IFLA_GENEVE_TTL
{ .type = IFLA_GENEVE_TTL, .off = _OUT(ifla_ttl), .cb = snl_attr_get_uint8 },
snl_add_msg_attr_u8(&nw, IFLA_GENEVE_TTL, val);
if (error == 0 && nl_has_attr(&bm, IFLA_GENEVE_TTL))
nlattr_add_u8(nw, IFLA_GENEVE_TTL, sc->gnv_ttl);
{ .type = IFLA_GENEVE_TTL, .off = _OUT(ifla_ttl), .cb = nlattr_get_uint8 },