getRange() and getFirstTun() refactor start

include/llarp/service/context.hpp

@@ -4,6 +4,7 @@
 #include <llarp/service/config.hpp>
 #include <llarp/service/endpoint.hpp>
 #include <unordered_map>
+#include <llarp/handlers/tun.hpp>
 
 namespace llarp
 {
@@ -18,6 +19,14 @@ namespace llarp
       void
       Tick();
 
+      /// DRY refactor
+      llarp::handlers::TunEndpoint *
+      getFirstTun();
+
+      /// punch a hole to get ip range from first tun endpoint
+      llarp_tun_io *
+      getRange();
+
       /// punch a hole open for DNS to add mappings
       bool
       MapAddress(const llarp::service::Address &addr, uint32_t ip);

llarp/service/context.cpp

@@ -29,7 +29,34 @@ namespace llarp
         ++itr;
       }
     }
-    
+
+    llarp::handlers::TunEndpoint *
+    Context::getFirstTun()
+    {
+      if (!m_Endpoints.size())
+      {
+        llarp::LogError("No endpoints found");
+        return nullptr;
+      }
+      auto firstEndpoint = m_Endpoints.begin();
+      auto *uniqueEndpoint = &firstEndpoint->second;
+      llarp::service::Endpoint *endpointer = uniqueEndpoint->get();
+      llarp::handlers::TunEndpoint *tunEndpoint = dynamic_cast<llarp::handlers::TunEndpoint *>(endpointer);
+      return tunEndpoint;
+    }
+
+    llarp_tun_io *
+    Context::getRange()
+    {
+      llarp::handlers::TunEndpoint *tunEndpoint = this->getFirstTun();
+      if (!tunEndpoint)
+      {
+        llarp::LogError("No tunnel endpoint found");
+        return nullptr;
+      }
+      return &tunEndpoint->tunif;
+    }
+
     bool
     Context::MapAddress(const llarp::service::Address &addr, uint32_t ip)
     {