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Commit 35ea82d6 authored by Xin Long's avatar Xin Long Committed by David S. Miller
Browse files

sctp: add support for generating stream ssn reset event notification 



This patch is to add Stream Reset Event described in rfc6525
section 6.1.1.

Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bd4b9f8b

include/net/sctp/ulpevent.h

+4 −0
Original line number Diff line number Diff line
@@ -128,6 +128,10 @@ struct sctp_ulpevent *sctp_ulpevent_make_authkey( 
struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(

	const struct sctp_association *asoc, gfp_t gfp);



struct sctp_ulpevent *sctp_ulpevent_make_stream_reset_event(

	const struct sctp_association *asoc, __u16 flags,

	__u16 stream_num, __u16 *stream_list, gfp_t gfp);



void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,

				   struct msghdr *);

void sctp_ulpevent_read_rcvinfo(const struct sctp_ulpevent *event,

include/uapi/linux/sctp.h

+16 −0
Original line number Diff line number Diff line
@@ -490,6 +490,18 @@ struct sctp_sender_dry_event { 
	sctp_assoc_t sender_dry_assoc_id;

};



#define SCTP_STREAM_RESET_INCOMING_SSN	0x0001

#define SCTP_STREAM_RESET_OUTGOING_SSN	0x0002

#define SCTP_STREAM_RESET_DENIED	0x0004

#define SCTP_STREAM_RESET_FAILED	0x0008

struct sctp_stream_reset_event {

	__u16 strreset_type;

	__u16 strreset_flags;

	__u32 strreset_length;

	sctp_assoc_t strreset_assoc_id;

	__u16 strreset_stream_list[];

};



/*

 * Described in Section 7.3

 *   Ancillary Data and Notification Interest Options
@@ -505,6 +517,7 @@ struct sctp_event_subscribe { 
	__u8 sctp_adaptation_layer_event;

	__u8 sctp_authentication_event;

	__u8 sctp_sender_dry_event;

	__u8 sctp_stream_reset_event;

};



/*
@@ -529,6 +542,7 @@ union sctp_notification { 
	struct sctp_pdapi_event sn_pdapi_event;

	struct sctp_authkey_event sn_authkey_event;

	struct sctp_sender_dry_event sn_sender_dry_event;

	struct sctp_stream_reset_event sn_strreset_event;

};



/* Section 5.3.1
@@ -556,6 +570,8 @@ enum sctp_sn_type { 
#define SCTP_AUTHENTICATION_INDICATION	SCTP_AUTHENTICATION_EVENT

	SCTP_SENDER_DRY_EVENT,

#define SCTP_SENDER_DRY_EVENT		SCTP_SENDER_DRY_EVENT

	SCTP_STREAM_RESET_EVENT,

#define SCTP_STREAM_RESET_EVENT		SCTP_STREAM_RESET_EVENT

};



/* Notification error codes used to fill up the error fields in some

net/sctp/ulpevent.c

+29 −0
Original line number Diff line number Diff line
@@ -854,6 +854,35 @@ struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event( 
	return event;

}



struct sctp_ulpevent *sctp_ulpevent_make_stream_reset_event(

	const struct sctp_association *asoc, __u16 flags, __u16 stream_num,

	__u16 *stream_list, gfp_t gfp)

{

	struct sctp_stream_reset_event *sreset;

	struct sctp_ulpevent *event;

	struct sk_buff *skb;

	int length, i;



	length = sizeof(struct sctp_stream_reset_event) + 2 * stream_num;

	event = sctp_ulpevent_new(length, MSG_NOTIFICATION, gfp);

	if (!event)

		return NULL;



	skb = sctp_event2skb(event);

	sreset = (struct sctp_stream_reset_event *)skb_put(skb, length);



	sreset->strreset_type = SCTP_STREAM_RESET_EVENT;

	sreset->strreset_flags = flags;

	sreset->strreset_length = length;

	sctp_ulpevent_set_owner(event, asoc);

	sreset->strreset_assoc_id = sctp_assoc2id(asoc);



	for (i = 0; i < stream_num; i++)

		sreset->strreset_stream_list[i] = ntohs(stream_list[i]);



	return event;

}



/* Return the notification type, assuming this is a notification

 * event.

 */