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* Fix value of `ndpi_protocol->protocol_by_ip`Nardi Ivan2022-09-25
| | | | Fix: a7c2734b
* Sizes of LRU caches are now configurableNardi Ivan2022-09-23
| | | | | | | | 0 as size value disable the cache. The diffs in unit tests are due to the fact that some lookups are performed before the first insert: before this change these lookups weren't counted because the cache was not yet initialized, now they are.
* DNS: change category of DNS flowsNardi Ivan2022-09-22
| | | | | DNS flows should have `NDPI_PROTOCOL_CATEGORY_NETWORK` as category, regardless of the subprotocol (if any).
* Remove classification "by-ip" from protocol stack (#1743)Ivan Nardi2022-09-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Basically: * "classification by-ip" (i.e. `flow->guessed_protocol_id_by_ip` is NEVER returned in the protocol stack (i.e. `flow->detected_protocol_stack[]`); * if the application is interested into such information, it can access `ndpi_protocol->protocol_by_ip` itself. There are mainly 4 points in the code that set the "classification by-ip" in the protocol stack: the generic `ndpi_set_detected_protocol()`/ `ndpi_detection_giveup()` functions and the HTTP/STUN dissectors. In the unit tests output, a print about `ndpi_protocol->protocol_by_ip` has been added for each flow: the huge diff of this commit is mainly due to that. Strictly speaking, this change is NOT an API/ABI breakage, but there are important differences in the classification results. For examples: * TLS flows without the initial handshake (or without a matching SNI/certificate) are simply classified as `TLS`; * similar for HTTP or QUIC flows; * DNS flows without a matching request domain are simply classified as `DNS`; we don't have `DNS/Google` anymore just because the server is 8.8.8.8 (that was an outrageous behaviour...); * flows previusoly classified only "by-ip" are now classified as `NDPI_PROTOCOL_UNKNOWN`. See #1425 for other examples of why adding the "classification by-ip" in the protocol stack is a bad idea. Please, note that IPV6 is not supported :( (long standing issue in nDPI) i.e. `ndpi_protocol->protocol_by_ip` wil be always `NDPI_PROTOCOL_UNKNOWN` for IPv6 flows. Define `NDPI_CONFIDENCE_MATCH_BY_IP` has been removed. Close #1687
* Fix `ndpi_do_guess()` (#1731)Ivan Nardi2022-09-12
| | | | | Avoid a double call of `ndpi_guess_host_protocol_id()`. Some code paths work for ipv4/6 both Remove some never used code.
* STUN: several improvementsNardi Ivan2022-09-11
| | | | | | | | | Add detection over TCP and fix detection over IPv6. Rename some variables since Stun dissector is no more "udp-centric". Stun dissector should always classified the flow as `STUN` or `STUN/Something`. Don't touch `flow->guessed_host_protocol_id` field, which should be always be related to "ip-classification" only.
* Avoid useless host automa lookup (#1724)Ivan Nardi2022-09-05
| | | | | | | | | | | | | | | | | | | The host automa is used for two tasks: * protocol sub-classification (obviously); * DGA evaluation: the idea is that if a domain is present in this automa, it can't be a DGA, regardless of its format/name. In most dissectors both checks are executed, i.e. the code is something like: ``` ndpi_match_host_subprotocol(..., flow->host_server_name, ...); ndpi_check_dga_name(..., flow->host_server_name,...); ``` In that common case, we can perform only one automa lookup: if we check the sub-classification before the DGA, we can avoid the second lookup in the DGA function itself.
* Add FastCGI protocol detection. (#1711)Toni2022-08-24
| | | | | | | | * CQL: fixed byte order conversion (BigEndian not LittleEndian) * CQL: increased required successful dissected packets to prevent false-positives Signed-off-by: Toni Uhlig <matzeton@googlemail.com> Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Add Kismet protocol detection. (#1710)Toni2022-08-24
| | | | | Signed-off-by: Toni Uhlig <matzeton@googlemail.com> Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Add TiVoConnect dissector. Fixes #1697. (#1699)Toni2022-08-08
| | | | | * added static assert if supported, to complain if the flow struct changes Signed-off-by: lns <matzeton@googlemail.com>
* TLS: avoid useless extra dissection (#1690)Ivan Nardi2022-07-31
| | | | | | | If we have seen Application Data blocks in both directions, it means we are after the handshake. At that point, extra dissection is useless. Useful feature with TLS mid-sessions, i.e. sessions without initial packets.
* Patricia tree, Ahocarasick automa, LRU cache: add statistics (#1683)Ivan Nardi2022-07-29
| | | | | | | | | | Add (basic) internal stats to the main data structures used by the library; they might be usefull to check how effective these structures are. Add an option to `ndpiReader` to dump them; enabled by default in the unit tests. This new option enables/disables dumping of "num dissectors calls" values, too (see b4cb14ec).
* TINC: avoid processing SYN packets (#1676)Ivan Nardi2022-07-28
| | | | | | | | | | | Since e6b332aa, we have proper support for detecting client/server direction. So Tinc dissector is now able to properly initialize the cache entry only when needed and not anymore at the SYN time; initializing that entry for **every** SYN packets was a complete waste of resources. Since 4896dabb, the various `struct ndpi_call_function_struct` structures are not more separate objects and therefore comparing them using only their pointers is bogus: this bug was triggered by this change because `ndpi_str->callback_buffer_size_tcp_no_payload` is now 0.
* Update the protocol bitmask for some protocols (#1675)Ivan Nardi2022-07-27
| | | | | | | Tcp retransmissions should be ignored. Remove some unused protocol bitmasks. Update script to download Whatsapp IP list.
* Add AVAST dissector. (#1674)Toni2022-07-25
| | | Signed-off-by: lns <matzeton@googlemail.com>
* Added AliCloud server access dissector. (#1672)Toni2022-07-23
| | | | Signed-off-by: lns <matzeton@googlemail.com> Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* SKYPE: remove detection over TCPNardi Ivan2022-07-20
| | | | | | Skype detection over TCP has been completely disable since 659f75138 (3 years ago!). Since that logic was too weak anyway, remove it.
* Improved Jabber/XMPP detection. (#1661)Toni2022-07-13
| | | Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Keep track of how many dissectors calls we made for each flow (#1657)Ivan Nardi2022-07-11
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* Avoid spurious calls to extra dissection (#1648)Ivan Nardi2022-07-07
| | | | If the extra callabck is not set, calling the extra dissection is only a waste of resources...
* Fix handling of NDPI_UNIDIRECTIONAL_TRAFFIC risk (#1636)Ivan Nardi2022-07-05
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* Enhanced TLS risk info reported to usersLuca Deri2022-06-28
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* Added unidirectional traffic flow riskLuca Deri2022-06-20
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* Updated DNS alert triggered only with TTL == 0Luca Deri2022-06-14
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* Improved DNS traffic analysisLuca Deri2022-06-13
| | | | Added ability to identify application and network protocols
* Updated tests resultsLuca Deri2022-05-30
| | | | Code cleanup
* Improved TLS alert detection. (#1542)Toni2022-05-08
| | | Signed-off-by: lns <matzeton@googlemail.com>
* Improved TLS application data detection. (#1541)Toni2022-05-08
| | | | | | * #1532 did fx TLS appdata detection only partially * use flow->l4.tcp.tls.message.buffer_used instead of packet->payload Signed-off-by: lns <matzeton@googlemail.com>
* Sync unit tests results (#1533)Ivan Nardi2022-04-27
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* Improved TLS application data detection. (#1532)Toni2022-04-27
| | | Signed-off-by: lns <matzeton@googlemail.com>
* Add some scripts to easily update some IPs lists (#1522)Ivan Nardi2022-04-21
| | | | | Follow-up of 8b062295 Add a new protocol id for generic Tencent/Wechat flows
* 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.
* ndpiReader: slight simplificaton of the output (#1378)Ivan Nardi2021-11-27
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* Fixed cleartext protocol assignment (#1357)Ivan Nardi2021-10-25
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* Refreshed results listLuca Deri2021-10-16
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* Updated test results after latest commitLuca Deri2021-10-16
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* Fix parsing of ipv6 packets with extension headersNardi Ivan2021-09-19
| | | | | | | | Decoding of ipv6 traffic with extension headers was completely broken, since the beginning of the L4 header was always set to a wrong value. Handle the ipv6 fragments in the same way as the ipv4 ones: keep the first one and drop the others.
* Updated outputLuca Deri2021-08-07
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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.
* Improved TLS browser detection heuristicsLuca Deri2021-05-19
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* Added flow risk scoreLuca Deri2021-05-18
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* Added browser TLS heuristicLuca Deri2021-05-13
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* 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
* Modified JA3 fingerprint messageLuca Deri2021-02-24
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* Added NDPI_MALICIOUS_JA3 flow riskLuca Deri2021-02-22
| | | | Added ndpi_load_malicious_ja3_file() API call
* Improved nDPI string matching algorithmLuca Deri2021-02-18
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* QUIC: improve handling of SNI (#1105)Ivan Nardi2021-01-07
| | | | | | | | | | | | | * QUIC: SNI should be always saved in flow->protos.stun_ssl.ssl.client_requested_server_name Close #1077 * QUIC: fix matching of custom categories * QUIC: add NDPI_TLS_MISSING_SNI support for older GQUIC versions * QUIC: fix serialization * QUIC: add DGA check for older GQUIC versions
* 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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