Add netfilter.h

diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
new file mode 100644 (file)
index 0000000..0d1ba11
--- /dev/null
+++ b/include/linux/netfilter.h
@@ -0,0 +1,48 @@
+#ifndef __LINUX_NETFILTER_H
+#define __LINUX_NETFILTER_H
+
+#include <linux/compiler.h>
+
+/* Responses from hook functions. */
+#define NF_DROP 0
+#define NF_ACCEPT 1
+#define NF_STOLEN 2
+#define NF_QUEUE 3
+#define NF_REPEAT 4
+#define NF_STOP 5
+#define NF_MAX_VERDICT NF_STOP
+
+/* we overload the higher bits for encoding auxiliary data such as the queue
+ * number. Not nice, but better than additional function arguments. */
+#define NF_VERDICT_MASK 0x0000ffff
+#define NF_VERDICT_BITS 16
+
+#define NF_VERDICT_QMASK 0xffff0000
+#define NF_VERDICT_QBITS 16
+
+#define NF_QUEUE_NR(x) (((x << NF_VERDICT_QBITS) & NF_VERDICT_QMASK) | NF_QUEUE)
+
+/* only for userspace compatibility */
+/* Generic cache responses from hook functions.
+   <= 0x2000 is used for protocol-flags. */
+#define NFC_UNKNOWN 0x4000
+#define NFC_ALTERED 0x8000
+
+enum nf_inet_hooks {
+       NF_INET_PRE_ROUTING,
+       NF_INET_LOCAL_IN,
+       NF_INET_FORWARD,
+       NF_INET_LOCAL_OUT,
+       NF_INET_POST_ROUTING,
+       NF_INET_NUMHOOKS
+};
+
+union nf_inet_addr {
+       u_int32_t       all[4];
+       __be32          ip;
+       __be32          ip6[4];
+       struct in_addr  in;
+       struct in6_addr in6;
+};
+
+#endif /*__LINUX_NETFILTER_H*/