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sctp: fasthandoff with ASCONF at mobile-node 

Fast retransmission after changing the last address
with ASCONF negotiation

Signed-off-by: Michio Honda <micchie@sfc.wide.ad.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michio Honda 2011-06-17 11:03:23 +09:00 committed by David S. Miller
parent 8ce120f118
commit ddc4bbee6e
3 changed files with 20 additions and 1 deletions
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1
include/net/sctp/structs.h
View File

@ -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

4
net/sctp/sm_make_chunk.c
View File

@ -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);

16
net/sctp/transport.c
View File

@ -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;
}