$Id: HACKING 38307 2021-11-23 19:01:05Z fyodor $ Nmap HACKING ------------ Information for potential Nmap hackers! Source is provided to Nmap because we believe users have a right to know exactly what a program is going to do before they run it. This also allows you to audit the software for security holes (none have been found so far). Source code also allows you to port Nmap to new platforms, fix bugs, and add new features. You are highly encouraged to send your changes to dev@nmap.org for possible incorporation into the main distribution. By sending these changes to Fyodor or one of the Insecure.Org development mailing lists, it is assumed that you are offering the Nmap Project (Nmap Software LLC) unlimited, non-exclusive right to reuse, modify, and relicense the code. This is important because the inability to relicense code has caused devastating problems for other Free Software projects (such as KDE and NASM). Nmap will always be available Open Source. If you wish to specify special license conditions of your contributions, just say so when you send them. Nmap is a community project and has already benefited greatly from outside contributors (for examples, see the CHANGELOG at https://nmap.org/changelog.html). Bugfixes, and portability changes will almost always be accepted. Even if you do not have time to track down and patch a problem, bug reports are always welcome. Hackers interested in something more major, such as a new feature, are encouraged to send a mail describing their plans to dev@nmap.org . This is a good way to solicit feedback on your proposals. List members are often very willing to help. You might want to subscribe to that mailing list as well -- send a blank email to dev-subscribe@nmap.org . While you are at it, you might also want to subscribe to announce@nmap.org via the same mechanism. Web archives of those lists are at http://seclists.org . Some ideas of useful contributions/projects ------------------------------------------- Of course, you are welcome to work on whatever suits your fancy. But some ideas of contributions that might be particularly useful are listed in the todo file, available in todo/nmap.txt or online at https://svn.nmap.org/nmap/todo/nmap.txt o Bug reports and feature requests at http://issues.nmap.org/ are a good place to look for ideas. o Script ideas page. Writing NSE scripts is an excellent way to contribute to the project. You can add your script ideas to our wiki page, or pick one and implement it. See: https://secwiki.org/w/Nmap_Script_Ideas o Nmap GUI improvements -- Zenmap is the Nmap GUI. If you have enhancement ideas, give it a shot! Alternatively, consider contributing to the NmapSI and Umit projects available at http://www.nmapsi4.org and http://umit.sourceforge.net respectively. There are also other satellite projects, with different level of activity, such as NmapGUI (http://sourceforge.net/projects/nmapgui) or Nmap::parser (http://rubynmap.sourceforge.net). One of the best ways to help is to join the nmap-dev list ( https://nmap.org/mailman/listinfo/dev ). Requests for assistance and new Nmap-related projects are often posted there. How to make code contributions ------------------------------ The preferred mechanism for submitted changes is unified diffs against the latest SVN trunk. Please send them to dev@nmap.org . Get a local copy of the SVN trunk: svn co https://svn.nmap.org/nmap Make your changes. Then make a unified diff, by issuing the following command: svn diff > nmap.patch If you've added several features, it's best to send them as several independent patches if you can. We also accept Github Pull Requests at https://github.com/nmap/nmap Style ----- Code style guidelines and quality checking tools are documented at https://secwiki.org/w/Nmap/Code_Standards . The short version is: * Indent with 2 spaces, not tabs * No trailing whitespace * Be consistent * Use comments Credits ------- I got the idea for this HACKING file from GNet (http://www.gnetlibrary.org/) and followed the general structure of their HACKING file.