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conduwuit/DIFFERENCES.md

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list of features, bug fixes, etc that conduwuit does that upstream does not:

  • Fixed every single clippy (default lints) and rustc warnings, including some that were performance related or potential safety issues / unsoundness
  • Has dependabot and significantly updates all dependencies possible
  • Uses proper argon2 crate instead of questionable rust-argon2 crate
  • Improved and cleaned up logging (less noisy dead server logging, registration attempts, more useful troubleshooting logging, etc)
  • Attempts and interest in removing extreme and unnecessary panics/unwraps/expects that can lead to denial of service or such (upstream and upstream contributors want this unusual behaviour for some reason)
  • Merged and cleaned up upstream MRs that have been sitting for 6-12 months
  • Using latest rust-rocksdb git for the latest RocksDB release which has various fixes, features, improvements, etc, including some regarding database corruption.
  • Configurable RocksDB logging (LOG files) with proper defaults (rotate, max size, verbosity, etc) to stop LOG files from accumulating so much
  • Federated presence support and configurable local presence (via upstream MR)
  • Concurrency support for key fetching for faster remote room joins and room joins that will error less frequently (via upstream MR)
  • Experimental room version 11 support (via upstream MR)
  • Enabled all non-officially-supported room versions as experimental so we can at least attempt to join them
  • Configurable guest registration including forbidding guest registrations if no admin user is created yet, respects allow registration setting, and an optional override setting with a default of no guest registrations allowed.
  • Explicit startup error/warning if your configuration allows open registration without a token or such like Synapse
  • Improved RocksDB defaults to use new features that help with performance significantly, uses settings tailored to SSDs, and a conduwuit setting to tell RocksDB to use settings that are tailored to HDDs or slow spinning rust storage.
  • Updated Ruma to latest commit where possible, and add some unstable MSCs (some still require an implementation though)
  • conduwuit allows MXIDs with + in them (thanks to Ruma update)
  • Revamped admin room infrastructure and commands (via upstream MR)
  • Make spaces/hierarchy cache use cache_capacity_modifier instead of hardcoded small value
  • Make PDU appending, building, etc asynchronous
  • Add optional feature flag to use SHA256 key names for media instead of base64 to overcome filesystem file name length limitations (OS error file name too long) (via upstream MR)
  • Add optional feature flag to enable zstd HTTP body compression
  • Add support for querying both Matrix SRV records, the deprecated _matrix record and _matrix-fed record if necessary
  • Add config option for device name federation with a privacy-friendly default (disabled)
  • Add config option for requiring authentication to the /publicRooms endpoint (room directory) with a default enabled for privacy
  • Add config option for federating /publicRooms endpoint (room directory) to other servers with a default disabled for privacy
  • Add support for listening on a UNIX socket for performance and host security with proper default permissions (660)
  • Add missing destination key to all X-Matrix Authorization requests (spec compliance issue)
  • Fix spec compliance issue with servers being able to fetch remote user profiles over federation for users who don't belong to our server (/_matrix/federation/v1/query/profile)
  • Use aggressive build-time performance optimisations for release builds (1 codegen unit, no debug, fat LTO, etc, and optimise all crates with same)
  • Raise various hardcoded timeouts in codebase that were way too short, making some things like room joins and client bugs error less or none at all than they should
  • Add debug admin command to force update user device lists (could potentially resolve some E2EE flukes) (ForceDeviceListUpdates)
  • Declare various missing Matrix versions and features at /_matrix/client/versions
  • Add support for serving server and client well-known files from conduwuit using well_known_client and well_known_server options
  • Add non-standard sliding sync proxy health check (?) endpoint at /client/server.json that some clients such as Element Web query using the well_known_client or well_known_server config options
  • Send a User-Agent on all of our requests (conduwuit/0.7.0-alpha+conduwuit-0.1.1) which strangely was not done upstream since forever. Some providers consider no User-Agent suspicious and block said requests.
  • Safer and cleaner shutdowns on both database side as we run cleanup on shutdown and exits database loop better (no potential hanging issues in database loop), overall cleaner shutdown logic
  • Basic binary commands like conduwuit --version work (interested in expanding it more)
  • Allow HEAD HTTP requests in CORS for clients (despite not being explicity mentioned in Matrix spec, HTTP spec says all HEAD requests need to behave the same as GET requests, Synapse supports HEAD requests)
  • Bump MSRV to 1.75.0 for Cargo.toml workspace lints and latest ruma using 1.75.0
  • Purge unmaintained/irrelevant/broken database backends (heed, sled, persy)
  • webp support for images
  • Support for suggesting servers to join at /_matrix/client/v3/directory/room/{roomAlias}
  • Prevent admin credential commands like reset password and deactivate user from modifying non-local users (https://gitlab.com/famedly/conduit/-/issues/377)
  • Fixed spec compliance issue with room version 8 - 11 joins (https://github.com/matrix-org/synapse/issues/16717 / https://github.com/matrix-org/matrix-spec/issues/1708)
  • Add basic cache eviction for true destinations when requests fail if we use a cached destination (e.g. a server has modified their well-known and we're still connecting to the old destination)
  • Only follow 6 redirects total in our default reqwest ClientBuilder
  • Generate passwords with 25 characters instead of 15
  • Add missing reason field to user ban events (/ban)
  • For all /report requests: check if the reported event ID belongs to the reported room ID, raise report reasoning character limit to 750, fix broken formatting, make a small delayed random response per spec suggestion on privacy, and check if the sender user is in the reported room.
  • Support blocking servers from downloading remote media from
  • Support sending well_known response to client logins if using config option well_known_client
  • Send avatar_url on invite room membership events/changes
  • Revamp example config, adding a lot of config options available (still some missing)
  • Return joined member count of rooms for push rules/conditions instead of a hardcoded value of 10
  • Respect most client parameters for /media/ requests (allow_redirect still needs work)
  • Config option ip_range_denylist to support refusing to send requests (typically federation) to specific IP ranges, typically RFC 1918, non-routable, testnet, etc addresses like Synapse for security.
  • Support for creating rooms with custom room IDs like Maunium Synapse (room_id request body field to /createRoom)
  • Assume well-knowns are broken if they exceed past 10000 characters.
  • Basic validation/checks on user-specified room aliases and custom room ID creations