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[DCCP]: Revert patch which disables bidirectional mode 

This reverts an earlier patch which disabled bidirectional mode, meaning that
a listening (passive) socket was not allowed to write to the other (active)
end of the connection.

This mode had been disabled when there were problems with CCID3, but it
imposes a constraint on socket programming and thus hinders deployment.

A change is included to ignore RX feedback received by the TX CCID3 module.

Many thanks to Andre Noll for pointing out this issue.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gerrit Renker 2007-03-07 12:53:48 -08:00 committed by David S. Miller
parent 286930797d
commit 151a99317e
2 changed files with 5 additions and 23 deletions
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7
net/dccp/ccids/ccid3.c
View File

@ -545,12 +545,7 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
/* set idle flag */
hctx->ccid3hctx_idle = 1;
break;
case TFRC_SSTATE_NO_SENT:
/*
* XXX when implementing bidirectional rx/tx check this again
*/
DCCP_WARN("Illegal ACK received - no packet sent\n");
/* fall through */
case TFRC_SSTATE_NO_SENT: /* fall through */
case TFRC_SSTATE_TERM: /* ignore feedback when closing */
break;
}

21
net/dccp/input.c
View File

@ -248,18 +248,8 @@ int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
DCCP_ACKVEC_STATE_RECEIVED))
goto discard;
/*
* 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_CLIENT)
ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
else /* listening or connected server */
ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
return __dccp_rcv_established(sk, skb, dh, len);
discard:
@ -494,11 +484,8 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
DCCP_ACKVEC_STATE_RECEIVED))
goto discard;
/* XXX see the comments in dccp_rcv_established about this */
if (dccp_sk(sk)->dccps_role == DCCP_ROLE_CLIENT)
ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
else
ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
}
/*