L2TP_ATTR_SESSION_ID
if (!info->attrs[L2TP_ATTR_SESSION_ID]) {
session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
} else if ((info->attrs[L2TP_ATTR_SESSION_ID]) &&
session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]);
nla_put_u32(skb, L2TP_ATTR_SESSION_ID, session->session_id) ||
[L2TP_ATTR_SESSION_ID] = { .type = NLA_U32, },