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Commit 0b58a811 authored by Vlad Yasevich's avatar Vlad Yasevich Committed by David S. Miller
Browse files

[SCTP]: Clean up stale data during association restart 



During association restart we may have stale data sitting
on the ULP queue waiting for ordering or reassembly.  This
data may cause severe problems if not cleaned up.  In particular
stale data pending ordering may cause problems with receive
window exhaustion if our peer has decided to restart the
association.

Signed-off-by: default avatarVlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: default avatarSridhar Samudrala <sri@us.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c577c2b9

include/net/sctp/ulpqueue.h

+1 −0
Original line number Diff line number Diff line
@@ -59,6 +59,7 @@ struct sctp_ulpq { 
/* Prototypes. */

struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *,

				 struct sctp_association *);

void sctp_ulpq_flush(struct sctp_ulpq *ulpq);

void sctp_ulpq_free(struct sctp_ulpq *);



/* Add a new DATA chunk for processing. */

net/sctp/associola.c

+6 −0
Original line number Diff line number Diff line
@@ -1063,6 +1063,12 @@ void sctp_assoc_update(struct sctp_association *asoc, 
		 */

		sctp_ssnmap_clear(asoc->ssnmap);



		/* Flush the ULP reassembly and ordered queue.

		 * Any data there will now be stale and will

		 * cause problems.

		 */

		sctp_ulpq_flush(&asoc->ulpq);



	} else {

		/* Add any peer addresses from the new association. */

		list_for_each(pos, &new->peer.transport_addr_list) {

net/sctp/ulpqueue.c

+1 −1
Original line number Diff line number Diff line
@@ -73,7 +73,7 @@ struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *ulpq, 




/* Flush the reassembly and ordering queues.  */

static void sctp_ulpq_flush(struct sctp_ulpq *ulpq)

void sctp_ulpq_flush(struct sctp_ulpq *ulpq)

{

	struct sk_buff *skb;

	struct sctp_ulpevent *event;