sctp: implement event notification SCTP_SENDER_DRY_EVENT (e1cdd553) · Commits · 戴 / test

include/net/sctp/sm.h

+1 −0

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		@@ -165,6 +165,7 @@ sctp_state_fn_t sctp_sf_do_prm_requestheartbeat;
		sctp_state_fn_t sctp_sf_do_prm_asconf;

		/* Prototypes for other event state functions. */
		sctp_state_fn_t sctp_sf_do_no_pending_tsn;
		sctp_state_fn_t sctp_sf_do_9_2_start_shutdown;
		sctp_state_fn_t sctp_sf_do_9_2_shutdown_ack;
		sctp_state_fn_t sctp_sf_ignore_other;

+3 −0

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		@@ -132,6 +132,9 @@ struct sctp_ulpevent *sctp_ulpevent_make_authkey(
		const struct sctp_association *asoc, __u16 key_id,
		__u32 indication, gfp_t gfp);

		struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
		const struct sctp_association *asoc, gfp_t gfp);

		void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
		struct msghdr *);
		__u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event);

+17 −0

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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

+24 −0

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		@@ -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.
		*

+1 −1

Original line number	Diff line number	Diff line
		@@ -668,7 +668,7 @@ static const sctp_sm_table_entry_t primitive_event_table[SCTP_NUM_PRIMITIVE_TYPE
		/* SCTP_STATE_COOKIE_ECHOED */ \
		TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
		/* SCTP_STATE_ESTABLISHED */ \
		TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
		TYPE_SCTP_FUNC(sctp_sf_do_no_pending_tsn), \
		/* SCTP_STATE_SHUTDOWN_PENDING */ \
		TYPE_SCTP_FUNC(sctp_sf_do_9_2_start_shutdown), \
		/* SCTP_STATE_SHUTDOWN_SENT */ \