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* Updated test resultsLuca Deri2022-02-03
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* Sync unit tests results (#1423)Ivan Nardi2022-01-28
| | | Fix: 7a3aa41a
* Add a "confidence" field about the reliability of the classification. (#1395)Ivan Nardi2022-01-11
| | | | | | | | | | | | | As a general rule, the higher the confidence value, the higher the "reliability/precision" of the classification. In other words, this new field provides an hint about "how" the flow classification has been obtained. For example, the application may want to ignore classification "by-port" (they are not real DPI classifications, after all) or give a second glance at flows classified via LRU caches (because of false positives). Setting only one value for the confidence field is a bit tricky: more work is probably needed in the next future to tweak/fix/improve the logic.
* Improve/add several protocols (#1383)Ivan Nardi2021-12-18
| | | | | | | | | | | | | | | | | | | Improve Microsoft, GMail, Likee, Whatsapp, DisneyPlus and Tiktok detection. Add Vimeo, Fuze, Alibaba and Firebase Crashlytics detection. Try to differentiate between Messenger/Signal standard flows (i.e chat) and their VOIP (video)calls (like we already do for Whatsapp and Snapchat). Add a partial list of some ADS/Tracking stuff. Fix Cassandra, Radius and GTP false positives. Fix DNS, Syslog and SIP false negatives. Improve GTP (sub)classification: differentiate among GTP-U, GTP_C and GTP_PRIME. Fix 3 LGTM warnings.
* ndpiReader: slight simplificaton of the output (#1378)Ivan Nardi2021-11-27
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* Rework how hostname/SNI info is saved (#1330)Ivan Nardi2021-11-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | Looking at `struct ndpi_flow_struct` the two bigger fields are `host_server_name[240]` (mainly for HTTP hostnames and DNS domains) and `protos.tls_quic.client_requested_server_name[256]` (for TLS/QUIC SNIs). This commit aims to reduce `struct ndpi_flow_struct` size, according to two simple observations: 1) maximum one of these two fields is used for each flow. So it seems safe to merge them; 2) even if hostnames/SNIs might be very long, in practice they are rarely longer than a fews tens of bytes. So, using a (single) large buffer is a waste of memory for all kinds of flows. If we need to truncate the name, we keep the *last* characters, easing domain matching. Analyzing some real traffic, it seems safe to assume that the vast majority of hostnames/SNIs is shorter than 80 bytes. Hostnames/SNIs are always converted to lowercase. Attention was given so as to be sure that unit-tests outputs are not affected by this change. Because of a bug, TLS/QUIC SNI were always truncated to 64 bytes (the *first* 64 ones): as a consequence, there were some "Suspicious DGA domain name" and "TLS Certificate Mismatch" false positives.
* Fix writes to `flow->protos` union fields (#1354)Ivan Nardi2021-11-15
| | | | | | | | | | | | | | | | | | | | | | | | | We can write to `flow->protos` only after a proper classification. This issue has been found in Kerberos, DHCP, HTTP, STUN, IMO, FTP, SMTP, IMAP and POP code. There are two kinds of fixes: * write to `flow->protos` only if a final protocol has been detected * move protocol state out of `flow->protos` The hard part is to find, for each protocol, the right tradeoff between memory usage and code complexity. Handle Kerberos like DNS: if we find a request, we set the protocol and an extra callback to further parsing the reply. For all the other protocols, move the state out of `flow->protos`. This is an issue only for the FTP/MAIL stuff. Add DHCP Class Identification value to the output of ndpiReader and to the Jason serialization. Extend code coverage of fuzz tests. Close #1343 Close #1342
* Detect invalid characters in text and set a risk. Fixes #1347. (#1363)Toni2021-10-26
| | | Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Updated test results after latest commitLuca Deri2021-10-16
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* Removed outdated (and broken) soulseek dissectorLuca Deri2021-10-15
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* Fix unit test results after 00857abf (#1295)Ivan Nardi2021-09-11
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* Fixed some invalid TLS guessesLuca Deri2021-08-17
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* Updated outputLuca Deri2021-08-07
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* Reworked flow risk implementationLuca Deri2021-07-23
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* Updated download category nameLuca Deri2021-07-16
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* ndpiReader: add statistics about nDPI performance (#1240)Ivan Nardi2021-07-13
| | | | | | | The goal is to have a (roughly) idea about how many packets nDPI needs to properly classify a flow. Log this information (and guessed flows number too) during unit tests, to keep track of improvements/regressions across commits.
* Updated category labelsLuca Deri2021-07-08
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* Added flow risk scoreLuca Deri2021-05-18
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* Fixed invalid DNS dissectionLuca Deri2021-04-26
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* Improved DGA detectionLuca Deri2021-03-03
| | | | | | | | Before Accuracy 66%, Precision 86%, Recall 38% After Accuracy 71%, Precision 89%, Recall 49%
* Improved DGA detection with trigrams. Disadvantage: slower startup timeLuca Deri2021-03-03
| | | | | Reworked Tor dissector embedded in TLS (fixes #1141) Removed false positive on HTTP User-Agent
* Improved DNS dissectorLuca Deri2021-02-26
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* Fixes #1029Luca Deri2020-11-27
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* Reworked MDNS dissector that is not based on the DNS dissectorLuca Deri2020-09-17
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* Added new risk for NDPI_UNSAFE_PROTOCOL that identifies protocols that are ↵Luca Deri2020-08-30
| | | | not condidered safe/secure
* Fixed false positive in suspicous user agentLuca Deri2020-08-30
| | | | Optimized stddev calculation
* Changed due to bin size extensionLuca Deri2020-07-30
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* Updated test results due to bin changesLuca Deri2020-07-09
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* Added malformed packet risk supportLuca Deri2020-06-26
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* Fixes #906Luca Deri2020-06-22
| | | | Packet bins are not printed wehn empty
* Added ndpi_bin_XXX APILuca Deri2020-06-22
| | | | Added packet lenght distribution bins
* Added fuzz-2006-06-26-2594.pcap fuzzy pcapLuca Deri2020-03-23
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