CTRL_ATTR_FAMILY_NAME
nlattr_add_string(nw, CTRL_ATTR_FAMILY_NAME, gf->family_name);
{ .type = CTRL_ATTR_FAMILY_NAME , .off = _OUT(family_name), .cb = nlattr_get_string },
.type = CTRL_ATTR_FAMILY_NAME,
snl_add_msg_attr_string(&nw, CTRL_ATTR_FAMILY_NAME, family_name);
snl_add_msg_attr_string(&nw, CTRL_ATTR_FAMILY_NAME, "nlctrl");
.type = CTRL_ATTR_FAMILY_NAME,
snl_add_msg_attr_string(&nw, CTRL_ATTR_FAMILY_NAME, argv[0]);