make publishing introsets optional using reachable=false to disable

llarp/handlers/tun.cpp

@@ -111,6 +111,14 @@ namespace llarp
     bool
     TunEndpoint::SetOption(const std::string &k, const std::string &v)
     {
+      if(k == "reachable")
+      {
+        if(IsFalseValue(v))
+        {
+          m_PublishIntroSet = false;
+          LogInfo(Name(), " setting to be not reachable by default");
+        }
+      }
       if(k == "isolate-network" && IsTrueValue(v.c_str()))
       {
 #if defined(__linux__)

llarp/service/endpoint.cpp

@@ -544,6 +544,8 @@ namespace llarp
     bool
     Endpoint::ShouldPublishDescriptors(llarp_time_t now) const
     {
+      if(not m_PublishIntroSet)
+        return false;
       // make sure we have all paths that are established
       // in our introset
       size_t numNotInIntroset = 0;

llarp/service/endpoint.hpp

@@ -438,6 +438,7 @@ namespace llarp
       hooks::Backend_ptr m_OnUp;
       hooks::Backend_ptr m_OnDown;
       hooks::Backend_ptr m_OnReady;
+      bool m_PublishIntroSet = true;
 
      private:
       void