/* Do accounting for bytes just read by user and release the references to
* the association.
*/
static void sctp_ulpevent_release_data(struct sctp_ulpevent *event)
{
struct sk_buff *skb, *frag;
unsigned int len;
/* Current stack structures assume that the rcv buffer is
* per socket. For UDP style sockets this is not true as
* multiple associations may be on a single UDP-style socket.
* Use the local private area of the skb to track the owning
* association.
*/
skb = sctp_event2skb(event);
len = skb->len;
if (!skb->data_len)
goto done;
/* Don't forget the fragments. */
for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) {
/* NOTE: skb_shinfos are recursive. Although IP returns
* skb's with only 1 level of fragments, SCTP reassembly can
* increase the levels.
*/
sctp_ulpevent_release_frag_data(sctp_skb2event(frag));
}
done:
sctp_assoc_rwnd_increase(event->asoc, len);
sctp_ulpevent_release_owner(event);
}
/* Free a ulpevent that has an owner. It includes releasing the reference
* to the owner, updating the rwnd in case of a DATA event and freeing the
* skb.
*/
void sctp_ulpevent_free(struct sctp_ulpevent *event)
{
if (sctp_ulpevent_is_notification(event))
sctp_ulpevent_release_owner(event);
else
sctp_ulpevent_release_data(event);
kfree_skb(sctp_event2skb(event));
}
static void sctp_ulpevent_release_frag_data(struct sctp_ulpevent *event)
{
struct sk_buff *skb, *frag;
skb = sctp_event2skb(event);
if (!skb->data_len)
goto done;
/* Don't forget the fragments. */
for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) {
/* NOTE: skb_shinfos are recursive. Although IP returns
* skb's with only 1 level of fragments, SCTP reassembly can
* increase the levels.
*/
sctp_ulpevent_release_frag_data(sctp_skb2event(frag));
}
done:
sctp_ulpevent_release_owner(event);
}
