tcp: unify tcp flag macros

unify tcp flag macros: TCPHDR_FIN, TCPHDR_SYN, TCPHDR_RST, TCPHDR_PSH,
TCPHDR_ACK, TCPHDR_URG, TCPHDR_ECE and TCPHDR_CWR. TCBCB_FLAG_* are replaced
with the corresponding TCPHDR_*.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
----
 include/net/tcp.h                      |   24 ++++++-------
 net/ipv4/tcp.c                         |    8 ++--
 net/ipv4/tcp_input.c                   |    2 -
 net/ipv4/tcp_output.c                  |   59 ++++++++++++++++-----------------
 net/netfilter/nf_conntrack_proto_tcp.c |   32 ++++++-----------
 net/netfilter/xt_TCPMSS.c              |    4 --
 6 files changed, 58 insertions(+), 71 deletions(-)
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 13 deletions

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 573166484413..9e68e25c8b82 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -602,6 +602,17 @@ extern u32	__tcp_select_window(struct sock *sk);
  */
 #define tcp_time_stamp          ((__u32)(jiffies))
 
+#define tcp_flag_byte(th) (((u_int8_t *)th)[13])
+
+#define TCPHDR_FIN 0x01
+#define TCPHDR_SYN 0x02
+#define TCPHDR_RST 0x04
+#define TCPHDR_PSH 0x08
+#define TCPHDR_ACK 0x10
+#define TCPHDR_URG 0x20
+#define TCPHDR_ECE 0x40
+#define TCPHDR_CWR 0x80
+
 /* This is what the send packet queuing engine uses to pass
  * TCP per-packet control information to the transmission
  * code.  We also store the host-order sequence numbers in
@@ -620,19 +631,6 @@ struct tcp_skb_cb {
         __u32           end_seq;        /* SEQ + FIN + SYN + datalen    */
         __u32           when;           /* used to compute rtt's        */
         __u8            flags;          /* TCP header flags.            */
-
-        /* NOTE: These must match up to the flags byte in a
-         *       real TCP header.
-         */
-#define TCPCB_FLAG_FIN          0x01
-#define TCPCB_FLAG_SYN          0x02
-#define TCPCB_FLAG_RST          0x04
-#define TCPCB_FLAG_PSH          0x08
-#define TCPCB_FLAG_ACK          0x10
-#define TCPCB_FLAG_URG          0x20
-#define TCPCB_FLAG_ECE          0x40
-#define TCPCB_FLAG_CWR          0x80
-
         __u8            sacked;         /* State flags for SACK/FACK.   */
 #define TCPCB_SACKED_ACKED      0x01    /* SKB ACK'd by a SACK block    */
 #define TCPCB_SACKED_RETRANS    0x02    /* SKB retransmitted            */