#define NFC_ALTERED 0x8000
#endif
+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];
+};
+
#ifdef __KERNEL__
-#include <linux/config.h>
#ifdef CONFIG_NETFILTER
extern void netfilter_init(void);
struct net_device;
typedef unsigned int nf_hookfn(unsigned int hooknum,
- struct sk_buff **skb,
+ struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *));
int (*compat_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;
+ /* Use the module struct to lock set/get code in place */
+ struct module *owner;
};
-/* 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);
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];
-
-/* those NF_LOG_* defines and struct nf_loginfo are legacy definitios that will
- * disappear once iptables is replaced with pkttables. Please DO NOT use them
- * for any new code! */
-#define NF_LOG_TCPSEQ 0x01 /* Log TCP sequence numbers */
-#define NF_LOG_TCPOPT 0x02 /* Log TCP options */
-#define NF_LOG_IPOPT 0x04 /* Log IP options */
-#define NF_LOG_UID 0x08 /* Log UID owning local socket */
-#define NF_LOG_MASK 0x0f
-
-#define NF_LOG_TYPE_LOG 0x01
-#define NF_LOG_TYPE_ULOG 0x02
-
-struct nf_loginfo {
- u_int8_t type;
- union {
- struct {
- u_int32_t copy_len;
- u_int16_t group;
- u_int16_t qthreshold;
- } ulog;
- struct {
- u_int8_t level;
- u_int8_t logflags;
- } log;
- } u;
-};
+#ifdef CONFIG_SYSCTL
+/* Sysctl registration */
+struct ctl_table_header *nf_register_sysctl_table(struct ctl_table *path,
+ struct ctl_table *table);
+void nf_unregister_sysctl_table(struct ctl_table_header *header,
+ struct ctl_table *table);
+extern struct ctl_table nf_net_netfilter_sysctl_path[];
+extern struct ctl_table nf_net_ipv4_netfilter_sysctl_path[];
+#endif /* CONFIG_SYSCTL */
-typedef void nf_logfn(unsigned int pf,
- unsigned int hooknum,
- const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const struct nf_loginfo *li,
- const char *prefix);
-
-struct nf_logger {
- struct module *me;
- nf_logfn *logfn;
- char *name;
-};
+extern struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];
-/* Function to register/unregister log function. */
-int nf_log_register(int pf, struct nf_logger *logger);
-int nf_log_unregister_pf(int pf);
-void nf_log_unregister_logger(struct nf_logger *logger);
-
-/* 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,
- struct nf_loginfo *li,
- const char *fmt, ...);
-
-int nf_hook_slow(int pf, unsigned int hook, struct sk_buff **pskb,
+int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb,
struct net_device *indev, struct net_device *outdev,
int (*okfn)(struct sk_buff *), int thresh);
* value indicates the packet has been consumed by the hook.
*/
static inline int nf_hook_thresh(int pf, unsigned int hook,
- struct sk_buff **pskb,
+ struct sk_buff *skb,
struct net_device *indev,
struct net_device *outdev,
int (*okfn)(struct sk_buff *), int thresh,
if (list_empty(&nf_hooks[pf][hook]))
return 1;
#endif
- return nf_hook_slow(pf, hook, pskb, indev, outdev, okfn, thresh);
+ return nf_hook_slow(pf, hook, skb, indev, outdev, okfn, thresh);
}
-static inline int nf_hook(int pf, unsigned int hook, struct sk_buff **pskb,
+static inline int nf_hook(int pf, unsigned int hook, struct sk_buff *skb,
struct net_device *indev, struct net_device *outdev,
int (*okfn)(struct sk_buff *))
{
- return nf_hook_thresh(pf, hook, pskb, indev, outdev, okfn, INT_MIN, 1);
+ return nf_hook_thresh(pf, hook, skb, indev, outdev, okfn, INT_MIN, 1);
}
/* Activate hook; either okfn or kfree_skb called, unless a hook
#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \
({int __ret; \
-if ((__ret=nf_hook_thresh(pf, hook, &(skb), indev, outdev, okfn, thresh, 1)) == 1)\
+if ((__ret=nf_hook_thresh(pf, hook, (skb), indev, outdev, okfn, thresh, 1)) == 1)\
__ret = (okfn)(skb); \
__ret;})
#define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond) \
({int __ret; \
-if ((__ret=nf_hook_thresh(pf, hook, &(skb), indev, outdev, okfn, INT_MIN, cond)) == 1)\
+if ((__ret=nf_hook_thresh(pf, hook, (skb), indev, outdev, okfn, INT_MIN, cond)) == 1)\
__ret = (okfn)(skb); \
__ret;})
int compat_nf_getsockopt(struct sock *sk, int pf, int optval,
char __user *opt, int *len);
-/* Packet queuing */
-struct nf_queue_handler {
- int (*outfn)(struct sk_buff *skb, struct nf_info *info,
- unsigned int queuenum, void *data);
- void *data;
- char *name;
-};
-extern int nf_register_queue_handler(int pf,
- struct nf_queue_handler *qh);
-extern int nf_unregister_queue_handler(int pf);
-extern void nf_unregister_queue_handlers(struct nf_queue_handler *qh);
-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);
-
/* Call this before modifying an existing packet: ensures it is
modifiable and linear to the point you care about (writable_len).
Returns true or false. */
-extern int skb_make_writable(struct sk_buff **pskb, unsigned int writable_len);
+extern int skb_make_writable(struct sk_buff *skb, unsigned int writable_len);
-struct nf_queue_rerouter {
- void (*save)(const struct sk_buff *skb, struct nf_info *info);
- int (*reroute)(struct sk_buff **skb, const struct nf_info *info);
- int rer_size;
+struct flowi;
+struct nf_queue_entry;
+
+struct nf_afinfo {
+ unsigned short family;
+ __sum16 (*checksum)(struct sk_buff *skb, unsigned int hook,
+ unsigned int dataoff, u_int8_t protocol);
+ int (*route)(struct dst_entry **dst, struct flowi *fl);
+ void (*saveroute)(const struct sk_buff *skb,
+ struct nf_queue_entry *entry);
+ int (*reroute)(struct sk_buff *skb,
+ const struct nf_queue_entry *entry);
+ int route_key_size;
};
-#define nf_info_reroute(x) ((void *)x + sizeof(struct nf_info))
+extern const struct nf_afinfo *nf_afinfo[NPROTO];
+static inline const struct nf_afinfo *nf_get_afinfo(unsigned short family)
+{
+ return rcu_dereference(nf_afinfo[family]);
+}
-extern int nf_register_queue_rerouter(int pf, struct nf_queue_rerouter *rer);
-extern int nf_unregister_queue_rerouter(int pf);
+static inline __sum16
+nf_checksum(struct sk_buff *skb, unsigned int hook, unsigned int dataoff,
+ u_int8_t protocol, unsigned short family)
+{
+ const struct nf_afinfo *afinfo;
+ __sum16 csum = 0;
+
+ rcu_read_lock();
+ afinfo = nf_get_afinfo(family);
+ if (afinfo)
+ csum = afinfo->checksum(skb, hook, dataoff, protocol);
+ rcu_read_unlock();
+ return csum;
+}
+
+extern int nf_register_afinfo(const struct nf_afinfo *afinfo);
+extern void nf_unregister_afinfo(const struct nf_afinfo *afinfo);
#include <net/flow.h>
extern void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *);
static inline void
nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, int family)
{
-#ifdef CONFIG_IP_NF_NAT_NEEDED
+#ifdef CONFIG_NF_NAT_NEEDED
void (*decodefn)(struct sk_buff *, struct flowi *);
- if (family == AF_INET && (decodefn = ip_nat_decode_session) != NULL)
- decodefn(skb, fl);
+ if (family == AF_INET) {
+ rcu_read_lock();
+ decodefn = rcu_dereference(ip_nat_decode_session);
+ if (decodefn)
+ decodefn(skb, fl);
+ rcu_read_unlock();
+ }
#endif
}
#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) (okfn)(skb)
#define NF_HOOK_COND(pf, hook, skb, indev, outdev, okfn, cond) (okfn)(skb)
static inline int nf_hook_thresh(int pf, unsigned int hook,
- struct sk_buff **pskb,
+ struct sk_buff *skb,
struct net_device *indev,
struct net_device *outdev,
int (*okfn)(struct sk_buff *), int thresh,
int cond)
{
- return okfn(*pskb);
+ return okfn(skb);
}
-static inline int nf_hook(int pf, unsigned int hook, struct sk_buff **pskb,
+static inline int nf_hook(int pf, unsigned int hook, struct sk_buff *skb,
struct net_device *indev, struct net_device *outdev,
int (*okfn)(struct sk_buff *))
{
return 1;
}
-static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
struct flowi;
static inline void
nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, int family) {}
#endif /*CONFIG_NETFILTER*/
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+extern void (*ip_ct_attach)(struct sk_buff *, struct sk_buff *);
+extern void nf_ct_attach(struct sk_buff *, struct sk_buff *);
+extern void (*nf_ct_destroy)(struct nf_conntrack *);
+#else
+static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
+#endif
+
#endif /*__KERNEL__*/
#endif /*__LINUX_NETFILTER_H*/
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff