tor/src/feature/feature.md

@dir /feature @brief feature: domain-specific modules

The "feature" directory has modules that Tor uses only for a particular role or service, such as maintaining/using an onion service, operating as a relay or a client, or being a directory authority.

Current subdirectories are:

• \refdir{feature/api} -- Support for making Tor embeddable
• \refdir{feature/client} -- Functionality which only Tor clients need
• \refdir{feature/control} -- Controller implementation
• \refdir{feature/dirauth} -- Directory authority
• \refdir{feature/dircache} -- Directory cache
• \refdir{feature/dirclient} -- Directory client
• \refdir{feature/dircommon} -- Shared code between the other directory modules
• \refdir{feature/dirparse} -- Directory parsing code.
• \refdir{feature/hibernate} -- Hibernating when Tor is out of bandwidth or shutting down
• \refdir{feature/hs} -- v3 onion service implementation
• \refdir{feature/hs_common} -- shared code between both onion service implementations
• \refdir{feature/keymgt} -- shared code for key management between relays and onion services.
• \refdir{feature/nodelist} -- storing and accessing the list of relays on the network.
• \refdir{feature/relay} -- code that only relay servers and exit servers need.
• \refdir{feature/rend} -- v2 onion service implementation
• \refdir{feature/stats} -- statistics and history