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[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>
This commit is contained in:
Andrea Bittau 2006-01-03 14:25:49 -08:00 committed by David S. Miller
parent 709dd3aaf5
commit 9e377202d2
1 changed files with 6 additions and 0 deletions
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6
net/dccp/input.c
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@ -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);
/*