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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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17
include/net/sctp/user.h
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@ -354,6 +354,20 @@ struct sctp_authkey_event {
enum { SCTP_AUTH_NEWKEY = 0, };
/*
* 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.
*/
struct sctp_sender_dry_event {
__u16 sender_dry_type;
__u16 sender_dry_flags;
__u32 sender_dry_length;
sctp_assoc_t sender_dry_assoc_id;
};
/*
* Described in Section 7.3
@ -369,6 +383,7 @@ struct sctp_event_subscribe {
__u8 sctp_partial_delivery_event;
__u8 sctp_adaptation_layer_event;
__u8 sctp_authentication_event;
__u8 sctp_sender_dry_event;
};
/*
@ -392,6 +407,7 @@ union sctp_notification {
struct sctp_adaptation_event sn_adaptation_event;
struct sctp_pdapi_event sn_pdapi_event;
struct sctp_authkey_event sn_authkey_event;
struct sctp_sender_dry_event sn_sender_dry_event;
};
/* Section 5.3.1
@ -410,6 +426,7 @@ enum sctp_sn_type {
SCTP_ADAPTATION_INDICATION,
SCTP_AUTHENTICATION_EVENT,
#define SCTP_AUTHENTICATION_INDICATION SCTP_AUTHENTICATION_EVENT
SCTP_SENDER_DRY_EVENT,
};
/* Notification error codes used to fill up the error fields in some