before:
```
du -h tests/pcap/
200M tests/pcap/
```
After:
```
du -h tests/pcap/
98M tests/pcap/
```
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Now there is at least one flow under `tests/pcap` for 249 protocols out
of the 284 ones supported by nDPI.
The 35 protocols without any tests are:
* P2P/sharing protocols: DIRECT_DOWNLOAD_LINK, OPENFT, FASTTRACK,
EDONKEY, SOPCAST, THUNDER, APPLEJUICE, DIRECTCONNECT, STEALTHNET
* games: CSGO, HALFLIFE2, ARMAGETRON, CROSSFIRE, DOFUS, FIESTA,
FLORENSIA, GUILDWARS, MAPLESTORY, WORLD_OF_KUNG_FU
* voip/streaming: VHUA, ICECAST, SHOUTCAST, TVUPLAYER, TRUPHONE
* other: AYIYA, SOAP, TARGUS_GETDATA, RPC, ZMQ, REDIS, VMWARE, NOE,
LOTUS_NOTES, EGP, SAP
Most of these protocols (expecially the P2P and games ones) have been
inherited by OpenDPI and have not been updated since then: even if they
are still used, the detection rules might be outdated.
However code coverage (of `lib/protocols`) only increases from 65.6% to
68.9%.
Improve Citrix, Corba, Fix, Aimini, Megaco, PPStream, SNMP and Some/IP
dissection.
Treat IPP as a HTTP sub protocol.
Fix Cassandra false positives.
Remove `NDPI_PROTOCOL_QQLIVE` and `NDPI_PROTOCOL_REMOTE_SCAN`:
these protocol ids are defined but they are never used.
Remove Collectd support: its code has never been called. If someone is
really interested in this protocol, we can re-add it later, updating the
dissector.
Add decoding of PPI (Per-Packet Information) data link type.
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