[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/associola.c b/net/sctp/associola.c
index dec68a6..9d05e13 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -110,7 +110,6 @@
asoc->cookie_life.tv_sec = sp->assocparams.sasoc_cookie_life / 1000;
asoc->cookie_life.tv_usec = (sp->assocparams.sasoc_cookie_life % 1000)
* 1000;
- asoc->pmtu = 0;
asoc->frag_point = 0;
/* Set the association max_retrans and RTO values from the
@@ -123,6 +122,25 @@
asoc->overall_error_count = 0;
+ /* Initialize the association's heartbeat interval based on the
+ * sock configured value.
+ */
+ asoc->hbinterval = msecs_to_jiffies(sp->hbinterval);
+
+ /* Initialize path max retrans value. */
+ asoc->pathmaxrxt = sp->pathmaxrxt;
+
+ /* Initialize default path MTU. */
+ asoc->pathmtu = sp->pathmtu;
+
+ /* Set association default SACK delay */
+ asoc->sackdelay = msecs_to_jiffies(sp->sackdelay);
+
+ /* Set the association default flags controlling
+ * Heartbeat, SACK delay, and Path MTU Discovery.
+ */
+ asoc->param_flags = sp->param_flags;
+
/* Initialize the maximum mumber of new data packets that can be sent
* in a burst.
*/
@@ -144,8 +162,7 @@
= 5 * asoc->rto_max;
asoc->timeouts[SCTP_EVENT_TIMEOUT_HEARTBEAT] = 0;
- asoc->timeouts[SCTP_EVENT_TIMEOUT_SACK] =
- SCTP_DEFAULT_TIMEOUT_SACK;
+ asoc->timeouts[SCTP_EVENT_TIMEOUT_SACK] = asoc->sackdelay;
asoc->timeouts[SCTP_EVENT_TIMEOUT_AUTOCLOSE] =
sp->autoclose * HZ;
@@ -540,23 +557,46 @@
sctp_transport_set_owner(peer, asoc);
+ /* Initialize the peer's heartbeat interval based on the
+ * association configured value.
+ */
+ peer->hbinterval = asoc->hbinterval;
+
+ /* Set the path max_retrans. */
+ peer->pathmaxrxt = asoc->pathmaxrxt;
+
+ /* Initialize the peer's SACK delay timeout based on the
+ * association configured value.
+ */
+ peer->sackdelay = asoc->sackdelay;
+
+ /* Enable/disable heartbeat, SACK delay, and path MTU discovery
+ * based on association setting.
+ */
+ peer->param_flags = asoc->param_flags;
+
/* Initialize the pmtu of the transport. */
- sctp_transport_pmtu(peer);
+ if (peer->param_flags & SPP_PMTUD_ENABLE)
+ sctp_transport_pmtu(peer);
+ else if (asoc->pathmtu)
+ peer->pathmtu = asoc->pathmtu;
+ else
+ peer->pathmtu = SCTP_DEFAULT_MAXSEGMENT;
/* If this is the first transport addr on this association,
* initialize the association PMTU to the peer's PMTU.
* If not and the current association PMTU is higher than the new
* peer's PMTU, reset the association PMTU to the new peer's PMTU.
*/
- if (asoc->pmtu)
- asoc->pmtu = min_t(int, peer->pmtu, asoc->pmtu);
+ if (asoc->pathmtu)
+ asoc->pathmtu = min_t(int, peer->pathmtu, asoc->pathmtu);
else
- asoc->pmtu = peer->pmtu;
+ asoc->pathmtu = peer->pathmtu;
SCTP_DEBUG_PRINTK("sctp_assoc_add_peer:association %p PMTU set to "
- "%d\n", asoc, asoc->pmtu);
+ "%d\n", asoc, asoc->pathmtu);
- asoc->frag_point = sctp_frag_point(sp, asoc->pmtu);
+ asoc->frag_point = sctp_frag_point(sp, asoc->pathmtu);
/* The asoc->peer.port might not be meaningful yet, but
* initialize the packet structure anyway.
@@ -574,7 +614,7 @@
* (for example, implementations MAY use the size of the
* receiver advertised window).
*/
- peer->cwnd = min(4*asoc->pmtu, max_t(__u32, 2*asoc->pmtu, 4380));
+ peer->cwnd = min(4*asoc->pathmtu, max_t(__u32, 2*asoc->pathmtu, 4380));
/* At this point, we may not have the receiver's advertised window,
* so initialize ssthresh to the default value and it will be set
@@ -585,17 +625,6 @@
peer->partial_bytes_acked = 0;
peer->flight_size = 0;
- /* By default, enable heartbeat for peer address. */
- peer->hb_allowed = 1;
-
- /* Initialize the peer's heartbeat interval based on the
- * sock configured value.
- */
- peer->hb_interval = msecs_to_jiffies(sp->paddrparam.spp_hbinterval);
-
- /* Set the path max_retrans. */
- peer->max_retrans = sp->paddrparam.spp_pathmaxrxt;
-
/* Set the transport's RTO.initial value */
peer->rto = asoc->rto_initial;
@@ -1155,18 +1184,18 @@
/* Get the lowest pmtu of all the transports. */
list_for_each(pos, &asoc->peer.transport_addr_list) {
t = list_entry(pos, struct sctp_transport, transports);
- if (!pmtu || (t->pmtu < pmtu))
- pmtu = t->pmtu;
+ if (!pmtu || (t->pathmtu < pmtu))
+ pmtu = t->pathmtu;
}
if (pmtu) {
struct sctp_sock *sp = sctp_sk(asoc->base.sk);
- asoc->pmtu = pmtu;
+ asoc->pathmtu = pmtu;
asoc->frag_point = sctp_frag_point(sp, pmtu);
}
SCTP_DEBUG_PRINTK("%s: asoc:%p, pmtu:%d, frag_point:%d\n",
- __FUNCTION__, asoc, asoc->pmtu, asoc->frag_point);
+ __FUNCTION__, asoc, asoc->pathmtu, asoc->frag_point);
}
/* Should we send a SACK to update our peer? */
@@ -1179,7 +1208,7 @@
case SCTP_STATE_SHUTDOWN_SENT:
if ((asoc->rwnd > asoc->a_rwnd) &&
((asoc->rwnd - asoc->a_rwnd) >=
- min_t(__u32, (asoc->base.sk->sk_rcvbuf >> 1), asoc->pmtu)))
+ min_t(__u32, (asoc->base.sk->sk_rcvbuf >> 1), asoc->pathmtu)))
return 1;
break;
default: