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* 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>
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Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
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* added static assert if supported, to complain if the flow struct changes
Signed-off-by: lns <matzeton@googlemail.com>
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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).
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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.
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Tcp retransmissions should be ignored.
Remove some unused protocol bitmasks.
Update script to download Whatsapp IP list.
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Signed-off-by: lns <matzeton@googlemail.com>
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Treat HTTP-Proxy and HTTP-Connect flows like the HTTP ones:
print/serialize all the attributes and allow parsing of replies.
The line about "1kxun" has been removed to avoid regressions in 1KXUN
classification in `tests/pcap/1kxun.pcap`. I haven't fully understod
what was happening but the comment at the beginning of `static
ndpi_category_match category_match[]` says that we can't have overlaps
between `host_match` and `category_match` lists and that is no longer true
since 938e89ca.
Bottom line: removing this line seems the right thing to do, anyway.
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In a lot of places in ndPI we use *packet* source/dest info
(address/port/direction) when we are interested in *flow* client/server
info, instead.
Add basic logic to autodetect this kind of information.
nDPI doesn't perform any "flow management" itself but this task is
delegated to the external application. It is then likely that the
application might provide more reliable hints about flow
client/server direction and about the TCP handshake presence: in that case,
these information might be (optionally) passed to the library, disabling
the internal "autodetect" logic.
These new fields have been used in some LRU caches and in the "guessing"
algorithm.
It is quite likely that some other code needs to be updated.
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Signed-off-by: lns <matzeton@googlemail.com>
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
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Skype detection over TCP has been completely disable since 659f75138 (3
years ago!).
Since that logic was too weak anyway, remove it.
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Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
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If the extra callabck is not set, calling the extra dissection is only a
waste of resources...
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Added ability to identify application and network protocols
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Code cleanup
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Signed-off-by: lns <matzeton@googlemail.com>
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Signed-off-by: lns <matzeton@googlemail.com>
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* ndpiReader: Print user agent if one was set and not just for certain protocols.
Signed-off-by: lns <matzeton@googlemail.com>
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Follow-up of 8b062295
Add a new protocol id for generic Tencent/Wechat flows
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Fix: 7a3aa41a
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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.
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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.
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Added ndpi_load_malicious_ja3_file() API call
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Improved AnyDesk detection
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invalidate dissection
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