Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
new file mode 100644
index 0000000..2e20454
--- /dev/null
+++ b/include/linux/netfilter.h
@@ -0,0 +1,199 @@
+#ifndef __LINUX_NETFILTER_H
+#define __LINUX_NETFILTER_H
+
+#ifdef __KERNEL__
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/net.h>
+#include <linux/if.h>
+#include <linux/wait.h>
+#include <linux/list.h>
+#endif
+#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
+
+/* Generic cache responses from hook functions.
+ <= 0x2000 is used for protocol-flags. */
+#define NFC_UNKNOWN 0x4000
+#define NFC_ALTERED 0x8000
+
+#ifdef __KERNEL__
+#include <linux/config.h>
+#ifdef CONFIG_NETFILTER
+
+extern void netfilter_init(void);
+
+/* Largest hook number + 1 */
+#define NF_MAX_HOOKS 8
+
+struct sk_buff;
+struct net_device;
+
+typedef unsigned int nf_hookfn(unsigned int hooknum,
+ struct sk_buff **skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *));
+
+struct nf_hook_ops
+{
+ struct list_head list;
+
+ /* User fills in from here down. */
+ nf_hookfn *hook;
+ struct module *owner;
+ int pf;
+ int hooknum;
+ /* Hooks are ordered in ascending priority. */
+ int priority;
+};
+
+struct nf_sockopt_ops
+{
+ struct list_head list;
+
+ int pf;
+
+ /* Non-inclusive ranges: use 0/0/NULL to never get called. */
+ int set_optmin;
+ int set_optmax;
+ int (*set)(struct sock *sk, int optval, void __user *user, unsigned int len);
+
+ int get_optmin;
+ int get_optmax;
+ int (*get)(struct sock *sk, int optval, void __user *user, int *len);
+
+ /* Number of users inside set() or get(). */
+ unsigned int use;
+ struct task_struct *cleanup_task;
+};
+
+/* Each queued (to userspace) skbuff has one of these. */
+struct nf_info
+{
+ /* The ops struct which sent us to userspace. */
+ struct nf_hook_ops *elem;
+
+ /* If we're sent to userspace, this keeps housekeeping info */
+ int pf;
+ unsigned int hook;
+ struct net_device *indev, *outdev;
+ int (*okfn)(struct sk_buff *);
+};
+
+/* Function to register/unregister hook points. */
+int nf_register_hook(struct nf_hook_ops *reg);
+void nf_unregister_hook(struct nf_hook_ops *reg);
+
+/* Functions to register get/setsockopt ranges (non-inclusive). You
+ need to check permissions yourself! */
+int nf_register_sockopt(struct nf_sockopt_ops *reg);
+void nf_unregister_sockopt(struct nf_sockopt_ops *reg);
+
+extern struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];
+
+typedef void nf_logfn(unsigned int hooknum,
+ const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const char *prefix);
+
+/* Function to register/unregister log function. */
+int nf_log_register(int pf, nf_logfn *logfn);
+void nf_log_unregister(int pf, nf_logfn *logfn);
+
+/* Calls the registered backend logging function */
+void nf_log_packet(int pf,
+ unsigned int hooknum,
+ const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const char *fmt, ...);
+
+/* Activate hook; either okfn or kfree_skb called, unless a hook
+ returns NF_STOLEN (in which case, it's up to the hook to deal with
+ the consequences).
+
+ Returns -ERRNO if packet dropped. Zero means queued, stolen or
+ accepted.
+*/
+
+/* RR:
+ > I don't want nf_hook to return anything because people might forget
+ > about async and trust the return value to mean "packet was ok".
+
+ AK:
+ Just document it clearly, then you can expect some sense from kernel
+ coders :)
+*/
+
+/* This is gross, but inline doesn't cut it for avoiding the function
+ call in fast path: gcc doesn't inline (needs value tracking?). --RR */
+#ifdef CONFIG_NETFILTER_DEBUG
+#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \
+({int __ret; \
+if ((__ret=nf_hook_slow(pf, hook, &(skb), indev, outdev, okfn, INT_MIN)) == 1) \
+ __ret = (okfn)(skb); \
+__ret;})
+#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \
+({int __ret; \
+if ((__ret=nf_hook_slow(pf, hook, &(skb), indev, outdev, okfn, thresh)) == 1) \
+ __ret = (okfn)(skb); \
+__ret;})
+#else
+#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \
+({int __ret; \
+if (list_empty(&nf_hooks[pf][hook]) || \
+ (__ret=nf_hook_slow(pf, hook, &(skb), indev, outdev, okfn, INT_MIN)) == 1) \
+ __ret = (okfn)(skb); \
+__ret;})
+#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \
+({int __ret; \
+if (list_empty(&nf_hooks[pf][hook]) || \
+ (__ret=nf_hook_slow(pf, hook, &(skb), indev, outdev, okfn, thresh)) == 1) \
+ __ret = (okfn)(skb); \
+__ret;})
+#endif
+
+int nf_hook_slow(int pf, unsigned int hook, struct sk_buff **pskb,
+ struct net_device *indev, struct net_device *outdev,
+ int (*okfn)(struct sk_buff *), int thresh);
+
+/* Call setsockopt() */
+int nf_setsockopt(struct sock *sk, int pf, int optval, char __user *opt,
+ int len);
+int nf_getsockopt(struct sock *sk, int pf, int optval, char __user *opt,
+ int *len);
+
+/* Packet queuing */
+typedef int (*nf_queue_outfn_t)(struct sk_buff *skb,
+ struct nf_info *info, void *data);
+extern int nf_register_queue_handler(int pf,
+ nf_queue_outfn_t outfn, void *data);
+extern int nf_unregister_queue_handler(int pf);
+extern void nf_reinject(struct sk_buff *skb,
+ struct nf_info *info,
+ unsigned int verdict);
+
+extern void (*ip_ct_attach)(struct sk_buff *, struct sk_buff *);
+extern void nf_ct_attach(struct sk_buff *, struct sk_buff *);
+
+/* FIXME: Before cache is ever used, this must be implemented for real. */
+extern void nf_invalidate_cache(int pf);
+
+#else /* !CONFIG_NETFILTER */
+#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) (okfn)(skb)
+static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
+#endif /*CONFIG_NETFILTER*/
+
+#endif /*__KERNEL__*/
+#endif /*__LINUX_NETFILTER_H*/