From e1cdd553d482ceb083fac5e544e8702fccefbfd6 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Sun, 17 Apr 2011 17:29:03 +0000 Subject: sctp: implement event notification SCTP_SENDER_DRY_EVENT This patch implement event notification SCTP_SENDER_DRY_EVENT. SCTP Socket API Extensions: 6.1.9. SCTP_SENDER_DRY_EVENT When the SCTP stack has no more user data to send or retransmit, this notification is given to the user. Also, at the time when a user app subscribes to this event, if there is no data to be sent or retransmit, the stack will immediately send up this notification. Signed-off-by: Wei Yongjun Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/sctp/sm_statefuns.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'net/sctp/sm_statefuns.c') diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index 736847e44e7..7f4a4f8368e 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -5076,6 +5076,30 @@ sctp_disposition_t sctp_sf_ignore_primitive( * These are the state functions for the OTHER events. ***************************************************************************/ +/* + * When the SCTP stack has no more user data to send or retransmit, this + * notification is given to the user. Also, at the time when a user app + * subscribes to this event, if there is no data to be sent or + * retransmit, the stack will immediately send up this notification. + */ +sctp_disposition_t sctp_sf_do_no_pending_tsn( + const struct sctp_endpoint *ep, + const struct sctp_association *asoc, + const sctp_subtype_t type, + void *arg, + sctp_cmd_seq_t *commands) +{ + struct sctp_ulpevent *event; + + event = sctp_ulpevent_make_sender_dry_event(asoc, GFP_ATOMIC); + if (!event) + return SCTP_DISPOSITION_NOMEM; + + sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP, SCTP_ULPEVENT(event)); + + return SCTP_DISPOSITION_CONSUME; +} + /* * Start the shutdown negotiation. * -- cgit v1.2.3-70-g09d2