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[SCTP]: Implement sac_info field in SCTP_ASSOC_CHANGE notification.

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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>
This commit is contained in:
Vlad Yasevich
2007-03-23 11:34:08 -07:00
committed by David S. Miller
parent bdf3092af6
commit a5a35e7675
5 changed files with 59 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
net/sctp/ulpevent.c
View File

@@ -131,19 +131,54 @@ static inline void sctp_ulpevent_release_owner(struct sctp_ulpevent *event)
struct sctp_ulpevent *sctp_ulpevent_make_assoc_change(
const struct sctp_association *asoc,
__u16 flags, __u16 state, __u16 error, __u16 outbound,
__u16 inbound, gfp_t gfp)
__u16 inbound, struct sctp_chunk *chunk, gfp_t gfp)
{
struct sctp_ulpevent *event;
struct sctp_assoc_change *sac;
struct sk_buff *skb;
event = sctp_ulpevent_new(sizeof(struct sctp_assoc_change),
/* If the lower layer passed in the chunk, it will be
* an ABORT, so we need to include it in the sac_info.
*/
if (chunk) {
/* sctp_inqu_pop() has allready pulled off the chunk
* header. We need to put it back temporarily
*/
skb_push(chunk->skb, sizeof(sctp_chunkhdr_t));
/* Copy the chunk data to a new skb and reserve enough
* head room to use as notification.
*/
skb = skb_copy_expand(chunk->skb,
sizeof(struct sctp_assoc_change), 0, gfp);
if (!skb)
goto fail;
/* put back the chunk header now that we have a copy */
skb_pull(chunk->skb, sizeof(sctp_chunkhdr_t));
/* Embed the event fields inside the cloned skb. */
event = sctp_skb2event(skb);
sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize);
/* Include the notification structure */
sac = (struct sctp_assoc_change *)
skb_push(skb, sizeof(struct sctp_assoc_change));
/* Trim the buffer to the right length. */
skb_trim(skb, sizeof(struct sctp_assoc_change) +
ntohs(chunk->chunk_hdr->length));
} else {
event = sctp_ulpevent_new(sizeof(struct sctp_assoc_change),
MSG_NOTIFICATION, gfp);
if (!event)
goto fail;
skb = sctp_event2skb(event);
sac = (struct sctp_assoc_change *)
skb_put(skb, sizeof(struct sctp_assoc_change));
if (!event)
goto fail;
skb = sctp_event2skb(event);
sac = (struct sctp_assoc_change *) skb_put(skb,
sizeof(struct sctp_assoc_change));
}
/* Socket Extensions for SCTP
* 5.3.1.1 SCTP_ASSOC_CHANGE