[SCTP]: Update SCTP_PEER_ADDR_PARAMS socket option to the latest api draft.
This patch adds support to set/get heartbeat interval, maximum number of
retransmissions, pathmtu, sackdelay time for a particular transport/
association/socket as per the latest SCTP sockets api draft11.
Signed-off-by: Frank Filz <ffilz@us.ibm.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index 268ddaf..68d73e2 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -86,10 +86,13 @@
peer->init_sent_count = 0;
peer->state = SCTP_ACTIVE;
- peer->hb_allowed = 0;
+ peer->param_flags = SPP_HB_DISABLE |
+ SPP_PMTUD_ENABLE |
+ SPP_SACKDELAY_ENABLE;
+ peer->hbinterval = 0;
/* Initialize the default path max_retrans. */
- peer->max_retrans = sctp_max_retrans_path;
+ peer->pathmaxrxt = sctp_max_retrans_path;
peer->error_count = 0;
INIT_LIST_HEAD(&peer->transmitted);
@@ -229,10 +232,10 @@
dst = transport->af_specific->get_dst(NULL, &transport->ipaddr, NULL);
if (dst) {
- transport->pmtu = dst_mtu(dst);
+ transport->pathmtu = dst_mtu(dst);
dst_release(dst);
} else
- transport->pmtu = SCTP_DEFAULT_MAXSEGMENT;
+ transport->pathmtu = SCTP_DEFAULT_MAXSEGMENT;
}
/* Caches the dst entry and source address for a transport's destination
@@ -254,8 +257,11 @@
af->get_saddr(asoc, dst, daddr, &transport->saddr);
transport->dst = dst;
+ if ((transport->param_flags & SPP_PMTUD_DISABLE) && transport->pathmtu) {
+ return;
+ }
if (dst) {
- transport->pmtu = dst_mtu(dst);
+ transport->pathmtu = dst_mtu(dst);
/* Initialize sk->sk_rcv_saddr, if the transport is the
* association's active path for getsockname().
@@ -264,7 +270,7 @@
opt->pf->af->to_sk_saddr(&transport->saddr,
asoc->base.sk);
} else
- transport->pmtu = SCTP_DEFAULT_MAXSEGMENT;
+ transport->pathmtu = SCTP_DEFAULT_MAXSEGMENT;
}
/* Hold a reference to a transport. */
@@ -369,7 +375,7 @@
ssthresh = transport->ssthresh;
pba = transport->partial_bytes_acked;
- pmtu = transport->asoc->pmtu;
+ pmtu = transport->asoc->pathmtu;
if (cwnd <= ssthresh) {
/* RFC 2960 7.2.1, sctpimpguide-05 2.14.2 When cwnd is less
@@ -441,8 +447,8 @@
* partial_bytes_acked = 0
*/
transport->ssthresh = max(transport->cwnd/2,
- 4*transport->asoc->pmtu);
- transport->cwnd = transport->asoc->pmtu;
+ 4*transport->asoc->pathmtu);
+ transport->cwnd = transport->asoc->pathmtu;
break;
case SCTP_LOWER_CWND_FAST_RTX:
@@ -459,7 +465,7 @@
* partial_bytes_acked = 0
*/
transport->ssthresh = max(transport->cwnd/2,
- 4*transport->asoc->pmtu);
+ 4*transport->asoc->pathmtu);
transport->cwnd = transport->ssthresh;
break;
@@ -479,7 +485,7 @@
if ((jiffies - transport->last_time_ecne_reduced) >
transport->rtt) {
transport->ssthresh = max(transport->cwnd/2,
- 4*transport->asoc->pmtu);
+ 4*transport->asoc->pathmtu);
transport->cwnd = transport->ssthresh;
transport->last_time_ecne_reduced = jiffies;
}
@@ -496,7 +502,7 @@
*/
if ((jiffies - transport->last_time_used) > transport->rto)
transport->cwnd = max(transport->cwnd/2,
- 4*transport->asoc->pmtu);
+ 4*transport->asoc->pathmtu);
break;
};
@@ -511,7 +517,7 @@
unsigned long sctp_transport_timeout(struct sctp_transport *t)
{
unsigned long timeout;
- timeout = t->hb_interval + t->rto + sctp_jitter(t->rto);
+ timeout = t->hbinterval + t->rto + sctp_jitter(t->rto);
timeout += jiffies;
return timeout;
}