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sctp: implement event notification SCTP_SENDER_DRY_EVENT

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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>
This commit is contained in:
Wei Yongjun 2011-04-17 17:29:03 +00:00 • committed by David S. Miller
parent ee916fd0fd
commit e1cdd553d4
6 changed files with 74 additions and 1 deletions
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28
net/sctp/ulpevent.c
View file

@ -862,6 +862,34 @@ fail:
return NULL;
}
/*
* Socket Extensions for SCTP
* 6.3.10. SCTP_SENDER_DRY_EVENT
*/
struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
const struct sctp_association *asoc, gfp_t gfp)
{
struct sctp_ulpevent *event;
struct sctp_sender_dry_event *sdry;
struct sk_buff *skb;
event = sctp_ulpevent_new(sizeof(struct sctp_sender_dry_event),
MSG_NOTIFICATION, gfp);
if (!event)
return NULL;
skb = sctp_event2skb(event);
sdry = (struct sctp_sender_dry_event *)
skb_put(skb, sizeof(struct sctp_sender_dry_event));
sdry->sender_dry_type = SCTP_SENDER_DRY_EVENT;
sdry->sender_dry_flags = 0;
sdry->sender_dry_length = sizeof(struct sctp_sender_dry_event);
sctp_ulpevent_set_owner(event, asoc);
sdry->sender_dry_assoc_id = sctp_assoc2id(asoc);
return event;
}
/* Return the notification type, assuming this is a notification
* event.