diff --git a/src/main.cpp b/src/main.cpp
index a5b0d6d..14429b6 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -183,6 +183,31 @@ namespace {
 		} while (not r);
 		return retval;
 	}
+
+	void add_port_mapping (
+		const UPNPUrlsResource& parResource,
+		uint16_t parExtPort,
+		uint16_t parIntPort,
+		const std::string& parAddr,
+		const std::string& parDesc,
+		uint32_t parDuration,
+		Protocol parProtocol
+	) {
+		const auto r = UPNP_AddPortMapping(
+			parResource.urls()->controlURL,
+			parResource.data()->first.servicetype,
+			std::to_string(parExtPort).c_str(),
+			std::to_string(parIntPort).c_str(),
+			parAddr.c_str(),
+			parDesc.c_str(),
+			parProtocol._to_string(),
+			0,
+			std::to_string(parDuration).c_str()
+		);
+		//if (UPNPCOMMAND_SUCCESS != r)
+			//printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n",
+			//eport, iport, iaddr, r, strupnperror(r));
+	}
 } //unnamed namespace
 
 int main() {