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  • Telodendria-0_3_0 2b3d0aaeaf

    Telodendria v0.3.0 Pre-Release

    jordan released this 2023-06-10 09:29:56 -04:00 | 112 commits to master since this release

    Introducing a new configuration API and Cytoplasm, a general-purpose C library that
    supports source/sink-agnostic I/O, TLS, an HTTP client, and more! The third major
    release of Telodendria packs a lot of architectural improvements on top of supporting
    more of the Matrix specification.

    Matrix Specification

    Added support for the following endpoints:

    • /_matrix/client/v3/account/whoami
    • /_matrix/client/v3/account/password
    • /_matrix/client/v3/account/deactivate
    • /_matrix/client/v3/profile/*
    • /_matrix/client/v3/capabilities
    • /_matrix/client/v3/auth/*/fallback/web

    There is also support for token-based user registration. Note that there is as of
    yet no admin-facing way to create these registration tokens, but the APIs are in
    place.

    New Features

    • Added a new HttpClient API for making HTTP requests. This will eventually be
      used for federating with other Matrix homeservers.
    • Added support for pretty-printing JSON in Json. Telodendria itself does not
      pretty-print JSON, but this is useful for debugging and building useful tools.
    • Added a handful of new development tools built on the Telodendria APIs. New
      tools include http, a command line tool for making HTTP requests, similar to
      curl, json, a command line tool for working with JSON, similar to jq, and
      http-debug-server, a simple HTTP server that just prints requests out to standard
      output and returns an empty JSON object. http and json are replacements for
      curl and jq that build on the HttpClient and Json APIs. They exist mainly
      to test those APIs, but also to reduce the number of dependencies that Telodendria
      has. http-debug-server exists to test the HttpServer and HttpClient APIs.
    • Replaced all usage of jq with the new json tool. jq is no longer a development
      dependency.
    • Replaced all usage of curl with the new http tool. curl is no longer a
      required development dependency.
    • Added a new tt script for easily making Matrix requests against Telodendria
      in development.
    • Added TLS support to both the HTTP client and server. Currently, Telodendria
      supports LibreSSL and OpenSSL, but other TLS libraries should be extremely easy
      to add support for.
    • Added support for spinning up multiple HTTP servers. This is useful for having
      a TLS port and a non-TLS port, for example.
    • Moved all program configuration to the data directory and added an administrator
      API endpoint to manage it. It is now no longer recommended to manually update the
      configuration file. Consult the Administrator API documentation
      and the Configuration documentation.
    • Added an administrator API endpoint for process control. Telodendria can now be
      restarted or shutdown via API endpoint.
    • Added an administrator API endpoint for getting statistics about the running
      Telodendria process.
    • Added support for user privileges, a way to have fine-grained control over what
      users are allowed to do with the administrator API. Administrator APIs for setting
      and getting privileges is now supported, and registration tokens have privileges
      associated with them so that users created with a token will automatically be given
      the specified privileges.

    Fixes & General Improvements

    • Fixed a few warnings that were generated on some obscure compilers.
    • Moved the main() function to its own file to make it easier to link other
      programs with the Telodendria APIs.
    • Fixed the development tools environment script. Apparently using a hyphen as a bullet
      point is not very portable, because some shell implementations of printf interpret it
      as a flag. Switched to an asterisk.
    • Fixed some intermittent I/O errors that would occur as a result of race conditions in
      JsonConsomeWhitespace(). This function, and a few others, expect I/O to be blocking,
      but the HttpServer sets up I/O to be non-blocking, leading to occasional failures in
      JSON parsing.
    • Abstracted all I/O into the new Io and Stream APIs, which provide an input- and
      output- agnostic stream processing interface. This allows for a simple implementation of
      proxies, TLS, and other stream filters without having to change any of the existing
      code.
    • Remove all non-POSIX function calls, including the call to chroot() and, on
      OpenBSD, pledge() and unveil(). This may seem like a downgrade in security, but
      these are platform-specific system calls that should be patched in by package maintainers
      if they are desired. They also caused problems when implementing other features, because
      some library calls need to be able to access files on the filesystem.
    • Fixed the build script to supply LDFLAGS after the object files when linking.
      Apparently the order in which libraries are passed matters to some compilers.
    • Added the response status of a request to the log output. This means that requests are
      logged after they have completed, not before they are started.
    • Memory allocations, reallocations, and frees are no longer loged when the log level
      is set to debug in the configuration file. To enable the logging of memory operations,
      pass the -v flag.
    • Implemented a proper HTTP request router with POSIX regular expression support.
      Previously, a series of nested if-statements were used to route requests, but this
      approach quickly becamse very messy. While the HTTP request router incurs a small memory
      and runtime speed penalty, the code is now much more maintainable and easier to follow.
    • Fixed some memory bugs in Db that were related to caching data. Caching should
      now work as expected.
    • Fixed a major design flaw in Db that would cause deadlock when multiple threads
      request access to the same object. Database locking is now in a per-thread basis,
      instead of a per-reference basis.
    • Telodendria now shuts down cleanly in response to SIGTERM.
    • Did some general refactoring to make the source code more readable and easier
      to maintain.
      Fixed a number of memory-related issues, including switching out some unsafe
      functions for safer versions, per the recommendations of the OpenBSD linker.
    • Moved all code documentation into the C header files to make it more likely
      that it will get updated. A simple header file parser and documentation generator
      have been added to the code base. See the hdoc man pages for documentation.
    • Updated the build script to provide static and shared libraries containing
      the code for Telodendria to make it easier to statically and dynamically link to
      other programs. The idea is that these libraries should be shipped with Telodendria,
      or as a separate package, and can be used to provide a high-level programming
      environment.
    • Updated the Json API to calculate the length of a JSON object. This is
      used to set the Content-Length header in HTTP requests and reponses.
    • Added some string functions, including StrEquals(), which replaced almost all
      uses of strcmp(), since strcmp() is used almost exclusively for equality
      checking. StrEquals() provides a standard way to do so, because previously,
      multiple different conventions could be found throughout the code base (for example:
      !strcmp(str1, str2) vs strcmp(str1, str2) == 0).

    ... And many more!

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