personal_interest_mirrors/nebula
1
0
Fork 0
mirror of https://github.com/slackhq/nebula.git synced 2026-08-15 08:27:01 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fold the rebind counter and traffic flags into one atomic word

Browse Source
This commit is contained in:
Nate Brown
2026-07-23 15:24:22 -05:00
parent bce0b4249e
commit 30e2735af3
6 changed files with 117 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files
inside.go
+4 -9
View File
@@ -365,17 +365,12 @@ func (f *Interface) sendNoMetrics(t header.MessageType, st header.MessageSubType
//l.WithField("trace", string(debug.Stack())).Error("out Header ", &Header{Version, t, st, 0, hostinfo.remoteIndexId, c}, p)
out = header.Encode(out, header.Version, t, st, hostinfo.remoteIndexId, c)
f.connectionManager.Out(hostinfo)
// Query our LH if we haven't since the last time we've been rebound, this will cause the remote to punch against
// all our addrs and enable a faster roaming.
if t != header.CloseTunnel && hostinfo.lastRebindCount != f.rebindCount {
//NOTE: there is an update hole if a tunnel isn't used and exactly 256 rebinds occur before the tunnel is
// finally used again. This tunnel would eventually be torn down and recreated if this action didn't help.
// We rebound since this tunnel last sent, so the local network moved. Ask the lighthouse to have the far side
// punch at where we are now, which primes their conntrack the same way a handshake would.
if f.connectionManager.Out(hostinfo) && t != header.CloseTunnel {
f.lightHouse.QueryServer(hostinfo.vpnAddrs[0])
hostinfo.lastRebindCount = f.rebindCount
if f.l.Enabled(context.Background(), slog.LevelDebug) {
f.l.Debug("Lighthouse update triggered for punch due to rebind counter",
f.l.Debug("Lighthouse update triggered for punch due to rebind epoch",
"vpnAddrs", hostinfo.vpnAddrs,
)
}