With the lazy connection feature, the peer will connect to target peers on-demand. The trigger can be any IP traffic.
This feature can be enabled with the NB_ENABLE_EXPERIMENTAL_LAZY_CONN environment variable.
When the engine receives a network map, it binds a free UDP port for every remote peer, and the system configures WireGuard endpoints for these ports. When traffic appears on a UDP socket, the system removes this listener and starts the peer connection procedure immediately.
Key changes
Fix slow netbird status -d command
Move from engine.go file to conn_mgr.go the peer connection related code
Refactor the iface interface usage and moved interface file next to the engine code
Add new command line flag and UI option to enable feature
The peer.Conn struct is reusable after it has been closed.
Change connection states
Connection states
Idle: The peer is not attempting to establish a connection. This typically means it's in a lazy state or the remote peer is expired.
Connecting: The peer is actively trying to establish a connection. This occurs when the peer has entered an active state and is continuously attempting to reach the remote peer.
Connected: A successful peer-to-peer connection has been established and communication is active.
If we get domain routes the Network prefix variable in route structure will be invalid (engine.go:1057). When we handower to Android the routes, we must to filter out the domain routes. If we do not do it the Android code will get "invalid prefix" string as a route.
Fixes panic occurring when body is nil (this usually happens when connections is refused) due to lack of nil check by centralizing response.Body.Close() behavior.
* fix: set TLS ServerName for hostname-based QUIC connections
When connecting to a relay server by hostname, certificates are
validated against the IP address instead of the hostname.
This change sets ServerName in the TLS config when connecting
via hostname, ensuring proper certificate validation.
* use default port if port is missing in URL string
Add an upload bundle option with the flag --upload-bundle; by default, the upload will use a NetBird address, which can be replaced using the flag --upload-bundle-url.
The upload server is available under the /upload-server path. The release change will push a docker image to netbirdio/upload image repository.
The server supports using s3 with pre-signed URL for direct upload and local file for storing bundles.
Zoltan Papp