wire up sigusr1 to reset libunbound dns resolver

daemon/main.cpp

@@ -279,6 +279,7 @@ run_main_context(std::optional<fs::path> confFile, const llarp::RuntimeOptions o
     signal(SIGTERM, handle_signal);
 #ifndef _WIN32
     signal(SIGHUP, handle_signal);
+    signal(SIGUSR1, handle_signal);
 #endif
 
     ctx->Setup(opts);

llarp/context.cpp

@@ -158,6 +158,10 @@ namespace llarp
     {
       Reload();
     }
+    if (sig == SIGUSR1 and router)
+    {
+      router->Thaw();
+    }
 #endif
   }
 

llarp/dns/server.cpp

@@ -86,6 +86,16 @@ namespace llarp
       return *itr;
     }
 
+    void
+    Proxy::Restart()
+    {
+      if (m_UnboundResolver)
+      {
+        LogInfo("reset libunbound's internal stuff");
+        m_UnboundResolver->Init();
+      }
+    }
+
     bool
     Proxy::SetupUnboundResolver(const std::vector<IpAddress>& resolvers)
     {

llarp/dns/server.hpp

@@ -43,6 +43,9 @@ namespace llarp
       void
       Stop();
 
+      void
+      Restart();
+
       using Buffer_t = std::vector<uint8_t>;
 
      private:

llarp/handlers/tun.cpp

@@ -76,6 +76,13 @@ namespace llarp
       return obj;
     }
 
+    void
+    TunEndpoint::Thaw()
+    {
+      if (m_Resolver)
+        m_Resolver->Restart();
+    }
+
     bool
     TunEndpoint::Configure(const NetworkConfig& conf, const DnsConfig& dnsConf)
     {

llarp/handlers/tun.hpp

@@ -31,6 +31,9 @@ namespace llarp
         return shared_from_this();
       }
 
+      void
+      Thaw() override;
+
       bool
       Configure(const NetworkConfig& conf, const DnsConfig& dnsConf) override;
 

llarp/router/abstractrouter.hpp

@@ -198,6 +198,10 @@ namespace llarp
     virtual void
     Stop() = 0;
 
+    /// thaw from long sleep or network changed event
+    virtual void
+    Thaw() = 0;
+
     /// non gracefully stop the router
     virtual void
     Die() = 0;

llarp/router/router.cpp

@@ -121,6 +121,18 @@ namespace llarp
     return inbound_link_msg_parser.ProcessFrom(session, buf);
   }
 
+  void
+  Router::Thaw()
+  {
+    LogInfo("We arise from a long sleep, probably need to reset the network state");
+    hiddenServiceContext().ForEachService([](const auto& name, const auto& ep) -> bool {
+      LogInfo(name, " thawing...");
+      ep->Thaw();
+      return true;
+    });
+    LogInfo("We are ready to go bruh");
+  }
+
   void
   Router::PersistSessionUntil(const RouterID& remote, llarp_time_t until)
   {

llarp/router/router.hpp

@@ -363,6 +363,9 @@ namespace llarp
     bool
     StartRpcServer() override;
 
+    void
+    Thaw() override;
+
     bool
     Run() override;
 

llarp/service/endpoint.hpp

@@ -127,6 +127,9 @@ namespace llarp
         return {0};
       }
 
+      virtual void
+      Thaw(){};
+
       void
       ResetInternalState() override;