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[client] refactor lazy detection (#4050)

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This PR introduces a new inactivity package responsible for monitoring peer activity and notifying when peers become inactive.
Introduces a new Signal message type to close the peer connection after the idle timeout is reached.
Periodically checks the last activity of registered peers via a Bind interface.
Notifies via a channel when peers exceed a configurable inactivity threshold.
Default settings
DefaultInactivityThreshold is set to 15 minutes, with a minimum allowed threshold of 1 minute.

Limitations
This inactivity check does not support kernel WireGuard integration. In kernel–user space communication, the user space side will always be responsible for closing the connection.
This commit is contained in:
Zoltan Papp
2025-07-04 19:52:27 +02:00
committed by GitHub
parent 77ec32dd6f
commit fbb1b55beb
33 changed files with 857 additions and 543 deletions
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32
client/internal/engine.go
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@ -38,7 +38,6 @@ import (
nftypes "github.com/netbirdio/netbird/client/internal/netflow/types"
"github.com/netbirdio/netbird/client/internal/networkmonitor"
"github.com/netbirdio/netbird/client/internal/peer"
"github.com/netbirdio/netbird/client/internal/peer/dispatcher"
"github.com/netbirdio/netbird/client/internal/peer/guard"
icemaker "github.com/netbirdio/netbird/client/internal/peer/ice"
"github.com/netbirdio/netbird/client/internal/peerstore"
@ -175,8 +174,7 @@ type Engine struct {
sshServerFunc func(hostKeyPEM []byte, addr string) (nbssh.Server, error)
sshServer nbssh.Server
statusRecorder *peer.Status
peerConnDispatcher *dispatcher.ConnectionDispatcher
statusRecorder *peer.Status
firewall firewallManager.Manager
routeManager routemanager.Manager
@ -458,9 +456,7 @@ func (e *Engine) Start() error {
NATExternalIPs: e.parseNATExternalIPMappings(),
}
e.peerConnDispatcher = dispatcher.NewConnectionDispatcher()
e.connMgr = NewConnMgr(e.config, e.statusRecorder, e.peerStore, wgIface, e.peerConnDispatcher)
e.connMgr = NewConnMgr(e.config, e.statusRecorder, e.peerStore, wgIface)
e.connMgr.Start(e.ctx)
e.srWatcher = guard.NewSRWatcher(e.signal, e.relayManager, e.mobileDep.IFaceDiscover, iceCfg)
@ -1261,7 +1257,7 @@ func (e *Engine) addNewPeer(peerConfig *mgmProto.RemotePeerConfig) error {
}
if exists := e.connMgr.AddPeerConn(e.ctx, peerKey, conn); exists {
conn.Close()
conn.Close(false)
return fmt.Errorf("peer already exists: %s", peerKey)
}
@ -1308,13 +1304,12 @@ func (e *Engine) createPeerConn(pubKey string, allowedIPs []netip.Prefix, agentV
}
serviceDependencies := peer.ServiceDependencies{
StatusRecorder: e.statusRecorder,
Signaler: e.signaler,
IFaceDiscover: e.mobileDep.IFaceDiscover,
RelayManager: e.relayManager,
SrWatcher: e.srWatcher,
Semaphore: e.connSemaphore,
PeerConnDispatcher: e.peerConnDispatcher,
StatusRecorder: e.statusRecorder,
Signaler: e.signaler,
IFaceDiscover: e.mobileDep.IFaceDiscover,
RelayManager: e.relayManager,
SrWatcher: e.srWatcher,
Semaphore: e.connSemaphore,
}
peerConn, err := peer.NewConn(config, serviceDependencies)
if err != nil {
@ -1337,11 +1332,16 @@ func (e *Engine) receiveSignalEvents() {
e.syncMsgMux.Lock()
defer e.syncMsgMux.Unlock()
conn, ok := e.connMgr.OnSignalMsg(e.ctx, msg.Key)
conn, ok := e.peerStore.PeerConn(msg.Key)
if !ok {
return fmt.Errorf("wrongly addressed message %s", msg.Key)
}
msgType := msg.GetBody().GetType()
if msgType != sProto.Body_GO_IDLE {
e.connMgr.ActivatePeer(e.ctx, conn)
}
switch msg.GetBody().Type {
case sProto.Body_OFFER:
remoteCred, err := signal.UnMarshalCredential(msg)
@ -1398,6 +1398,8 @@ func (e *Engine) receiveSignalEvents() {
go conn.OnRemoteCandidate(candidate, e.routeManager.GetClientRoutes())
case sProto.Body_MODE:
case sProto.Body_GO_IDLE:
e.connMgr.DeactivatePeer(conn)
}
return nil