Using asio::ip::address_v6::any() for empty listen interface.

Author: dchapyshev

source/relay/sessions_worker.cc

@@ -78,14 +78,23 @@ void SessionsWorker::onBeforeThreadRunning()
     self_task_runner_ = thread_->taskRunner();
     DCHECK(self_task_runner_);
 
-    std::error_code error_code;
-    asio::ip::address listen_address =
-        asio::ip::make_address(base::local8BitFromUtf16(listen_interface_), error_code);
-    if (error_code)
+    asio::ip::address listen_address;
+
+    if (!listen_interface_.empty())
     {
-        LOG(LS_ERROR) << "Unable to get listen address: "
-                      << base::utf16FromLocal8Bit(error_code.message());
-        return;
+        std::error_code error_code;
+        listen_address = asio::ip::make_address(
+            base::local8BitFromUtf16(listen_interface_), error_code);
+        if (error_code)
+        {
+            LOG(LS_ERROR) << "Unable to get listen address: "
+                          << base::utf16FromLocal8Bit(error_code.message());
+            return;
+        }
+    }
+    else
+    {
+        listen_address = asio::ip::address_v6::any();
     }
 
     session_manager_ = std::make_unique<SessionManager>(