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| author | Wei Yongjun <yjwei@cn.fujitsu.com> | 2011-04-17 17:29:03 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-04-21 10:35:44 -0700 |
| commit | e1cdd553d482ceb083fac5e544e8702fccefbfd6 (patch) | |
| tree | b2b0f0bdc7a90c03a91bba6289143ae0056c651a /net/sctp/sm_statefuns.c | |
| parent | ee916fd0fdb8f43dacaab431de3e1f7225039d72 (diff) | |
| download | lwn-e1cdd553d482ceb083fac5e544e8702fccefbfd6.tar.gz lwn-e1cdd553d482ceb083fac5e544e8702fccefbfd6.zip | |
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 <yjwei@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/sm_statefuns.c')
| -rw-r--r-- | net/sctp/sm_statefuns.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index 736847e44e7e..7f4a4f8368ee 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -5077,6 +5077,30 @@ sctp_disposition_t sctp_sf_ignore_primitive( ***************************************************************************/ /* + * 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. * * From Section 9.2: |