fix crashes on shutdown (#1433)

llarp/dns/server.cpp

@@ -31,7 +31,10 @@ namespace llarp
 
     void
     Proxy::Stop()
-    {}
+    {
+      if (m_UnboundResolver)
+        m_UnboundResolver->Stop();
+    }
 
     bool
     Proxy::Start(const IpAddress& addr, const std::vector<IpAddress>& resolvers)

llarp/dns/unbound_resolver.cpp

@@ -12,6 +12,12 @@ namespace llarp::dns
     SockAddr source;
   };
 
+  void
+  UnboundResolver::Stop()
+  {
+    Reset();
+  }
+
   void
   UnboundResolver::Reset()
   {

llarp/dns/unbound_resolver.hpp

@@ -41,6 +41,10 @@ namespace llarp::dns
     static void
     Callback(void* data, int err, ub_result* result);
 
+    // stop resolver thread
+    void
+    Stop();
+
     // upstream resolver IP can be IPv4 or IPv6
     bool
     Init();

llarp/handlers/tun.cpp

@@ -893,6 +893,8 @@ namespace llarp
     bool
     TunEndpoint::Stop()
     {
+      if (m_Resolver)
+        m_Resolver->Stop();
       return llarp::service::Endpoint::Stop();
     }
 

llarp/router/route_poker.cpp

@@ -90,7 +90,8 @@ namespace llarp
 
   RoutePoker::~RoutePoker()
   {
-    DeleteAllRoutes();
+    for (const auto& [ip, gateway] : m_PokedRoutes)
+      net::DelRoute(ip.ToString(), gateway.ToString());
   }
 
   std::optional<huint32_t>