- Modified tailNode/tailNodes functions to accept exitRouteFilterFunc parameter
- Added canUseExitRoutes helper to check for broad internet access permission
- Added DestsContainsPrefixes method to matcher for checking prefix containment
- Exit routes now only included in peer AllowedIPs when requesting node has internet access
- Added comprehensive unit tests for both scenarios (with and without autogroup:internet)
Fixes#2788
Co-authored-by: kradalby <98431+kradalby@users.noreply.github.com>
Initial work on a nodestore which stores all of the nodes
and their relations in memory with relationship for peers
precalculated.
It is a copy-on-write structure, replacing the "snapshot"
when a change to the structure occurs. It is optimised for reads,
and while batches are not fast, they are grouped together
to do less of the expensive peer calculation if there are many
changes rapidly.
Writes will block until commited, while reads are never
blocked.
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
