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* Add IEC62056 (DLMS/COSEM) protocol dissector
* Fix detection on big endian architectures
* Update protocols.rst
* Add ndpi_crc16_x25 to fuzz/fuzz_alg_crc32_md5.c
* Update pcap sample
* Remove empty .out file
* iec62056: add some documentation
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Co-authored-by: Nardi Ivan <nardi.ivan@gmail.com>
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* Add some fast CRC16 algorithms implementation
* Update ndpi_crc.c
* Move crc16 stuff to ndpi_analyze.c
* IEEE C37.118: use new fast CRC-16/CCITT-FALSE implementation
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We are not able to remove custom rules: remove the empty stubs (which
originate from the original OpenDPI code).
`ndpi_guess_protocol_id()` is only called on the first packet of the
flow, so the bitmask `flow->excluded_protocol_bitmask` is always empty,
since we didn't call any dissectors yet.
Move another hash function to the dedicated source file.
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A fully encrypted session is a flow where every bytes of the
payload is encrypted in an attempt to “look like nothing”.
The heuristic needs only the very first packet of the flow.
See: https://www.usenix.org/system/files/sec23fall-prepub-234-wu-mingshi.pdf
A basic, but generic, inplementation of the popcpunt alg has been added
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Remove `FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION` define from
`fuzz/Makefile.am`; it is already included by the main configure script
(when fuzzing).
Add a knob to force disabling of AESNI optimizations: this way we can
fuzz also no-aesni crypto code.
Move CRC32 algorithm into the library.
Add some fake traces to extend fuzzing coverage. Note that these traces
are hand-made (via scapy/curl) and must not be used as "proof" that the
dissectors are really able to identify this kind of traffic.
Some small updates to some dissectors:
CSGO: remove a wrong rule (never triggered, BTW). Any UDP packet starting
with "VS01" will be classified as STEAM (see steam.c around line 111).
Googling it, it seems right so.
XBOX: XBOX only analyses UDP flows while HTTP only TCP ones; therefore
that condition is false.
RTP, STUN: removed useless "break"s
Zattoo: `flow->zattoo_stage` is never set to any values greater or equal
to 5, so these checks are never true.
PPStream: `flow->l4.udp.ppstream_stage` is never read. Delete it.
TeamSpeak: we check for `flow->packet_counter == 3` just above, so the
following check `flow->packet_counter >= 3` is always false.
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