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-rw-r--r--net/sctp/transport.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index a596f5308cb..4d8c2ab864f 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -526,3 +526,35 @@ unsigned long sctp_transport_timeout(struct sctp_transport *t)
timeout += jiffies;
return timeout;
}
+
+/* Reset transport variables to their initial values */
+void sctp_transport_reset(struct sctp_transport *t)
+{
+ struct sctp_association *asoc = t->asoc;
+
+ /* RFC 2960 (bis), Section 5.2.4
+ * All the congestion control parameters (e.g., cwnd, ssthresh)
+ * related to this peer MUST be reset to their initial values
+ * (see Section 6.2.1)
+ */
+ t->cwnd = min(4*asoc->pathmtu, max_t(__u32, 2*asoc->pathmtu, 4380));
+ t->ssthresh = asoc->peer.i.a_rwnd;
+ t->rto = asoc->rto_initial;
+ t->rtt = 0;
+ t->srtt = 0;
+ t->rttvar = 0;
+
+ /* Reset these additional varibles so that we have a clean
+ * slate.
+ */
+ t->partial_bytes_acked = 0;
+ t->flight_size = 0;
+ t->error_count = 0;
+ t->rto_pending = 0;
+
+ /* Initialize the state information for SFR-CACC */
+ t->cacc.changeover_active = 0;
+ t->cacc.cycling_changeover = 0;
+ t->cacc.next_tsn_at_change = 0;
+ t->cacc.cacc_saw_newack = 0;
+}