diff options
| author | Andrea Bittau <a.bittau@cs.ucl.ac.uk> | 2006-01-03 14:25:49 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-01-03 14:25:49 -0800 |
| commit | 9e377202d2c968dde8efd6121d94c7f0a77787aa (patch) | |
| tree | e52e9cbd49a99bcbac5bb4831b12bd5b1cb23f18 /net | |
| parent | 709dd3aaf5304993083c2297c73f5531c36fba5a (diff) | |
| download | lwn-9e377202d2c968dde8efd6121d94c7f0a77787aa.tar.gz lwn-9e377202d2c968dde8efd6121d94c7f0a77787aa.zip | |
[DCCP]: Send an ACK vector when ACKing a response packet
If ACK vectors are used, each packet with an ACK should contain an ACK
vector. The only exception currently is response packets. It
probably is not a good idea to store ACK vector state before the
connection is completed (to help protect from syn floods).
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/dccp/input.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/dccp/input.c b/net/dccp/input.c index 5e312b04a7db..cb0f5c9af1ba 100644 --- a/net/dccp/input.c +++ b/net/dccp/input.c @@ -300,6 +300,12 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk, goto out_invalid_packet; } + if (dp->dccps_options.dccpo_send_ack_vector && + dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk, + DCCP_SKB_CB(skb)->dccpd_seq, + DCCP_ACKVEC_STATE_RECEIVED)) + goto out_invalid_packet; /* FIXME: change error code */ + dp->dccps_isr = DCCP_SKB_CB(skb)->dccpd_seq; dccp_update_gsr(sk, dp->dccps_isr); /* |