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* build: update m4/ax_pthread.m4 from serial 23 -> serial 31 Update ax_pthread.m4 to the latest version from the autoconf-archive project. Signed-off-by: Sam James <sam@gentoo.org> * build: properly detect AR, CC, RANLIB It's necessary to be able to override choice of AR/CC/RANLIB and other toolchain variables/tools for cross-compilation, testing with other toolchains, and to ensure the compiler chosen by the user is actually used for the build. Previously, GNU_PREFIX was kind-of used for this but this isn't a standard variable (at all) and it wasn't applied consistently anyway. We now use the standard autoconf mechanisms for finding these tools. (RANLIB is already covered by LT_INIT.) Signed-off-by: Sam James <sam@gentoo.org> * build: use $(MAKE) This ensures that parallel make works correctly, as otherwise, a fresh make job will be started without the jobserver fd, and hence not know about its parent, forcing -j1. * build: respect CPPFLAGS, LDFLAGS - CPPFLAGS is for the C preprocessor (usually for setting defines) - LDFLAGS should be placed before objects for certain flags to work (e.g. -Wl,--as-needed) Signed-off-by: Sam James <sam@gentoo.org> Co-authored-by: Luca Deri <lucaderi@users.noreply.github.com> |
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nDPI
What is nDPI ?
nDPI® is an open source LGPLv3 library for deep-packet inspection. Based on OpenDPI it includes ntop extensions. We have tried to push them into the OpenDPI source tree but nobody answered emails so we have decided to create our own source tree
How To Compile nDPI
In order to compile this library do
- ./autogen.sh
- ./configure
- make
To run tests do additionally:
- cd tests; ./do.sh
Please note that the pre-requisites for compilation include:
- GNU tools (autogen, automake, autoconf, libtool)
- GNU C compiler (gcc)
On Debian/Ubuntu systems do:
- sudo apt-get install build-essential git bison flex libpcap-dev libtool libtool-bin autoconf pkg-config automake autogen libjson-c-dev libnuma-dev libgcrypt20-dev libpcre2-dev
FreeBSD
- sudo pkg install gcc git autoconf automake libtool devel/pkgconf json-c gmake
Remember to use gmake and not make on FreeBSD
How To Add A New Protocol Dissector
The entire procedure of adding new protocols in detail:
- Add new protocol together with its unique ID to: src/include/ndpi_protocol_ids.h
- Create a new protocol in: src/lib/protocols/
- Variables to be kept for the duration of the entire flow (as state variables) need to be placed in: src/include/ndpi_typedefs.h in ndpi_flow_tcp_struct (for TCP only), ndpi_flow_udp_struct (for UDP only), or ndpi_flow_struct (for both).
- Add a new entry for the search function for the new protocol in: src/include/ndpi_protocols.h
- Choose (do not change anything) a selection bitmask from: src/include/ndpi_define.h
- Add a new entry in ndpi_set_protocol_detection_bitmask2 in: src/lib/ndpi_main.c
- Set protocol default ports in ndpi_init_protocol_defaults in: src/lib/ndpi_main.c
- ./autogen.sh
- make
- make check
How to use nDPI to Block Selected Traffic
You can use nDPI to selectively block selected Internet traffic by embedding it onto an application (remember that nDPI is just a library). Both ntopng and nProbe cento can do this.
nDPI Paper Citation
- Deri, Luca, et al. nDPI: Open-source high-speed deep packet inspection 2014 International Wireless Communications and Mobile Computing Conference (IWCMC). IEEE, 2014.
nDPI-Related Projects
DISCLAIMER
While we do our best to detect network protocols, we cannot guarantee that our software is error free and 100% accurate in protocol detection. Please make sure that you respect the privacy of users and you have proper authorization to listen, capture and inspect network traffic.
nDPI is a registered trademark in the US and EU.