[PATCH 1/2] sctp: fasthandoff with ASCONF at mobile-node
From: Michio Honda <hidden>
Date: 2011-11-08 16:31:57
Subsystem:
networking [general], sctp protocol, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Marcelo Ricardo Leitner, Xin Long, Linus Torvalds
From d42e880c330693ceb0e03a48d1e4347b190d0cce Mon Sep 17 00:00:00 2001
From: Michio Honda <redacted> Date: Fri, 17 Jun 2011 11:03:23 +0900 Subject: [PATCH 1/2] sctp: fasthandoff with ASCONF at mobile-node Fast retransmission after changing the last address with ASCONF negotiation Signed-off-by: Michio Honda <redacted> --- include/net/sctp/structs.h | 1 + net/sctp/sm_make_chunk.c | 4 +++- net/sctp/transport.c | 16 ++++++++++++++++ 3 files changed, 20 insertions(+), 1 deletions(-)
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index e90e7a9..3382615 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h@@ -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
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 0121e0a..a85eeeb 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c@@ -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);
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index 394c57c..3889330 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c@@ -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; +}
--
1.7.3.2