#define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */
+/* fn returns 0 to continue iteration */
+#define XT_MATCH_ITERATE(type, e, fn, args...) \
+({ \
+ unsigned int __i; \
+ int __ret = 0; \
+ struct xt_entry_match *__m; \
+ \
+ for (__i = sizeof(type); \
+ __i < (e)->target_offset; \
+ __i += __m->u.match_size) { \
+ __m = (void *)e + __i; \
+ \
+ __ret = fn(__m , ## args); \
+ if (__ret != 0) \
+ break; \
+ } \
+ __ret; \
+})
+
+/* fn returns 0 to continue iteration */
+#define XT_ENTRY_ITERATE_CONTINUE(type, entries, size, n, fn, args...) \
+({ \
+ unsigned int __i, __n; \
+ int __ret = 0; \
+ type *__entry; \
+ \
+ for (__i = 0, __n = 0; __i < (size); \
+ __i += __entry->next_offset, __n++) { \
+ __entry = (void *)(entries) + __i; \
+ if (__n < n) \
+ continue; \
+ \
+ __ret = fn(__entry , ## args); \
+ if (__ret != 0) \
+ break; \
+ } \
+ __ret; \
+})
+
+/* fn returns 0 to continue iteration */
+#define XT_ENTRY_ITERATE(type, entries, size, fn, args...) \
+ XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args)
+
#ifdef __KERNEL__
#include <linux/netdevice.h>
+/**
+ * struct xt_match_param - parameters for match extensions' match functions
+ *
+ * @in: input netdevice
+ * @out: output netdevice
+ * @match: struct xt_match through which this function was invoked
+ * @matchinfo: per-match data
+ * @fragoff: packet is a fragment, this is the data offset
+ * @thoff: position of transport header relative to skb->data
+ * @hotdrop: drop packet if we had inspection problems
+ * @family: Actual NFPROTO_* through which the function is invoked
+ * (helpful when match->family == NFPROTO_UNSPEC)
+ */
+struct xt_match_param {
+ const struct net_device *in, *out;
+ const struct xt_match *match;
+ const void *matchinfo;
+ int fragoff;
+ unsigned int thoff;
+ bool *hotdrop;
+ u_int8_t family;
+};
+
+/**
+ * struct xt_mtchk_param - parameters for match extensions'
+ * checkentry functions
+ *
+ * @table: table the rule is tried to be inserted into
+ * @entryinfo: the family-specific rule data
+ * (struct ipt_ip, ip6t_ip, ebt_entry)
+ * @match: struct xt_match through which this function was invoked
+ * @matchinfo: per-match data
+ * @hook_mask: via which hooks the new rule is reachable
+ */
+struct xt_mtchk_param {
+ const char *table;
+ const void *entryinfo;
+ const struct xt_match *match;
+ void *matchinfo;
+ unsigned int hook_mask;
+ u_int8_t family;
+};
+
+/* Match destructor parameters */
+struct xt_mtdtor_param {
+ const struct xt_match *match;
+ void *matchinfo;
+ u_int8_t family;
+};
+
+/**
+ * struct xt_target_param - parameters for target extensions' target functions
+ *
+ * @hooknum: hook through which this target was invoked
+ * @target: struct xt_target through which this function was invoked
+ * @targinfo: per-target data
+ *
+ * Other fields see above.
+ */
+struct xt_target_param {
+ const struct net_device *in, *out;
+ unsigned int hooknum;
+ const struct xt_target *target;
+ const void *targinfo;
+ u_int8_t family;
+};
+
+/**
+ * struct xt_tgchk_param - parameters for target extensions'
+ * checkentry functions
+ *
+ * @entryinfo: the family-specific rule data
+ * (struct ipt_entry, ip6t_entry, arpt_entry, ebt_entry)
+ *
+ * Other fields see above.
+ */
+struct xt_tgchk_param {
+ const char *table;
+ void *entryinfo;
+ const struct xt_target *target;
+ void *targinfo;
+ unsigned int hook_mask;
+ u_int8_t family;
+};
+
+/* Target destructor parameters */
+struct xt_tgdtor_param {
+ const struct xt_target *target;
+ void *targinfo;
+ u_int8_t family;
+};
+
struct xt_match
{
struct list_head list;
non-linear skb, using skb_header_pointer and
skb_ip_make_writable. */
bool (*match)(const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const struct xt_match *match,
- const void *matchinfo,
- int offset,
- unsigned int protoff,
- bool *hotdrop);
+ const struct xt_match_param *);
/* Called when user tries to insert an entry of this type. */
- /* Should return true or false. */
- bool (*checkentry)(const char *tablename,
- const void *ip,
- const struct xt_match *match,
- void *matchinfo,
- unsigned int hook_mask);
+ bool (*checkentry)(const struct xt_mtchk_param *);
/* Called when entry of this type deleted. */
- void (*destroy)(const struct xt_match *match, void *matchinfo);
+ void (*destroy)(const struct xt_mtdtor_param *);
/* Called when userspace align differs from kernel space one */
void (*compat_from_user)(void *dst, void *src);
/* Free to use by each match */
unsigned long data;
- char *table;
+ const char *table;
unsigned int matchsize;
unsigned int compatsize;
unsigned int hooks;
must now handle non-linear skbs, using skb_copy_bits and
skb_ip_make_writable. */
unsigned int (*target)(struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- unsigned int hooknum,
- const struct xt_target *target,
- const void *targinfo);
+ const struct xt_target_param *);
/* Called when user tries to insert an entry of this type:
hook_mask is a bitmask of hooks from which it can be
called. */
/* Should return true or false. */
- bool (*checkentry)(const char *tablename,
- const void *entry,
- const struct xt_target *target,
- void *targinfo,
- unsigned int hook_mask);
+ bool (*checkentry)(const struct xt_tgchk_param *);
/* Called when entry of this type deleted. */
- void (*destroy)(const struct xt_target *target, void *targinfo);
+ void (*destroy)(const struct xt_tgdtor_param *);
/* Called when userspace align differs from kernel space one */
void (*compat_from_user)(void *dst, void *src);
/* Set this to THIS_MODULE if you are a module, otherwise NULL */
struct module *me;
- char *table;
+ const char *table;
unsigned int targetsize;
unsigned int compatsize;
unsigned int hooks;
struct list_head list;
/* A unique name... */
- char name[XT_TABLE_MAXNAMELEN];
+ const char name[XT_TABLE_MAXNAMELEN];
/* What hooks you will enter on */
unsigned int valid_hooks;
/* Set this to THIS_MODULE if you are a module, otherwise NULL */
struct module *me;
- int af; /* address/protocol family */
+ u_int8_t af; /* address/protocol family */
};
#include <linux/netfilter_ipv4.h>
unsigned int initial_entries;
/* Entry points and underflows */
- unsigned int hook_entry[NF_IP_NUMHOOKS];
- unsigned int underflow[NF_IP_NUMHOOKS];
+ unsigned int hook_entry[NF_INET_NUMHOOKS];
+ unsigned int underflow[NF_INET_NUMHOOKS];
/* ipt_entry tables: one per CPU */
- char *entries[NR_CPUS];
+ /* Note : this field MUST be the last one, see XT_TABLE_INFO_SZ */
+ char *entries[1];
};
+#define XT_TABLE_INFO_SZ (offsetof(struct xt_table_info, entries) \
+ + nr_cpu_ids * sizeof(char *))
extern int xt_register_target(struct xt_target *target);
extern void xt_unregister_target(struct xt_target *target);
extern int xt_register_targets(struct xt_target *target, unsigned int n);
extern int xt_register_matches(struct xt_match *match, unsigned int n);
extern void xt_unregister_matches(struct xt_match *match, unsigned int n);
-extern int xt_check_match(const struct xt_match *match, unsigned short family,
- unsigned int size, const char *table, unsigned int hook,
- unsigned short proto, int inv_proto);
-extern int xt_check_target(const struct xt_target *target, unsigned short family,
- unsigned int size, const char *table, unsigned int hook,
- unsigned short proto, int inv_proto);
+extern int xt_check_match(struct xt_mtchk_param *,
+ unsigned int size, u_int8_t proto, bool inv_proto);
+extern int xt_check_target(struct xt_tgchk_param *,
+ unsigned int size, u_int8_t proto, bool inv_proto);
-extern int xt_register_table(struct xt_table *table,
- struct xt_table_info *bootstrap,
- struct xt_table_info *newinfo);
+extern struct xt_table *xt_register_table(struct net *net,
+ struct xt_table *table,
+ struct xt_table_info *bootstrap,
+ struct xt_table_info *newinfo);
extern void *xt_unregister_table(struct xt_table *table);
extern struct xt_table_info *xt_replace_table(struct xt_table *table,
struct xt_table_info *newinfo,
int *error);
-extern struct xt_match *xt_find_match(int af, const char *name, u8 revision);
-extern struct xt_target *xt_find_target(int af, const char *name, u8 revision);
-extern struct xt_target *xt_request_find_target(int af, const char *name,
+extern struct xt_match *xt_find_match(u8 af, const char *name, u8 revision);
+extern struct xt_target *xt_find_target(u8 af, const char *name, u8 revision);
+extern struct xt_target *xt_request_find_target(u8 af, const char *name,
u8 revision);
-extern int xt_find_revision(int af, const char *name, u8 revision, int target,
- int *err);
+extern int xt_find_revision(u8 af, const char *name, u8 revision,
+ int target, int *err);
-extern struct xt_table *xt_find_table_lock(int af, const char *name);
+extern struct xt_table *xt_find_table_lock(struct net *net, u_int8_t af,
+ const char *name);
extern void xt_table_unlock(struct xt_table *t);
-extern int xt_proto_init(int af);
-extern void xt_proto_fini(int af);
+extern int xt_proto_init(struct net *net, u_int8_t af);
+extern void xt_proto_fini(struct net *net, u_int8_t af);
extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
extern void xt_free_table_info(struct xt_table_info *info);
#define COMPAT_XT_ALIGN(s) (((s) + (__alignof__(struct compat_xt_counters)-1)) \
& ~(__alignof__(struct compat_xt_counters)-1))
-extern void xt_compat_lock(int af);
-extern void xt_compat_unlock(int af);
+extern void xt_compat_lock(u_int8_t af);
+extern void xt_compat_unlock(u_int8_t af);
+
+extern int xt_compat_add_offset(u_int8_t af, unsigned int offset, short delta);
+extern void xt_compat_flush_offsets(u_int8_t af);
+extern short xt_compat_calc_jump(u_int8_t af, unsigned int offset);
-extern int xt_compat_match_offset(struct xt_match *match);
-extern void xt_compat_match_from_user(struct xt_entry_match *m,
- void **dstptr, int *size);
+extern int xt_compat_match_offset(const struct xt_match *match);
+extern int xt_compat_match_from_user(struct xt_entry_match *m,
+ void **dstptr, unsigned int *size);
extern int xt_compat_match_to_user(struct xt_entry_match *m,
- void __user **dstptr, int *size);
+ void __user **dstptr, unsigned int *size);
-extern int xt_compat_target_offset(struct xt_target *target);
+extern int xt_compat_target_offset(const struct xt_target *target);
extern void xt_compat_target_from_user(struct xt_entry_target *t,
- void **dstptr, int *size);
+ void **dstptr, unsigned int *size);
extern int xt_compat_target_to_user(struct xt_entry_target *t,
- void __user **dstptr, int *size);
+ void __user **dstptr, unsigned int *size);
#endif /* CONFIG_COMPAT */
#endif /* __KERNEL__ */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff