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path: root/net/sctp/sm_make_chunk.c
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Diffstat (limited to 'net/sctp/sm_make_chunk.c')
-rw-r--r--net/sctp/sm_make_chunk.c33
1 files changed, 30 insertions, 3 deletions
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index d01475f5f710..cc20bc39ee7c 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -87,7 +87,28 @@ static void *sctp_addto_chunk_fixed(struct sctp_chunk *, int len,
/* Control chunk destructor */
static void sctp_control_release_owner(struct sk_buff *skb)
{
- /*TODO: do memory release */
+ struct sctp_chunk *chunk = skb_shinfo(skb)->destructor_arg;
+
+ if (chunk->shkey) {
+ struct sctp_shared_key *shkey = chunk->shkey;
+ struct sctp_association *asoc = chunk->asoc;
+
+ /* refcnt == 2 and !list_empty mean after this release, it's
+ * not being used anywhere, and it's time to notify userland
+ * that this shkey can be freed if it's been deactivated.
+ */
+ if (shkey->deactivated && !list_empty(&shkey->key_list) &&
+ refcount_read(&shkey->refcnt) == 2) {
+ struct sctp_ulpevent *ev;
+
+ ev = sctp_ulpevent_make_authkey(asoc, shkey->key_id,
+ SCTP_AUTH_FREE_KEY,
+ GFP_KERNEL);
+ if (ev)
+ asoc->stream.si->enqueue_event(&asoc->ulpq, ev);
+ }
+ sctp_auth_shkey_release(chunk->shkey);
+ }
}
static void sctp_control_set_owner_w(struct sctp_chunk *chunk)
@@ -102,7 +123,12 @@ static void sctp_control_set_owner_w(struct sctp_chunk *chunk)
*
* For now don't do anything for now.
*/
+ if (chunk->auth) {
+ chunk->shkey = asoc->shkey;
+ sctp_auth_shkey_hold(chunk->shkey);
+ }
skb->sk = asoc ? asoc->base.sk : NULL;
+ skb_shinfo(skb)->destructor_arg = chunk;
skb->destructor = sctp_control_release_owner;
}
@@ -1271,7 +1297,8 @@ nodata:
return retval;
}
-struct sctp_chunk *sctp_make_auth(const struct sctp_association *asoc)
+struct sctp_chunk *sctp_make_auth(const struct sctp_association *asoc,
+ __u16 key_id)
{
struct sctp_authhdr auth_hdr;
struct sctp_hmac *hmac_desc;
@@ -1289,7 +1316,7 @@ struct sctp_chunk *sctp_make_auth(const struct sctp_association *asoc)
return NULL;
auth_hdr.hmac_id = htons(hmac_desc->hmac_id);
- auth_hdr.shkey_id = htons(asoc->active_key_id);
+ auth_hdr.shkey_id = htons(key_id);
retval->subh.auth_hdr = sctp_addto_chunk(retval, sizeof(auth_hdr),
&auth_hdr);