dnsdist: Check that the number of sockets is > 0

diff --git a/pdns/dnsdist-lua.cc b/pdns/dnsdist-lua.cc
index a73b6d1b1090b43700cec17e008ab4e2f1b9ca8b..55ee582a1b39df42170e736da7c8d4a33581e246 100644 (file)
--- a/pdns/dnsdist-lua.cc
+++ b/pdns/dnsdist-lua.cc
@@ -217,9 +217,13 @@ void setupLuaConfig(bool client)
                          }
                        }
 
-                       if(vars.count("sockets")) {
-                         numberOfSockets=std::stoi(boost::get<string>(vars["sockets"]));
-                       }
+                        if (vars.count("sockets")) {
+                          numberOfSockets = std::stoul(boost::get<string>(vars["sockets"]));
+                          if (numberOfSockets == 0) {
+                            warnlog("Dismissing invalid number of sockets '%s', using 1 instead", boost::get<string>(vars["sockets"]));
+                            numberOfSockets = 1;
+                          }
+                        }
 
                        std::shared_ptr<DownstreamState> ret;
                        try {