improve mycelium argument

Listings/nebula_conntrack.go

@@ -0,0 +1,39 @@
+type FirewallConntrack struct {
+    sync.Mutex
+
+    Conns      map[firewall.Packet]*conn
+    TimerWheel *TimerWheel[firewall.Packet]
+}
+
+func (f *Firewall) inConns(
+    fp firewall.Packet, h *HostInfo,
+    caPool *cert.CAPool,
+    localCache firewall.ConntrackCache,
+) bool {
+    if localCache != nil {
+        if _, ok := localCache[fp]; ok {
+            return true
+        }
+    }
+    conntrack := f.Conntrack
+    conntrack.Lock()
+
+    // Purge every time we test
+    ep, has := conntrack.TimerWheel.Purge()
+    if has {
+        f.evict(ep)
+    }
+
+    c, ok := conntrack.Conns[fp]
+    if !ok {
+        conntrack.Unlock()
+        return false
+    }
+    // ... update expiry ...
+    conntrack.Unlock()
+
+    if localCache != nil {
+        localCache[fp] = struct{}{}
+    }
+    return true
+}