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authorAndrea Bittau <a.bittau@cs.ucl.ac.uk>2006-01-03 14:25:49 -0800
committerDavid S. Miller <davem@davemloft.net>2006-01-03 14:25:49 -0800
commit9e377202d2c968dde8efd6121d94c7f0a77787aa (patch)
treee52e9cbd49a99bcbac5bb4831b12bd5b1cb23f18 /net/dccp
parent709dd3aaf5304993083c2297c73f5531c36fba5a (diff)
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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>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/input.c6
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);
/*
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