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sctp: add support for generating stream ssn reset event notification

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

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2017-02-17 12:45:38 +08:00 committed by David S. Miller
parent bd4b9f8b4a
commit 35ea82d611
3 changed files with 49 additions and 0 deletions
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4
include/net/sctp/ulpevent.h
View File

@ -128,6 +128,10 @@ struct sctp_ulpevent *sctp_ulpevent_make_authkey(
struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event( struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
const struct sctp_association *asoc, gfp_t gfp); 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, void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
struct msghdr *); struct msghdr *);
void sctp_ulpevent_read_rcvinfo(const struct sctp_ulpevent *event, void sctp_ulpevent_read_rcvinfo(const struct sctp_ulpevent *event,

16
include/uapi/linux/sctp.h
View File

@ -490,6 +490,18 @@ struct sctp_sender_dry_event {
sctp_assoc_t sender_dry_assoc_id; 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 * Described in Section 7.3
* Ancillary Data and Notification Interest Options * Ancillary Data and Notification Interest Options
@ -505,6 +517,7 @@ struct sctp_event_subscribe {
__u8 sctp_adaptation_layer_event; __u8 sctp_adaptation_layer_event;
__u8 sctp_authentication_event; __u8 sctp_authentication_event;
__u8 sctp_sender_dry_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_pdapi_event sn_pdapi_event;
struct sctp_authkey_event sn_authkey_event; struct sctp_authkey_event sn_authkey_event;
struct sctp_sender_dry_event sn_sender_dry_event; struct sctp_sender_dry_event sn_sender_dry_event;
struct sctp_stream_reset_event sn_strreset_event;
}; };
/* Section 5.3.1 /* Section 5.3.1
@ -556,6 +570,8 @@ enum sctp_sn_type {
#define SCTP_AUTHENTICATION_INDICATION SCTP_AUTHENTICATION_EVENT #define SCTP_AUTHENTICATION_INDICATION SCTP_AUTHENTICATION_EVENT
SCTP_SENDER_DRY_EVENT, SCTP_SENDER_DRY_EVENT,
#define SCTP_SENDER_DRY_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 /* Notification error codes used to fill up the error fields in some

29
net/sctp/ulpevent.c
View File

@ -854,6 +854,35 @@ struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
return 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 /* Return the notification type, assuming this is a notification
* event. * event.
*/ */