From b148ba055245cec5007ee91dd3ffbfeb58d49c5a Mon Sep 17 00:00:00 2001
From: Henning Surmeier <me@hensur.de>
Date: Sun, 9 Jan 2022 20:35:15 +0100
Subject: [PATCH 1/2] skip route table if there is no auto rule

---
 src/ndppd.cc | 3 ++-
 src/rule.cc  | 8 ++++++++
 src/rule.h   | 4 ++++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/ndppd.cc b/src/ndppd.cc
index bec9656..b303721 100644
--- a/src/ndppd.cc
+++ b/src/ndppd.cc
@@ -304,7 +304,8 @@ int main(int argc, char* argv[], char* env[])
         t1.tv_sec  = t2.tv_sec;
         t1.tv_usec = t2.tv_usec;
 
-        route::update(elapsed_time);
+        if (rule::any_auto())
+            route::update(elapsed_time);
         session::update_all(elapsed_time);
     }
 
diff --git a/src/rule.cc b/src/rule.cc
index 9e72480..a1e8376 100644
--- a/src/rule.cc
+++ b/src/rule.cc
@@ -24,6 +24,8 @@
 
 NDPPD_NS_BEGIN
 
+bool rule::_any_aut = false;
+
 rule::rule()
 {
 }
@@ -49,6 +51,7 @@ ptr<rule> rule::create(const ptr<proxy>& pr, const address& addr, bool aut)
     ru->_pr    = pr;
     ru->_addr  = addr;
     ru->_aut   = aut;
+    _any_aut = _any_aut || aut;
 
     logger::debug()
         << "rule::create() if=" << pr->ifa()->name().c_str() << ", addr=" << addr
@@ -57,6 +60,11 @@ ptr<rule> rule::create(const ptr<proxy>& pr, const address& addr, bool aut)
     return ru;
 }
 
+bool rule::any_auto()
+{
+    return _any_aut;
+}
+
 const address& rule::addr() const
 {
     return _addr;
diff --git a/src/rule.h b/src/rule.h
index 6663066..ca2aa36 100644
--- a/src/rule.h
+++ b/src/rule.h
@@ -42,6 +42,8 @@ public:
 
     bool check(const address& addr) const;
 
+    static bool any_auto();
+
 private:
     weak_ptr<rule> _ptr;
 
@@ -53,6 +55,8 @@ private:
 
     bool _aut;
 
+    static bool _any_aut;
+
     rule();
 };
 
-- 
2.34.1