bool_t linphone_core_keep_alive_enabled(LinphoneCore* lc);
void *linphone_core_get_user_data(LinphoneCore *lc);
+void linphone_core_set_user_data(LinphoneCore *lc, void *userdata);
/* returns LpConfig object to read/write to the config file: usefull if you wish to extend
the config file with your own sections */