[DCCP]: Move the ack vector code to net/dccp/ackvec.[ch]

Isolating it, that will be used when we introduce a CCID2 (TCP-Like)
implementation.

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

1 files changed, 13 insertions, 56 deletions

diff --git a/net/dccp/input.c b/net/dccp/input.c
index 062e9f8359d0..1b6b2cb12376 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -16,6 +16,7 @@
 
 #include <net/sock.h>
 
+#include "ackvec.h"
 #include "ccid.h"
 #include "dccp.h"
 
@@ -60,8 +61,8 @@ static inline void dccp_event_ack_recv(struct sock *sk, struct sk_buff *skb)
         struct dccp_sock *dp = dccp_sk(sk);
 
         if (dp->dccps_options.dccpo_send_ack_vector)
-                dccp_ackpkts_check_rcv_ackno(dp->dccps_hc_rx_ackpkts, sk,
-                                             DCCP_SKB_CB(skb)->dccpd_ack_seq);
+                dccp_ackvec_check_rcv_ackno(dp->dccps_hc_rx_ackvec, sk,
+                                            DCCP_SKB_CB(skb)->dccpd_ack_seq);
 }
 
 static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
@@ -164,37 +165,11 @@ int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
         if (DCCP_SKB_CB(skb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
                 dccp_event_ack_recv(sk, skb);
 
-        /*
-         * FIXME: check ECN to see if we should use
-         * DCCP_ACKPKTS_STATE_ECN_MARKED
-         */
-        if (dp->dccps_options.dccpo_send_ack_vector) {
-                struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
-
-                if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts, sk,
-                                     DCCP_SKB_CB(skb)->dccpd_seq,
-                                     DCCP_ACKPKTS_STATE_RECEIVED)) {
-                        LIMIT_NETDEBUG(KERN_WARNING "DCCP: acknowledgeable "
-                                                    "packets buffer full!\n");
-                        ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
-                        inet_csk_schedule_ack(sk);
-                        inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
-                                                  TCP_DELACK_MIN,
-                                                  DCCP_RTO_MAX);
-                        goto discard;
-                }
-
-                /*
-                 * FIXME: this activation is probably wrong, have to study more
-                 * TCP delack machinery and how it fits into DCCP draft, but
-                 * for now it kinda "works" 8)
-                 */
-                if (!inet_csk_ack_scheduled(sk)) {
-                        inet_csk_schedule_ack(sk);
-                        inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK, 5 * HZ,
-                                                  DCCP_RTO_MAX);
-                }
-        }
+        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 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);
@@ -495,29 +470,11 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *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);
 
-                /*
-                 * FIXME: check ECN to see if we should use
-                 * DCCP_ACKPKTS_STATE_ECN_MARKED
-                 */
-                if (dp->dccps_options.dccpo_send_ack_vector) {
-                        if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts, sk,
-                                             dcb->dccpd_seq,
-                                             DCCP_ACKPKTS_STATE_RECEIVED))
-                                goto discard;
-                        /*
-                         * FIXME: this activation is probably wrong, have to
-                         * study more TCP delack machinery and how it fits into
-                         * DCCP draft, but for now it kinda "works" 8)
-                         */
-                        if ((dp->dccps_hc_rx_ackpkts->dccpap_ack_seqno ==
-                             DCCP_MAX_SEQNO + 1) &&
-                            !inet_csk_ack_scheduled(sk)) {
-                                inet_csk_schedule_ack(sk);
-                                inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
-                                                          TCP_DELACK_MIN,
-                                                          DCCP_RTO_MAX);
-                        }
-                }
+                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 discard;
         }
 
         /*