Message length checks and basic headers are not uniform across GTP-U,
GTP-C and GTP-PRIME.
Note that, even if the length checks were wrong, the GTP sessions were almost
always correctly classified because of the "guessing" algorithm.
This patch has been tested with GTP-U, GTP-C-V1, GTP-C-V2 and GPT-PRIME-V2
traffic using ndpiReader with "-d" flag (to avoid "guessing" algorithm) and
without "-t" flag (to avoid GTP-U de-tunneling).
See #1148
* Refactored and merged callback buffer routines for non-udp-tcp / udp / tcp / tcp-wo-payload.
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Try to detect one subprotocol if a detected protocol can have one.
* This adds a performance overhead due to much more protocol detection routine calls.
See #1148 for more information.
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Refactor subprotocol handling (1/2).
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Refactor subprotocol handling (2/2).
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Prevent some code duplication by using macros for ndpi_int_one_line_struct string comparision.
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Refactored aimini HTTP detection parts (somehow related to #1148).
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Added aimini client/server test pcap.
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Removed master protocol as it was only used for STUN and via also removed API function ndpi_get_protocol_id_master_proto
* Adjusted Python code to conform to the changes made during the refactoring process.
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
* Add support for Snapchat voip calls
Snapchat multiplexes some of its audio/video real time traffic with QUIC
sessions. The peculiarity of these sessions is that they are Q046 and
don't have any SNI.
* Fix tests with libgcrypt disabled
* An external file which contains known malicious SSL certificate SHA-1 hashes
can be loaded via ndpi_load_malicious_sha1_file(...)
Signed-off-by: Toni Uhlig <matzeton@googlemail.com>
