Commit 9e377202 authored Jan 03, 2006 by Andrea Bittau Committed by David S. Miller Jan 03, 2006

[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>

parent 709dd3aa

net/dccp/input.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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);
		/*