Commit ddc4bbee authored by Michio Honda's avatar Michio Honda Committed by David S. Miller
Browse files

sctp: fasthandoff with ASCONF at mobile-node 



Fast retransmission after changing the last address
with ASCONF negotiation

Signed-off-by: default avatarMichio Honda <micchie@sfc.wide.ad.jp>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8ce120f1

include/net/sctp/structs.h

+1 −0
Original line number Diff line number Diff line
@@ -1085,6 +1085,7 @@ void sctp_transport_burst_reset(struct sctp_transport *); 
unsigned long sctp_transport_timeout(struct sctp_transport *);

void sctp_transport_reset(struct sctp_transport *);

void sctp_transport_update_pmtu(struct sctp_transport *, u32);

void sctp_transport_immediate_rtx(struct sctp_transport *);





/* This is the structure we use to queue packets as they come into

net/sctp/sm_make_chunk.c

+3 −1
Original line number Diff line number Diff line
@@ -3400,8 +3400,10 @@ int sctp_process_asconf_ack(struct sctp_association *asoc, 
		asconf_len -= length;

	}



	if (no_err && asoc->src_out_of_asoc_ok)

	if (no_err && asoc->src_out_of_asoc_ok) {

		asoc->src_out_of_asoc_ok = 0;

		sctp_transport_immediate_rtx(asoc->peer.primary_path);

	}



	/* Free the cached last sent asconf chunk. */

	list_del_init(&asconf->transmitted_list);

net/sctp/transport.c

+16 −0
Original line number Diff line number Diff line
@@ -641,3 +641,19 @@ void sctp_transport_reset(struct sctp_transport *t) 
	t->cacc.next_tsn_at_change = 0;

	t->cacc.cacc_saw_newack = 0;

}



/* Schedule retransmission on the given transport */

void sctp_transport_immediate_rtx(struct sctp_transport *t)

{

	/* Stop pending T3_rtx_timer */

	if (timer_pending(&t->T3_rtx_timer)) {

		(void)del_timer(&t->T3_rtx_timer);

		sctp_transport_put(t);

	}

	sctp_retransmit(&t->asoc->outqueue, t, SCTP_RTXR_T3_RTX);

	if (!timer_pending(&t->T3_rtx_timer)) {

		if (!mod_timer(&t->T3_rtx_timer, jiffies + t->rto))

			sctp_transport_hold(t);

	}

	return;

}