[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>
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709dd3aaf5
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9e377202d2
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@ -300,6 +300,12 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
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goto out_invalid_packet;
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}
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if (dp->dccps_options.dccpo_send_ack_vector &&
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dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
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DCCP_SKB_CB(skb)->dccpd_seq,
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DCCP_ACKVEC_STATE_RECEIVED))
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goto out_invalid_packet; /* FIXME: change error code */
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dp->dccps_isr = DCCP_SKB_CB(skb)->dccpd_seq;
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dccp_update_gsr(sk, dp->dccps_isr);
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/*
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