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@neilalexander neilalexander released this 28 Oct 14:55
· 92 commits to develop since this release
v0.5.0
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neilalexander Neil
GPG key ID: A02A2019A2BB0944
Learn about vigilant mode.

NOTE: If you are using the Debian package and upgrading an existing installation, you may need to update your AdminListen line in your configuration file to unix:///var/run/yggdrasil/yggdrasil.sock or delete the AdminListen line altogether.

Added

  • Authenticated peering handshake with optional password, i.e.
    • For listeners: tls://[::]:12345?password=123456abcdef
    • For peers: tls://a.b.c.d:12345?password=123456abcdef
    • For multicast interfaces with the new Password option in each MulticastInterfaces section
    • Maximum password length is 64 characters
  • QUIC support for peerings, by using the new quic:// scheme in Listen and Peers
    • This has not been extensively tested and may perform worse than TCP or TLS peers
  • The private key can now be stored in PEM format separately to the main configuration file with the new PrivateKeyPath configuration file option
    • Use the -exportkey flag to export the key to a file from an existing config

Changed

  • New routing scheme, which is backwards incompatible with previous versions of Yggdrasil
    • The wire protocol version number, exchanged as part of the peer setup handshake, has been increased to 0.5
    • Nodes running this new version will not be able to peer with earlier versions of Yggdrasil
    • A DHT is no longer used to map public keys and routes through treespace
    • Bloom filters are used to track on-tree links and nodes reachable via that link
    • Nodes now gossip separate per-link information which is tracked in CRDT structures, forcing local consistency and preventing unnecessary flapping when a route to the root node has changed or is broken
    • Greedy routing is once again used instead of source routing
    • Per-link keepalives have been replaced with periodic acknowledgements, reducing idle bandwidth
  • The link handshake and multicast beacon formats have been revised for better future extensibility
  • The link code has been refactored for more robust tracking of peering states
    • As a result, the admin socket is now able to report information about configured peerings that are down
    • Reconnect intervals are now tracked separately for each configured peer with exponential backoffs

Removed

  • Yggdrasil will no longer request BBR congestion control for TCP and TLS peerings on Linux
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