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* Fix some errors found by fuzzers (#2078)Ivan Nardi2023-09-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix compilation on Windows. "dirent.h" file has been taken from https://github.com/tronkko/dirent/ Fix Python bindings Fix some warnings with x86_64-w64-mingw32-gcc: ``` protocols/dns.c: In function ‘ndpi_search_dns’: protocols/dns.c:775:41: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] 775 | unsigned long first_element_len = (unsigned long)dot - (unsigned long)_hostname; | ^ protocols/dns.c:775:62: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast] 775 | unsigned long first_element_len = (unsigned long)dot - (unsigned long)_hostname; | ``` ``` In file included from ndpi_bitmap64.c:31: third_party/include/binaryfusefilter.h: In function ‘binary_fuse8_hash’: third_party/include/binaryfusefilter.h:160:32: error: left shift count >= width of type [-Werror=shift-count-overflow] 160 | uint64_t hh = hash & ((1UL << 36) - 1); ``` ``` In function ‘ndpi_match_custom_category’, inlined from ‘ndpi_fill_protocol_category.part.0’ at ndpi_main.c:7056:16: ndpi_main.c:3419:3: error: ‘strncpy’ specified bound depends on the length of the source argument [-Werror=stringop-overflow=] 3419 | strncpy(buf, name, name_len); ```
* Swap from Aho-Corasick to an experimental/home-grown algorithm that uses a ↵Luca Deri2023-08-29
probabilistic approach for handling Internet domain names. For switching back to Aho-Corasick it is necessary to edit ndpi-typedefs.h and uncomment the line // #define USE_LEGACY_AHO_CORASICK [1] With Aho-Corasick $ ./example/ndpiReader -G ./lists/ -i tests/pcap/ookla.pcap | grep Memory nDPI Memory statistics: nDPI Memory (once): 37.34 KB Flow Memory (per flow): 960 B Actual Memory: 33.09 MB Peak Memory: 33.09 MB [2] With the new algorithm $ ./example/ndpiReader -G ./lists/ -i tests/pcap/ookla.pcap | grep Memory nDPI Memory statistics: nDPI Memory (once): 37.31 KB Flow Memory (per flow): 960 B Actual Memory: 7.42 MB Peak Memory: 7.42 MB In essence from ~33 MB to ~7 MB This new algorithm will enable larger lists to be loaded (e.g. top 1M domans https://s3-us-west-1.amazonaws.com/umbrella-static/index.html) In ./lists there are file names that are named as <category>_<string>.list With -G ndpiReader can load all of them at startup