- unsigned long timeout;
- timeout = t->rto + sctp_jitter(t->rto);
- if ((t->state != SCTP_UNCONFIRMED) &&
- (t->state != SCTP_PF))
- timeout += t->hbinterval;
- timeout += jiffies;
- return timeout;
+ /* RTO + timer slack +/- 50% of RTO */
+ unsigned long timeout = (trans->rto >> 1) + prandom_u32_max(trans->rto);
+
+ if (trans->state != SCTP_UNCONFIRMED &&
+ trans->state != SCTP_PF)
+ timeout += trans->hbinterval;
+
+ return timeout + jiffies;