[DCCP]: Send Reset upon Sync in state REQUEST
This makes a small update so that the code corresponds to RFC 4340, 7.5.4,
which has the exception that a Sync received in state REQUEST generates
a Reset (not a SyncAck).
This is almost already supported by dccp_rcv_request_sent_state_process(),
including the correct Reset Code number 4 ("Packet Error"); all that has to be
done (and is done here) is shifting the if-statement a few lines further down.
(To test this case: replace DCCP_PKT_RESPONSE with DCCP_PKT_SYNC
in dccp_make_response.)
Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
---
net/dccp/input.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -575,11 +575,6 @@ int dccp_rcv_state_process(struct sock *
return 0;
}
- if (unlikely(dh->dccph_type == DCCP_PKT_SYNC)) {
- dccp_send_sync(sk, dcb->dccpd_seq, DCCP_PKT_SYNCACK);
- goto discard;
- }
-
switch (sk->sk_state) {
case DCCP_CLOSED:
dcb->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
@@ -610,8 +605,12 @@ int dccp_rcv_state_process(struct sock *
sk_wake_async(sk, 0, POLL_OUT);
break;
}
+ } else if (unlikely(dh->dccph_type == DCCP_PKT_SYNC)) {
+ dccp_send_sync(sk, dcb->dccpd_seq, DCCP_PKT_SYNCACK);
+ goto discard;
}
+
if (!queued) {
discard:
__kfree_skb(skb);
-
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