Sctp failover question

Question

I happened to be perusing the SCTP code in Linux' tree and noticed that the following is happening in net/sctp/associola.c,

sctp_assoc_control_transport():

/* Don't inform ULP about transition from PF to
 * active state and set cwnd to 1, see SCTP
 * Quick failover draft section 5.1, point 5
 */
if (transport->state == SCTP_PF) {
 ulp_notify = false;
 transport->cwnd = 1;
}

From the quick failover draft, I see that the cwnd should be 1*MTU. This doesn't seem correct as other places set the cwnd as:

transport->cwnd = asoc->pathmtu;

Am I missing something or is this just a simplification?

Answer 1

I think you are correct, that doesn't seem right.