From b444153fb5a647448c2080ad28656ad183cae4fc Mon Sep 17 00:00:00 2001 From: Xin Long Date: Fri, 10 Mar 2017 12:11:08 +0800 Subject: [PATCH] sctp: add support for generating add stream change event notification This patch is to add Stream Change Event described in rfc6525 section 6.1.3. Signed-off-by: Xin Long Signed-off-by: David S. Miller --- include/net/sctp/ulpevent.h | 4 ++++ include/uapi/linux/sctp.h | 15 +++++++++++++++ net/sctp/ulpevent.c | 28 ++++++++++++++++++++++++++++ 3 files changed, 47 insertions(+) diff --git a/include/net/sctp/ulpevent.h b/include/net/sctp/ulpevent.h index 2ab7ed44de52..1060494ac230 100644 --- a/include/net/sctp/ulpevent.h +++ b/include/net/sctp/ulpevent.h @@ -136,6 +136,10 @@ struct sctp_ulpevent *sctp_ulpevent_make_assoc_reset_event( const struct sctp_association *asoc, __u16 flags, __u32 local_tsn, __u32 remote_tsn, gfp_t gfp); +struct sctp_ulpevent *sctp_ulpevent_make_stream_change_event( + const struct sctp_association *asoc, __u16 flags, + __u32 strchange_instrms, __u32 strchange_outstrms, 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, diff --git a/include/uapi/linux/sctp.h b/include/uapi/linux/sctp.h index 77358297c2f9..fd652e6501b4 100644 --- a/include/uapi/linux/sctp.h +++ b/include/uapi/linux/sctp.h @@ -513,6 +513,17 @@ struct sctp_assoc_reset_event { __u32 assocreset_remote_tsn; }; +#define SCTP_ASSOC_CHANGE_DENIED 0x0004 +#define SCTP_ASSOC_CHANGE_FAILED 0x0008 +struct sctp_stream_change_event { + __u16 strchange_type; + __u16 strchange_flags; + __u32 strchange_length; + sctp_assoc_t strchange_assoc_id; + __u16 strchange_instrms; + __u16 strchange_outstrms; +}; + /* * Described in Section 7.3 * Ancillary Data and Notification Interest Options @@ -530,6 +541,7 @@ struct sctp_event_subscribe { __u8 sctp_sender_dry_event; __u8 sctp_stream_reset_event; __u8 sctp_assoc_reset_event; + __u8 sctp_stream_change_event; }; /* @@ -556,6 +568,7 @@ union sctp_notification { struct sctp_sender_dry_event sn_sender_dry_event; struct sctp_stream_reset_event sn_strreset_event; struct sctp_assoc_reset_event sn_assocreset_event; + struct sctp_stream_change_event sn_strchange_event; }; /* Section 5.3.1 @@ -587,6 +600,8 @@ enum sctp_sn_type { #define SCTP_STREAM_RESET_EVENT SCTP_STREAM_RESET_EVENT SCTP_ASSOC_RESET_EVENT, #define SCTP_ASSOC_RESET_EVENT SCTP_ASSOC_RESET_EVENT + SCTP_STREAM_CHANGE_EVENT, +#define SCTP_STREAM_CHANGE_EVENT SCTP_STREAM_CHANGE_EVENT }; /* Notification error codes used to fill up the error fields in some diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c index 420d7f35256a..ec2b3e013c2f 100644 --- a/net/sctp/ulpevent.c +++ b/net/sctp/ulpevent.c @@ -911,6 +911,34 @@ struct sctp_ulpevent *sctp_ulpevent_make_assoc_reset_event( return event; } +struct sctp_ulpevent *sctp_ulpevent_make_stream_change_event( + const struct sctp_association *asoc, __u16 flags, + __u32 strchange_instrms, __u32 strchange_outstrms, gfp_t gfp) +{ + struct sctp_stream_change_event *schange; + struct sctp_ulpevent *event; + struct sk_buff *skb; + + event = sctp_ulpevent_new(sizeof(struct sctp_stream_change_event), + MSG_NOTIFICATION, gfp); + if (!event) + return NULL; + + skb = sctp_event2skb(event); + schange = (struct sctp_stream_change_event *) + skb_put(skb, sizeof(struct sctp_stream_change_event)); + + schange->strchange_type = SCTP_STREAM_CHANGE_EVENT; + schange->strchange_flags = flags; + schange->strchange_length = sizeof(struct sctp_stream_change_event); + sctp_ulpevent_set_owner(event, asoc); + schange->strchange_assoc_id = sctp_assoc2id(asoc); + schange->strchange_instrms = strchange_instrms; + schange->strchange_outstrms = strchange_outstrms; + + return event; +} + /* Return the notification type, assuming this is a notification * event. */