[DCCP]: Only deliver to the CCID rx side in charge
This is an optimisation to reduce CPU load. The received feedback is now
only directed to the active CCID component, without requiring processing
also by the inactive one.
As a consequence, a similar test in ccid3.c is now redundant and is
also removed.
Justification:
Currently DCCP works as a unidirectional service, i.e. a listening server
is not at the same time a connecting client.
As far as I can see, several modifications are necessary until that
becomes possible.
At the present time, received feedback is both fed to the rx/tx CCID
modules. In unidirectional service, only one of these is active at any
one time.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
diff --git a/net/dccp/input.c b/net/dccp/input.c
index 7371a2f..4a3279c 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -248,8 +248,18 @@
DCCP_ACKVEC_STATE_RECEIVED))
goto discard;
- ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
- ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
+ /*
+ * Deliver to the CCID module in charge.
+ * FIXME: Currently DCCP operates one-directional only, i.e. a listening
+ * server is not at the same time a connecting client. There is
+ * not much sense in delivering to both rx/tx sides at the moment
+ * (only one is active at a time); when moving to bidirectional
+ * service, this needs to be revised.
+ */
+ if (dccp_sk(sk)->dccps_role == DCCP_ROLE_SERVER)
+ ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
+ else
+ ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
return __dccp_rcv_established(sk, skb, dh, len);
discard:
@@ -484,8 +494,11 @@
DCCP_ACKVEC_STATE_RECEIVED))
goto discard;
- ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
- ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
+ /* XXX see the comments in dccp_rcv_established about this */
+ if (dccp_sk(sk)->dccps_role == DCCP_ROLE_SERVER)
+ ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
+ else
+ ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
}
/*