L2TP_ATTR_COOKIE
if (info->attrs[L2TP_ATTR_COOKIE]) {
u16 len = nla_len(info->attrs[L2TP_ATTR_COOKIE]);
memcpy(&cfg.cookie[0], nla_data(info->attrs[L2TP_ATTR_COOKIE]), len);
nla_put(skb, L2TP_ATTR_COOKIE, session->cookie_len, session->cookie)) ||
[L2TP_ATTR_COOKIE] = {