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authorPatrick McHardy <kaber@trash.net>2006-03-20 17:59:06 -0800
committerDavid S. Miller <davem@davemloft.net>2006-03-20 17:59:06 -0800
commit37f9f7334b86ffc3b8a1921842ae33cb9aa22ee3 (patch)
treed207ae0a0f2eb37072dd4690de95b6cf170e4e04 /include
parent6ea46c9c12da79ec6eead0cf4b3114143dd30bc1 (diff)
downloadop-kernel-dev-37f9f7334b86ffc3b8a1921842ae33cb9aa22ee3.zip
op-kernel-dev-37f9f7334b86ffc3b8a1921842ae33cb9aa22ee3.tar.gz
[NETFILTER]: xt_tables: add centralized error checking
Introduce new functions for common match/target checks (private data size, valid hooks, valid tables and valid protocols) to get more consistent error reporting and to avoid each module duplicating them. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/netfilter/x_tables.h23
1 files changed, 19 insertions, 4 deletions
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h
index 6500d4e..b9c37e1 100644
--- a/include/linux/netfilter/x_tables.h
+++ b/include/linux/netfilter/x_tables.h
@@ -92,8 +92,6 @@ struct xt_match
const char name[XT_FUNCTION_MAXNAMELEN-1];
- u_int8_t revision;
-
/* Return true or false: return FALSE and set *hotdrop = 1 to
force immediate packet drop. */
/* Arguments changed since 2.6.9, as this must now handle
@@ -120,6 +118,12 @@ struct xt_match
/* Set this to THIS_MODULE if you are a module, otherwise NULL */
struct module *me;
+
+ char *table;
+ unsigned int matchsize;
+ unsigned int hooks;
+ unsigned short proto;
+ u_int8_t revision;
};
/* Registration hooks for targets. */
@@ -129,8 +133,6 @@ struct xt_target
const char name[XT_FUNCTION_MAXNAMELEN-1];
- u_int8_t revision;
-
/* Returns verdict. Argument order changed since 2.6.9, as this
must now handle non-linear skbs, using skb_copy_bits and
skb_ip_make_writable. */
@@ -156,6 +158,12 @@ struct xt_target
/* Set this to THIS_MODULE if you are a module, otherwise NULL */
struct module *me;
+
+ char *table;
+ unsigned int targetsize;
+ unsigned int hooks;
+ unsigned short proto;
+ u_int8_t revision;
};
/* Furniture shopping... */
@@ -207,6 +215,13 @@ extern void xt_unregister_target(int af, struct xt_target *target);
extern int xt_register_match(int af, struct xt_match *target);
extern void xt_unregister_match(int af, struct xt_match *target);
+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_register_table(struct xt_table *table,
struct xt_table_info *bootstrap,
struct xt_table_info *newinfo);
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