[SCTP]: Implement sac_info field in SCTP_ASSOC_CHANGE notification.

As stated in the sctp socket api draft:

   sac_info: variable

   If the sac_state is SCTP_COMM_LOST and an ABORT chunk was received
   for this association, sac_info[] contains the complete ABORT chunk as
   defined in the SCTP specification RFC2960 [RFC2960] section 3.3.7.

We now save received ABORT chunks into the sac_info field and pass that
to the user.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 3 deletions

diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 135567493119..0a1a197193a2 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -464,7 +464,7 @@ static void sctp_cmd_init_failed(sctp_cmd_seq_t *commands,
         struct sctp_ulpevent *event;
 
         event = sctp_ulpevent_make_assoc_change(asoc,0, SCTP_CANT_STR_ASSOC,
-                                                (__u16)error, 0, 0,
+                                                (__u16)error, 0, 0, NULL,
                                                 GFP_ATOMIC);
 
         if (event)
@@ -492,8 +492,13 @@ static void sctp_cmd_assoc_failed(sctp_cmd_seq_t *commands,
         /* Cancel any partial delivery in progress. */
         sctp_ulpq_abort_pd(&asoc->ulpq, GFP_ATOMIC);
 
-        event = sctp_ulpevent_make_assoc_change(asoc, 0, SCTP_COMM_LOST,
-                                                (__u16)error, 0, 0,
+        if (event_type == SCTP_EVENT_T_CHUNK && subtype.chunk == SCTP_CID_ABORT)
+                event = sctp_ulpevent_make_assoc_change(asoc, 0, SCTP_COMM_LOST,
+                                                (__u16)error, 0, 0, chunk,
+                                                GFP_ATOMIC);
+        else
+                event = sctp_ulpevent_make_assoc_change(asoc, 0, SCTP_COMM_LOST,
+                                                (__u16)error, 0, 0, NULL,
                                                 GFP_ATOMIC);
         if (event)
                 sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,