[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, 12 insertions, 70 deletions

diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index be7a660b6b24..5871c027f9dc 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -17,6 +17,7 @@
 #include <net/snmp.h>
 #include <net/sock.h>
 #include <net/tcp.h>
+#include "ackvec.h"
 
 #ifdef CONFIG_IP_DCCP_DEBUG
 extern int dccp_debug;
@@ -358,6 +359,17 @@ static inline void dccp_update_gss(struct sock *sk, u64 seq)
                        (dp->dccps_gss -
                         dp->dccps_options.dccpo_sequence_window + 1));
 }
+                                
+static inline int dccp_ack_pending(const struct sock *sk)
+{
+        const struct dccp_sock *dp = dccp_sk(sk);
+        return dp->dccps_timestamp_echo != 0 ||
+#ifdef CONFIG_IP_DCCP_ACKVEC
+               (dp->dccps_options.dccpo_send_ack_vector &&
+                dccp_ackvec_pending(dp->dccps_hc_rx_ackvec)) ||
+#endif
+               inet_csk_ack_scheduled(sk);
+}
 
 extern void dccp_insert_options(struct sock *sk, struct sk_buff *skb);
 extern void dccp_insert_option_elapsed_time(struct sock *sk,
@@ -371,65 +383,6 @@ extern void dccp_insert_option(struct sock *sk, struct sk_buff *skb,
 
 extern struct socket *dccp_ctl_socket;
 
-#define DCCP_ACKPKTS_STATE_RECEIVED     0
-#define DCCP_ACKPKTS_STATE_ECN_MARKED   (1 << 6)
-#define DCCP_ACKPKTS_STATE_NOT_RECEIVED (3 << 6)
-
-#define DCCP_ACKPKTS_STATE_MASK         0xC0 /* 11000000 */
-#define DCCP_ACKPKTS_LEN_MASK           0x3F /* 00111111 */
-
-/** struct dccp_ackpkts - acknowledgeable packets
- *
- * This data structure is the one defined in the DCCP draft
- * Appendix A.
- *
- * @dccpap_buf_head - circular buffer head
- * @dccpap_buf_tail - circular buffer tail
- * @dccpap_buf_ackno - ack # of the most recent packet acknowledgeable in the
- *                     buffer (i.e. %dccpap_buf_head)
- * @dccpap_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked
- *                     by the buffer with State 0
- *
- * Additionally, the HC-Receiver must keep some information about the
- * Ack Vectors it has recently sent. For each packet sent carrying an
- * Ack Vector, it remembers four variables:
- *
- * @dccpap_ack_seqno - the Sequence Number used for the packet
- *                     (HC-Receiver seqno)
- * @dccpap_ack_ptr - the value of buf_head at the time of acknowledgement.
- * @dccpap_ack_ackno - the Acknowledgement Number used for the packet
- *                     (HC-Sender seqno)
- * @dccpap_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
- *
- * @dccpap_buf_len - circular buffer length
- * @dccpap_time         - the time in usecs
- * @dccpap_buf - circular buffer of acknowledgeable packets
- */
-struct dccp_ackpkts {
-        unsigned int            dccpap_buf_head;
-        unsigned int            dccpap_buf_tail;
-        u64                     dccpap_buf_ackno;
-        u64                     dccpap_ack_seqno;
-        u64                     dccpap_ack_ackno;
-        unsigned int            dccpap_ack_ptr;
-        unsigned int            dccpap_buf_vector_len;
-        unsigned int            dccpap_ack_vector_len;
-        unsigned int            dccpap_buf_len;
-        struct timeval          dccpap_time;
-        u8                      dccpap_buf_nonce;
-        u8                      dccpap_ack_nonce;
-        u8                      dccpap_buf[0];
-};
-
-extern struct dccp_ackpkts *
-                dccp_ackpkts_alloc(unsigned int len,
-                                  const unsigned int __nocast priority);
-extern void dccp_ackpkts_free(struct dccp_ackpkts *ap);
-extern int dccp_ackpkts_add(struct dccp_ackpkts *ap, const struct sock *sk,
-                            u64 ackno, u8 state);
-extern void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap,
-                                         struct sock *sk, u64 ackno);
-
 extern void dccp_timestamp(const struct sock *sk, struct timeval *tv);
 
 static inline suseconds_t timeval_usecs(const struct timeval *tv)
@@ -470,15 +423,4 @@ static inline void timeval_sub_usecs(struct timeval *tv,
         }
 }
 
-#ifdef CONFIG_IP_DCCP_DEBUG
-extern void dccp_ackvector_print(const u64 ackno,
-                                 const unsigned char *vector, int len);
-extern void dccp_ackpkts_print(const struct dccp_ackpkts *ap);
-#else
-static inline void dccp_ackvector_print(const u64 ackno,
-                                        const unsigned char *vector,
-                                        int len) { }
-static inline void dccp_ackpkts_print(const struct dccp_ackpkts *ap) { }
-#endif
-
 #endif /* _DCCP_H */