outpost/ldap: delay user information removal upon closing of connection

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

internal/outpost/ldap/close.go

@@ -0,0 +1,32 @@
+package ldap
+
+import (
+	"net"
+	"time"
+)
+
+func (ls *LDAPServer) Close(boundDN string, conn net.Conn) error {
+	for _, p := range ls.providers {
+		p.delayDeleteUserInfo(boundDN)
+	}
+	return nil
+}
+
+func (pi *ProviderInstance) delayDeleteUserInfo(dn string) {
+	ticker := time.NewTicker(30 * time.Second)
+	quit := make(chan struct{})
+	go func() {
+		for {
+			select {
+			case <-ticker.C:
+				pi.boundUsersMutex.Lock()
+				delete(pi.boundUsers, dn)
+				pi.boundUsersMutex.Unlock()
+				close(quit)
+			case <-quit:
+				ticker.Stop()
+				return
+			}
+		}
+	}()
+}