diff options
| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2007-04-18 23:11:06 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-18 23:16:09 +0200 |
| commit | d0cf0d9940ef27b46fcbbd9e0cc8427c30fe05eb (patch) | |
| tree | 0ac9e4b58b7a14c1215bf0516e8adf8e065cd081 /net | |
| parent | [IPSEC] af_key: Fix thinko in pfkey_xfrm_policy2msg() (diff) | |
| download | linux-d0cf0d9940ef27b46fcbbd9e0cc8427c30fe05eb.tar.xz linux-d0cf0d9940ef27b46fcbbd9e0cc8427c30fe05eb.zip | |
[SCTP]: Do not interleave non-fragments when in partial delivery
The way partial delivery is currently implemnted, it is possible to
intereleave a message (either from another steram, or unordered) that
is not part of partial delivery process. The only way to this is for
a message to not be a fragment and be 'in order' or unorderd for a
given stream. This will result in bypassing the reassembly/ordering
queues where things live duing partial delivery, and the
message will be delivered to the socket in the middle of partial delivery.
This is a two-fold problem, in that:
1. the app now must check the stream-id and flags which it may not
be doing.
2. this clearing partial delivery state from the association and results
in ulp hanging.
This patch is a band-aid over a much bigger problem in that we
don't do stream interleave.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sctp/ulpqueue.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c index bfb197e37da3..b29e3e4b72c9 100644 --- a/net/sctp/ulpqueue.c +++ b/net/sctp/ulpqueue.c @@ -190,7 +190,14 @@ int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event) if (!sctp_sk(sk)->pd_mode) { queue = &sk->sk_receive_queue; } else if (ulpq->pd_mode) { - if (event->msg_flags & MSG_NOTIFICATION) + /* If the association is in partial delivery, we + * need to finish delivering the partially processed + * packet before passing any other data. This is + * because we don't truly support stream interleaving. + */ + if ((event->msg_flags & MSG_NOTIFICATION) || + (SCTP_DATA_NOT_FRAG == + (event->msg_flags & SCTP_DATA_FRAG_MASK))) queue = &sctp_sk(sk)->pd_lobby; else { clear_pd = event->msg_flags & MSG_EOR; |