[NETFILTER]: xt_conntrack: add port and direction matching

Extend the xt_conntrack match revision 1 by port matching (all four
{orig,repl}{src,dst}) and by packet direction matching.

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 18 insertions, 12 deletions

diff --git a/include/linux/netfilter/xt_conntrack.h b/include/linux/netfilter/xt_conntrack.h
index d2492a3329be..f3fd83e46bab 100644
--- a/include/linux/netfilter/xt_conntrack.h
+++ b/include/linux/netfilter/xt_conntrack.h
@@ -6,9 +6,6 @@
 #define _XT_CONNTRACK_H
 
 #include <linux/netfilter/nf_conntrack_tuple_common.h>
-#ifdef __KERNEL__
-#       include <linux/in.h>
-#endif
 
 #define XT_CONNTRACK_STATE_BIT(ctinfo) (1 << ((ctinfo)%IP_CT_IS_REPLY+1))
 #define XT_CONNTRACK_STATE_INVALID (1 << 0)
@@ -18,14 +15,21 @@
 #define XT_CONNTRACK_STATE_UNTRACKED (1 << (IP_CT_NUMBER + 3))
 
 /* flags, invflags: */
-#define XT_CONNTRACK_STATE      0x01
-#define XT_CONNTRACK_PROTO      0x02
-#define XT_CONNTRACK_ORIGSRC    0x04
-#define XT_CONNTRACK_ORIGDST    0x08
-#define XT_CONNTRACK_REPLSRC    0x10
-#define XT_CONNTRACK_REPLDST    0x20
-#define XT_CONNTRACK_STATUS     0x40
-#define XT_CONNTRACK_EXPIRES    0x80
+enum {
+        XT_CONNTRACK_STATE        = 1 << 0,
+        XT_CONNTRACK_PROTO        = 1 << 1,
+        XT_CONNTRACK_ORIGSRC      = 1 << 2,
+        XT_CONNTRACK_ORIGDST      = 1 << 3,
+        XT_CONNTRACK_REPLSRC      = 1 << 4,
+        XT_CONNTRACK_REPLDST      = 1 << 5,
+        XT_CONNTRACK_STATUS       = 1 << 6,
+        XT_CONNTRACK_EXPIRES      = 1 << 7,
+        XT_CONNTRACK_ORIGSRC_PORT = 1 << 8,
+        XT_CONNTRACK_ORIGDST_PORT = 1 << 9,
+        XT_CONNTRACK_REPLSRC_PORT = 1 << 10,
+        XT_CONNTRACK_REPLDST_PORT = 1 << 11,
+        XT_CONNTRACK_DIRECTION    = 1 << 12,
+};
 
 /* This is exposed to userspace, so remains frozen in time. */
 struct ip_conntrack_old_tuple
@@ -70,8 +74,10 @@ struct xt_conntrack_mtinfo1 {
         union nf_inet_addr repldst_addr, repldst_mask;
         u_int32_t expires_min, expires_max;
         u_int16_t l4proto;
+        __be16 origsrc_port, origdst_port;
+        __be16 replsrc_port, repldst_port;
+        u_int16_t match_flags, invert_flags;
         u_int8_t state_mask, status_mask;
-        u_int8_t match_flags, invert_flags;
 };
 
 #endif /*_XT_CONNTRACK_H*/