tree ea024a03f12dad7a2074f71afd2b3148347323f0 parent caf2e7480ba587b7cb6902e1bfcd6832dfd393bf author Andrea Bittau 1136217289 -0200 committer Arnaldo Carvalho de Melo 1136217289 -0200 [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 Signed-off-by: Arnaldo Carvalho de Melo ------------------------------------------------------------------------------ input.c | 6 ++++++ 1 file changed, 6 insertions(+) ------------------------------------------------------------------------------ diff --git a/net/dccp/input.c b/net/dccp/input.c index 5e312b0..cb0f5c9 100644 --- a/net/dccp/input.c +++ b/net/dccp/input.c @@ -300,6 +300,12 @@ static int dccp_rcv_request_sent_state_p 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); /*