[DCCP] CCID: Improve CCID infrastructure

1. No need for ->ccid_init nor ->ccid_exit, this is what module_{init,exit}
   does and anynways neither ccid2 nor ccid3 were using it.

2. Rename struct ccid to struct ccid_operations and introduce struct ccid
   with a pointer to ccid_operations and rigth after it the rx or tx
   private state.

3. Remove the pointer to the state of the half connections from struct
   dccp_sock, now its derived thru ccid_priv() from the ccid pointer.

Now we also can implement the setsockopt for changing the CCID easily as
no ccid init routines can affect struct dccp_sock in any way that prevents
other CCIDs from working if a CCID switch operation is asked by apps.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 8 deletions

diff --git a/net/dccp/input.c b/net/dccp/input.c
index 4b6d43d8b920..67691a0592af 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -324,14 +324,6 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
                 dccp_set_seqno(&dp->dccps_swl,
                                max48(dp->dccps_swl, dp->dccps_isr));
 
-                if (ccid_hc_rx_init(dp->dccps_hc_rx_ccid, sk) != 0 ||
-                    ccid_hc_tx_init(dp->dccps_hc_tx_ccid, sk) != 0) {
-                        ccid_hc_rx_exit(dp->dccps_hc_rx_ccid, sk);
-                        ccid_hc_tx_exit(dp->dccps_hc_tx_ccid, sk);
-                        /* FIXME: send appropriate RESET code */
-                        goto out_invalid_packet;
-                }
-
                 dccp_sync_mss(sk, icsk->icsk_pmtu_cookie);
 
                 /*